Caffeine Increases Endurance

By: Dr. Gabe Mirkin, M.D.

Caffeinated drinks increase endurance during long events such as a marathon, triathalon or bicycle race. A study from the University of Birmingham in England shows that caffeine helps the body use more carbohydrates from drinks that you take during exercise (Journal of Applied Physiology, June 2006). Those who took sugared drinks with caffeine were able to absorb and use 26 percent more of the ingested sugar than those who took the same drinks without caffeine.

Previous studies show that caffeine helps athletes run faster in both short and long-distance races. In short races, it makes athletes faster by causing the brain to send messages along nerves to cause a greater percentage of muscle fibers to contract at the same time. In longer races, it delays fatigue by preserving stored muscle sugar. Muscles get their energy from sugar and fat in the bloodstream, and from sugar, fat and protein stored in the muscles. When muscles run out of their stored sugar, they hurt and become more difficult to coordinate. Caffeine causes muscles to burn more fat, thus sparing stored muscle sugar to delay fatigue.

Nobody really knows how much caffeine you can take in without harming yourself. At rest, caffeine is a diuretic, but during exercise it does not increase urination. Caffeine is a potent stimulant that can cause irregular heartbeats in people who already have heart disease, and raise blood pressure in people with hypertension. Most research shows that it doesn't take much more than one or two soft drinks to increase endurance. Caffeine loses its beneficial effects with repeated exposure, so athletes who want to gain maximum advantage from caffeine during competition should avoid drinking caffeinated beverages when they are not exercising.

 A study from the University of Connecticut shows that caffeinated drinks are safe for most people when they exercise. When you take caffeinated drinks such as coffee, tea or cola and do not exercise, the caffeine can act as a diuretic and drain fluid from your body. However, during exercise, caffeine does not increase urination, so it does not take fluid from your body.

Caffeine also can help you exercise longer. Your muscles get much of their energy from sugar that they store inside their fibers. When a muscle runs out of its stored sugar, it hurts and cannot contract as effectively. Caffeine raises blood levels of a fat called triglycerides, causes the muscles to burn more fat for energy and thus spares the sugar inside muscles to prolong endurance. So drinks containing caffeine can help increase endurance during exercise.

Caffeine, body fluid-electrolyte balance, and exercise performance. International Journal of Sport Nutrition and Exercise Metabolism, 2002, Vol 12, Iss 2, pp 189-206. LE Armstrong. Univ Connecticut, Dept Kinesiol, Storrs,CT 06269 USA

 

Peanut Butter as Running Food

 

In this day and age of energy bars, protein powders and weight gain shakes, many athletes forget about "real" foods, such as peanut butter. Peanut butter is one of the best sports foods around. It is tasty, inexpensive, satisfying, nourishing, and even good for our health. But all too often, one can hear athletes say "I don't keep peanut butter in my house: it is too fatty, too fattening" or "I ration peanut butter to once per week, on my Sunday morning bagel". They try to stay away from peanut butter. That is nuts! Yes, peanut butter is calorie-dense, but it can beneficially fit into your sports diet

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The following information explains why peanut butter (and all nuts and nut butters, for that matter) can be considered a super sports food for athletes who want to eat well and invest in their health.

Peanut butter is satiating and satisfying… perfect for dieters – Because you will never win the war against hunger, your best bet is to eat foods that keep you feeling fed. This means, foods with protein and fiber, like peanut butter (and nuts, in general). You will feel fuller for longer if you have half a whole wheat bagel with peanut butter, as compared to the same amount of calories of a plain white bagel. The protein and fiber in peanut butter "sticks to your ribs" and is not fattening, unless you overeat total calories that day. A Perdue University study reports subjects who ate peanuts every day did not overeat daily calories (Kirkmeyer, "International Journal of Obesity", 24:1167, 2000). Peanut eaters tend to naturally eat less at other times of the day (Alper, "International Journal of Obesity", 26:1129, 2002). Plus, if you enjoy what you are eating on your reducing diet, you will stay with the food plan and be able to keep the weight off. This is far better than yo-yo dieting!

Peanut butter is a quick and easy way to reduce your risk of heart disease – Just slap together a peanut butter (and honey or jelly) sandwich on multi-grain bread, and you have the makings of a heart-healthy meal, if not a childhood memory. A quick and easy peanut butter sandwich is healthier, by far, than a fast-food burger or fried chicken dinner and far better than, let's say, an equally easy "meal" of chips or ice cream. That is because peanut butter offers health-protective mono- and polyunsaturated oil. Trading burgers (saturated fat) for peanut butter sandwiches reduces your risk of developing heart disease. In fact, the more often you eat peanut butter (and nuts), the lower your risk of heart disease(Hu, "Journal of the American College of Nutrition" 20(1):5, 2001). Start spreading peanut butter (instead of butter) on toast. Enjoy peanut butter & banana for a "decadent" snack in place of ice cream.

Peanut butter is an affordable source of calories – If you are a hungry athlete who needs 3000 or more calories a day, you can spend a significant amount of money fueling yourself (especially if you routinely eat protein bars, weight gain shakes and other engineered sports foods). Peanut butter can fuel your body without breaking the bank. One hundred calories of peanut butter (about 1 tablespoon) costs far less than 100 calories of other protein sources, such as cottage cheese, tuna and deli turkey breast. The cost of 200 calories of peanut butter is far less than the money you would spend on 200 calories of an energy bar… and generally, the peanut butter is far tastier!

Peanut butter is a source of protein, needed to build and repair muscles – But take note: peanut butter is not protein-dense. That is, two tablespoons of peanut butter, the amount in an average sandwich, provides about 7 grams of protein. In comparison, the calorie equivalent of turkey in a sandwich offers about 20 grams of protein. Athletes who weigh 140 pounds may need 70 to 100 grams protein per day; 200-pound athletes, 100 to 150 grams. For 100 grams of protein, you would have to eat the whole jar of peanut butter! Unlikely. To boost the protein value of peanut butter, simply accompany it with a tall glass of milk: a peanut butter & jelly sandwich with 16 ounces lowfat milk equals 28 grams of protein, a good chunk of your daily requirement. Milk simultaneously enhances the value of the protein in the peanut butter sandwich. That is, peanuts are low in some of the essential amino acids muscles need for growth and repair. The amino acids in milk (as well as those in the sandwich bread) nicely complement the limiting amino acids in peanuts.

Peanut butter is a reasonable source of vitamins, minerals and other health-protective food compounds – For example, peanut butter contains folate, vitamin E, magnesium and resveratrol, all nutrients associated with reduced risk of heart disease. Magnesium is also associated with reduced risk of adult-onset diabetes. Peanut butter offers a small amount of zinc, a mineral important for healing and strengthening the immune system. As an athlete, you need all these nutrients to keep you off the bench and on the playing field.

Peanut butter contains fiber – not a lot (1 gram per tablespoon) but some – Fiber in food contributes to a feeling of fullness that can help dieters eat less without feeling hungry. Fiber also promotes regular bowel movements and helps reduce problems with constipation. By enjoying peanut butter on whole grain bread, you can contribute 6 to 8 grams of fiber towards the recommended target of 20 to 35 grams fiber per day.

Peanuts contain mostly health-protective mono- and polyunsaturated fats – When peanuts are made into commercial peanut butter, some of the oil gets converted into a harder, saturated fat. This keeps the oil from separating to the top. The hardened oil, called trans-fat, is less healthful. But the good news is, commercial peanut butters contain only a tiny amount of trans fats and just a small amount of (naturally occurring) saturated fat. For example, only 3.5 of the 17 grams fat in two tablespoons of commercial peanut butter are "bad". To minimize your intake of even this small amount of unhealthful fat, you can buy all-natural peanut butter. If you dislike the way the oil in this type of peanut butter separates to the top of the jar, simply store the jar upside down. That way, the oil rises to what becomes the bottom of the jar when you turn it over to open it. And if you eat peanut butter daily, you won't have to refrigerate it, thereby making the all-natural peanut butter easier to spread.

Caution: peanut butter is a poor source of the carbohydrates needed for muscle fuel – Don't try to subsist on peanut butter by the spoonful! Luckily, peanut butter combines nicely with banana, bread, apples, oatmeal, crackers, raisins, and even pasta (as in Thai noodle dishes). These combinations will balance your sports diet.

Jogging or cycling through middle age can delay aging by 12 years

 

Exercise: Cycling can hold back the years

By JENNY HOPE

Taking regular aerobic exercise could stop the biological clock and delay ageing by up to 12 years, claim researchers.

Keeping fit by jogging or cycling through middle age and beyond slows and even reverses the decline in muscle power, balance and co-ordination in later life.

Without regular workouts, maximum aerobic power falls in men by up to half between the ages of 20 and 60.

Women begin to lose fitness aged around 35, with aerobic power also falling by up to half by the age of 60.

 

Eventually, everyday activities become "intolerably fatiguing" for older men and women, says the study published in the British Journal of Sports Medicine.

But cardiovascular training – which strengthens the heart and lungs – would compensate for the onset of middle age, when the body's capacity to use oxygen and generate energy falls with each passing decade.

 And it has the added bonus of prolonging physical independence in old age, according to physical education experts at Toronto University.

They were exploring the idea, first put forward by them 20 years ago, that one of the most important factors influencing the quality of life in old people was the maintenance of sufficient "aerobic power".

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The latest study analysed existing research to discover how far the benefits of training last into old age.

It found that relatively high-intensity aerobic exercise over a relatively long period of time could boost maximal aerobic power by 25 per cent.

Dr Roy Shephard, of the university's faculty of physical education and health, said long-term aerobic training can maintain or restore aerobic power in later life.

The effect is the equivalent of turning back the biological clock for older people by up to 12 years, he added.

He said: "A regular exercise programme can slow or reverse the loss of aerobic fitness, reducing the individual's biological age and prolonging independence."

In the UK, most people do not exercise five times a week for 30 minutes or more – the Government's official recommendation for maximum health benefits.

The level of exertion should be enough to raise the heart rate to 120 beats a minute or higher, which includes a brisk walk and swimming.

But taking a stroll or even doing the gardening is also regarded as healthy activity.

A recent survey revealed at least one-quarter of men and women take no moderate or vigorous physical activity.

Other evidence shows regular activity cuts the risk of a range of health problems including diabetes, depression and heart disease. It also reduces the chances of premature death from any illness.

Can You Get Fit in Six Minutes a Week?

 

A few years ago, researchers at the National Institute of Health and Nutrition in Japan put rats through a series of swim tests with surprising results. They had one group of rodents paddle in a small pool for six hours, this long workout broken into two sessions of three hours each. A second group of rats were made to stroke furiously through short, intense bouts of swimming, while carrying ballast to increase their workload. After 20 seconds, the weighted rats were scooped out of the water and allowed to rest for 10 seconds, before being placed back in the pool for another 20 seconds of exertion. The scientists had the rats repeat these brief, strenuous swims 14 times, for a total of about four-and-a-half minutes of swimming. Afterward, the researchers tested each rat’s muscle fibers and found that, as expected, the rats that had gone for the six-hour swim showed preliminary molecular changes that would increase endurance. But the second rodent group, which exercised for less than five minutes also showed the same molecular changes.

The potency of interval training is nothing new. Many athletes have been straining through interval sessions once or twice a week along with their regular workout for years. But what researchers have been looking at recently is whether humans, like that second group of rats, can increase endurance with only a few minutes of strenuous exercise, instead of hours? Could it be that most of us are spending more time than we need to trying to get fit?

The answer, a growing number of these sports scientists believe, may be yes.

“There was a time when the scientific literature suggested that the only way to achieve endurance was through endurance-type activities,” such as long runs or bike rides or, perhaps, six-hour swims, says Martin Gibala, PhD, chairman of the Department of Kinesiology at McMaster University in Ontario, Canada. But ongoing research from Gibala’s lab is turning that idea on its head. In one of the group’s recent studies, Gibala and his colleagues had a group of college students, who were healthy but not athletes, ride a stationary bike at a sustainable pace for between 90 and 120 minutes. Another set of students grunted through a series of short, strenuous intervals: 20 to 30 seconds of cycling at the highest intensity the riders could stand. After resting for four minutes, the students pedaled hard again for another 20 to 30 seconds, repeating the cycle four to six times (depending on how much each person could stand), “for a total of two to three minutes of very intense exercise per training session,” Gibala says.

Each of the two groups exercised three times a week. After two weeks, both groups showed almost identical increases in their endurance (as measured in a stationary bicycle time trial), even though the one group had exercised for six to nine minutes per week, and the other about five hours. Additionally, molecular changes that signal increased fitness were evident equally in both groups. “The number and size of the mitochondria within the muscles” of the students had increased significantly, Gibala says, a change that, before this work, had been associated almost exclusively with prolonged endurance training. Since mitochondria enable muscle cells to use oxygen to create energy, “changes in the volume of the mitochondria can have a big impact on endurance performance.” In other words, six minutes or so a week of hard exercise (plus the time spent warming up, cooling down, and resting between the bouts of intense work) had proven to be as good as multiple hours of working out for achieving fitness. The short, intense workouts aided in weight loss, too, although Gibala hadn’t been studying that effect. “The rate of energy expenditure remains higher longer into recovery” after brief, high-intensity exercise than after longer, easier workouts, Gibala says. Other researchers have found that similar, intense, brief sessions of exercise improve cardiac health, even among people with heart disease.

There’s a catch, though. Those six minutes, if they’re to be effective, must hurt. “We describe it as an ‘all-out’ effort,” Gibala says. You’ll be straying “well out of your comfort zone.” That level of discomfort makes some activities better-suited to intense training than others. “We haven’t studied runners,” Gibala says. The pounding involved in repeated sprinting could lead to injuries, depending on a runner’s experience and stride mechanics. But cycling and swimming work well. “I’m a terrible swimmer,” Gibala says, “so every session for me is intense, just because my technique is so awful.”
Meanwhile, his lab is studying whether people could telescope their workouts into even less time. Could a single, two- to three-minute bout of intense exercise confer the same endurance and health benefits as those six minutes of multiple intervals? Gibala is hopeful. “I’m 41, with two young children,” he says. “I don’t have time to go out and exercise for hours.” The results should be available this fall.

 

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Women+Belly Fat = Not good

 

Belly Fat Doesn’t Bode Well for Women

Having a big waist may raise women’s death rates, even in women who aren’t overweight.

That news comes from a study of 44,600 female nurses enrolled in a long-term health study.

The bottom line: Waists mattered more than weight.

Being in the normal weight range was less important than having a waist less than 34.6 inches and a waist-to-hip ratio of less than 0.88 .To calculate your waist-to-hip ratio, divide your waist measurement by your hip measurement.

"Although maintaining a healthy weight should continue to be a cornerstone in the prevention of chronic diseases and premature death, it is equally important to maintain a healthy waist size and prevent abdominal obesity," the researchers write in the April 1 edition of Circulation.

Belly Fat Study

When the nurses were 40 to 65 years old, they measured their waists and hips for the study. At the time, none had had heart disease or cancer.

Every two years, they updated their health and lifestyle records for the study, including their physical activity, smoking, alcohol use, and menopausal status.

The nurses were followed for 16 years. During that time, a total of 3,507 of the nurses died, including 751 who died of heart disease and 1,748 who died of cancer.

Regardless of other factors, including BMI ( body mass index, which relates height to weight), women with larger waists and greater waist-to-hip ratios had higher death rates from all causes, including heart disease and cancer, which are the top two killers of U.S. women.

For example, among women of normal weight, those with a waist larger than 34.6 inches were three times as likely to die of heart disease, compared to women with smaller waists.

Large hips weren’t a problem, if the waist wasn’t also large. In fact, having large hips and a small waist was associated with lower risk of death from heart disease.

 

Waist Check

Simply measuring the waist will do. The waist-to-hip ratio wasn’t a better predictor of death rates and is more cumbersome, note the researchers, who included Cuilin Zhang, MD, PhD, of the National Institute of Child Health and Human Development.

Zhang’s team used the definitions for abdominal obesity recommended by the American Heart Association and U.S. Department of Agriculture. Those cutoffs are waist circumference of 34.6 inches for women and 40 inches for men.

The study doesn’t prove that abdominal fat is lethal. Observational studies like this one don’t prove cause and effect.

Why fast foods are bad, even in moderation

 

Eating a diet consisting largely of fast food could cause your waistline to bulge more than eating the same amount of fat from healthier sources.

Monkeys fed a diet rich in trans-fats – commonly found in fast foods – grew bigger bellies than those fed a diet rich in unsaturated fats, but containing the same overall number of calories. They also developed signs of insulin resistance, which is an early indicator of diabetes.

Trans-fats, or partially hydrogenated oils, are found in many fast foods and also in baked goods and processed snacks. They dramatically increase the risk of heart disease – even more than saturated fats found in animal products.

Kylie Kavanagh, at Wake Forest University Baptist Medical Center in Winston-Salem, North Carolina, US, wondered how this "killer fat" would affect the risk of diabetes in 51 vervet monkeys.

She fed one group of monkeys a diet where 8% of their daily calories came from trans-fats and another 27% came from other fats. This is comparable to people who eat a lot of fried food, says Kavanagh. A different group of monkeys was fed the same diet, but the trans-fats were substituted for mono-unsaturated fats, found in olive oil, for example.

Both groups ate the same total calories, which were carefully metered to be just enough for subsistence.

Path to diabetes

After six years on the diet, the trans-fat-fed monkeys had gained 7.2% of their body weight, compared to just 1.8% in the unsaturated group. CT scans also revealed that the trans-fat monkeys carried 30% more abdominal fat, which is risk factor for diabetes and heart disease.

"We were shocked. Despite all our enormous efforts to make sure they didn’t gain weight, they still did. And most of that weight ended up on their tummies," says Kavanagh, who presented her findings at the American Diabetes Association meeting in Washington DC, on Monday. "This is walking them straight down the path to diabetes."

This is the first study to show such a dramatic result on abdominal fat, adds Dariush Mozaffarian at the Harvard School of Public Health in Boston, US. "The days of thinking about fats just as calories are over," he says.

Partially hydrogenated oils can easily be replaced by other oils during food production. Last week, fast-food giant Wendy’s announced that it was cutting partially hydrogenated oils from its food in the US and Canada, while in January, food manufacturers in US were ordered to label all trans-fats on packaged goods.

‘Superfoods’ Everyone Needs to Stay Alive and Healthy

 

Experts say dozens of easy-to-find ‘superfoods’ can help ward off heart disease, cancer, cholesterol, and more.

Imagine a superfood — not a drug — powerful enough to help you lower your cholesterol, reduce your risk of heart disease and cancer, and, for an added bonus, put you in a better mood. Did we mention that there are no side effects? You’d surely stock up on a lifetime supply. Guess what? These life-altering superfoods are available right now in your local supermarket.

"The effect that diet can have on how you feel today and in the future is astounding," says nutritionist Elizabeth Somer, author of Nutrition for aHealthy Pregnancy, Food & Mood, and The Essential Guide to Vitamins and Minerals.

"Even people who are healthy can make a few tweaks and the impact will be amazing," Somer says. "I’d say that 50% to 70% of suffering could be eliminated by what people eat and how they move: heart disease, diabetes, cancer, hypertension can all be impacted."

You don’t need specific foods for specific ailments. A healthy diet incorporating a variety of the following superfoods will help you maintain your weight, fight disease, and live longer. One thing they all have in common: "Every superfood is going to be a ‘real’ (unprocessed) food," Somer points out. "You don’t find fortified potato chips in the superfood category."

Top Superfoods Offering Super Health Protection

 

• Beans
• Blueberries
• Broccoli
• Oats
• Oranges
• Pumpkin
• Salmon
• Soy
• Spinach
• Tea (green or black)
• Tomatoes
• Turkey
• Walnuts
• Yogurt

Blueberries — Antioxidant Superfood

Packed with antioxidants and phytoflavinoids, these berries are also high in potassium and vitamin C, making them the top choice of doctors and nutritionists. Not only can they lower your risk of heart disease and cancer, they are also anti-inflammatory.

"Inflammation is a key driver of all chronic diseases, so blueberries have a host of benefits," says Ann Kulze, MD, of Charleston, S.C., author of Dr. Ann’s 10-Step Diet, A Simple Plan for Permanent Weight Loss & Lifelong Vitality. When selecting berries, note that the darker they are, the more anti-oxidants they have. "I tell everyone to have a serving (about 1/2 cup) every day," Dr. Kulze says. "Frozen are just as good as fresh." Be sure to include lots of other fruits and vegetables in your diet as well. Remember too that, in general, the more color they have, the more antioxidants.

Omega 3-Rich Fish — Superfoods for the Heart, Joints, and Memory

"We know that the omega 3s you get in fish lower heart disease risk, help arthritis, and may possibly help with memory loss and Alzheimer’s," Somer says. "There is some evidence to show that it reduces depression as well."

Omega-3s are most prevalent in fatty, cold-water fish: Look for wild (not farmed) salmon, herring, sardines, and mackerel. Aim for two-to-three servings a week. Other forms of omega 3s are available in fortified eggs, flax seed, and walnuts. These superfoods have the added benefit of being high in monounsaturated fats, which can lower cholesterol.

Soy — Superfood to Lower Cholesterol

A study reported in The Journal of the American Medical Association (2003) showed that a diet of soy fiber, protein from oats and barley, almonds, and margarine from plant sterols lowered cholesterol as much as statins, the most widely prescribed cholesterol medicine. "Look for tofu, soy milk, or edamame — not soy powder," says Somer. In other words, soy sauce won’t do the trick. One caveat: If you have a family history of breast cancer it is not recommended that you eat extra soy.

Fiber — Superfood Aids Weight Loss and Checks Cholesterol

A diet high in fiber will help you maintain healthy cholesterol and blood sugar levels. As a bonus, because fiber helps you feel full longer, it’s a great tool in weight management. Whole grains, beans, fruit, and vegetables are all good sources. Try throwing some beans in your salad, recommends Kulze. "Fresh, frozen, or dried are the best. You can use canned, but they tend to be higher in sodium," Kulze warns.

Tea — Superfood for Lowering Cholesterol and Inhibiting Cancer

"The overall antioxidant power of black tea is the same as green tea," says Kulze, "but green tea does have ECGC, a powerful antioxidant that we really do think is quite special." A recent Japanese study on green tea found that men who drank green tea regularly had lower cholesterol than those who didn’t. Researchers in Spain and the United Kingdom have also shown that ECGC can inhibit the growth of cancer cells. For a double health whammy, replace sugary sodas with tea.

Calcium

OK, OK, you know the drill: Calcium helps build strong bones and prevents osteoporosis. Look for it in dairy products or supplements. Added bonus: Some studies show that calcium helps with weight loss. Here are the calcium levels recommended for adults by the USDA:

• Age 9 to 18 — 1,300 mg
• Age 19 to 50 — 1,000 mg
• Age 51 and over — 1,200 mg

And Finally, the Yummiest Superfood Yet … Dark Chocolate

New research has shown that dark chocolate is packed with antioxidants and can lower blood pressure. Kulze recommends that you look for chocolate with 60% or higher cocoa content; the darker, the better. In addition, the darker it is, the lower the fat and sugar content. Now that’s our kind of health food!

 

South Beach Diet

 

Definition

The South Beach diet is a three-phase, carbohydrate-restrictive diet. It emphasizes foods that are low on the glycemic index (GI) and low in saturated fat, such as lean meats, vegetables, cheeses, nuts, and eggs. Unlike other carbohydrate-restrictive diets, such as the Atkins and Zone diets, the South Beach diet promotes "good" carbohydrates, such as whole grains and fruit.

Origins

The creator of the South Beach diet, Dr. Arthur Agatston, is considered a leading cardiologist and is the director of the Mount Sinai Cardiac Prevention Center in Miami Beach. Originally, he had intended to design an eating plan to improve the cholesterol and insulin levels of his patients. However, Dr. Agatston soon discovered that his patients also lost weight on his plan. After further research, he approached Marie Almon, R.D., chief clinical dietician at the hospital, to help develop the eating plan into an effective diet. The results became the South Beach diet. Having sold more than a million copies since its publication in April 2003, The South Beach Diet book has remained on the New York Times bestseller list for over a year.

Benefits

The primary benefit of the South Beach diet is considered by many to be its initial rapid and significant weight loss—8–13 lb (4–6 kg) in the first two weeks. After the first two weeks, weight loss continues at a slower rate, averaging 1–2 lb (0.4–1 kg) weekly. In addition to weight loss, the diet reduces cholesterol and insulin levels, thus reducing the risks of diabetes and heart disease. It is claimed that the diet is easy to follow because it is designed to eliminate cravings and has more flexible food options after the first two weeks.

Description

In his book, The South Beach Diet, Dr. Agatston states that "this diet is not low-carb. Nor is it low-fat." Instead, the diet focuses on eating the "good" carbohydrates (fruits, vegetables, and whole grains) and "good" fats (olive oil and nuts) rather than eliminating them from the diet entirely.

Dr. Agatston based the core of his dietary plan around the glycemic index –the increase in blood sugar levels by foods containing carbohydrates during a set amount of time.

After consumption, food is metabolized into sugars and promotes the release of the hormone insulin. When the blood contains excess sugar, insulin removes it from the blood stream by storing it in cells, including fat cells. High-glycemic carbohydrates (greater than 70 GI) are metabolized rapidly, which causes elevated insulin production. High levels of insulin result in more blood sugar being stored as fat, thus causing weight gain. This pattern induces craving for more carbohydrates, thus leading to the consumption of more high-GI foods. Low to moderate-GI foods, however, raise insulin levels more slowly and sugars are metabolized more effectively, thus reducing the amount of blood sugar stored as fat. Cravings for more food is reduced. In addition, by eating these low-GI foods, the risk of insulin resistance that can lead to atherosclerosis and diabetes is reduced. As such, Dr. Agatston designed the South Beach diet to promote foods low on the GI and eliminate the body’s craving for high-GI foods.

The South Beach diet consists of three phases. Phase one is the strictest part of the diet and lasts for two weeks. The purpose of Phase one is to banish the dieter’s cravings for high-GI foods such as bread, rice, potatoes, pasta, and sugar. Alcohol, fruits, cereal, and such vegetables as carrots and corn are also restricted during Phase one. Instead, protein-rich foods are emphasized, such as lean meat, fish, eggs, cheese, nuts, and vegetables. Coffee and tea are also allowed. Three regular-sized meals are eaten each day, supplemented by mid-morning and mid-afternoon snacks as well as dessert. During this period, the body chemistry will change dramatically until cravings for high-GI foods are eliminated and insulin resistance is improved/lowered. In addition, rapid weight loss is typically experienced.

Phase two reintroduces several of the restricted foods and encourages eating from all the dietary food groups, the expected result being that the body will neither crave high-GI foods nor store food as excess fat to the same degree. Such high-fiber carbohydrates as whole-wheat pasta and bread and most fruits are now permitted. Moderation remains the key to success for this phase and low-GI foods are strongly encouraged. Phase two continues until the dieter reaches his or her ideal weight, ideally averaging a loss of one to two pounds per week.

Phase three, the ultimate goal, focuses solely on weight maintenance. Having reached the ideal weight, the dieter now makes the changed eating habits a lifestyle from this point forward. Basic dietary techniques are still maintained. Only the high-GI foods and "bad" fats from the previous two phases continue to be restricted. Altered body chemistry will promote long-term cardiovascular health and reduce the risk of diabetes. Should weight gain occur, Phase one of South Beach diet is reintroduced until the weight goal is achieved.

Preparations

There are no initial preparations required for the South Beach diet. However, as with most diets, it is wise to consult with a physician beforehand. Blood testing for insulin, glucose, and cholesterol levels is suggested. It is strongly recommended that dieters taking medications for medical conditions such as heart disease consult a physician before going on the South Beach diet. Similarly, diabetics on insulin or other medications are advised to have a doctor monitor their blood sugar regularly and determine if they are at risk of kidney impairment while on the diet. It is also recommended that a registered dietitian be consulted to determine the dietary needs of certain medical conditions, such as pregnancy.

Precautions

The South Beach diet is not recommended for people suffering from or at risk of kidney problems. The diet’s high protein content can place increased strain on the kidneys, possibly causing long-term damage as well as kidney stones and bone loss. Additionally, the possibility of ketosis-induced dehydration during Phase one can increase the risk of further kidney impairment. Dehydration occurs when the body experiences water loss with accompanying loss of important blood salts like potassium and sodium. Ketosis occurs when carbohydrates are not available and the body burns an excessive amount of fat, during which some ketones, or fat fragments, are excreted. The restrictive nature of Phase one may also induce mineral and vitamin deficiencies. Remaining in Phase one of the diet for longer than two weeks greatly increases the risk of losing bone and muscle mass. Dieters should remain in Phase one for no longer than three or four weeks.

Some nutrition professionals contend that the South Beach diet menus provided in the book lack important nutritional information and detailed portion sizes as well as specific substitutes for foods the dieter cannot or will not eat. They claim that these aspects, combined with the restrictive nature of the diet, can make sticking with the South Beach diet on a long-term basis difficult for some people. Also, they assert that the diet does not emphasize an exercise regimen and that exercise is vitally important to avoid the loss of muscle and bone mass, especially during Phase one of the diet.

Side Effects

Despite Dr. Agatston’s claims to the contrary, the South Beach diet is both a low carbohydrate and a low fat diet. For this reason, one main concern regarding the diet is the risk of ketosis, especially during Phase one. Ketosis can cause such symptoms as dehydration, dizziness, heart palpitations, fatigue, lightheadedness, and irritability. Hypoglycemia, low blood sugar, headaches, and excessive fluid loss are also commonly associated with this diet. Cramping and tired muscles can be incited by salt depletion. Kidney functions can be impaired, possibly leading to serious health issues. Kidney function can be further impaired by the diet’s high protein requirements. These side effects typically lessen or fade at the beginning of Phase two, when a more balanced diet is undertaken.

Research & General Acceptance

Unlike the majority of low-carbohydrate diets, the medical community generally accepts the South Beach diet. The South Beach diet contains all the major food groups, promotes ingestion of "good" fats for maintaining heart health, and is flexible enough to accommodate most dietary needs.

However, many clinicians and dietitians agree that the rapid initial weight loss results mostly from water loss. Much of this weight can return once the dieter rehydrates.

Another important criticism by medical and nutritional professionals is the lack of evidence to support Dr. Agatston’s claims connecting the consumption of low-GI foods and weight loss. They assert that as of the early 2000s, there is no scientific proof that eating low-GI foods will have any more weight loss effect than eating a normal, calorie-reduced diet that includes carbohydrates; that Dr. Agatston also fails to take into account the interaction of different foods when eaten together, which can dramatically alter glucose metabolism; and that this failure means that utilizing the Glycemic Index as a gauge for what foods to eat is not only confusing but also slightly misleading.

Can I lose belly fat or have a flat belly by starving and not exercising?

 

No, you cannot get a flat stomach by starving yourself. Semi-fasting long term can mess up your metabolism and cause all sorts of health issues. The longer you go, the more problems, sometimes not reversible, will occur. Your belly is likely to balloon out in the final stages of starvation and the internal organs start to shut down.

A well balance diet and sensible exercise will do it. However, you must remember, you did not gain that weight in a day, or a week or even a month. It can take as long to lose it as it did to gain it. Think long-term health, not short term looks.

Instead of starving yourself start eating healthier. Eat smaller meals, eat more meals a day, eat more vegetables and fruit, drink more water, less sugars and empty calories (less soft drinks, cakes, cookies). Switch to whole-wheat versions of your bread and pasta, brown rice instead of white rice.

Losing or maintaining an ideal weight is not a difficult task if you follow a healthy lifestyle including low GI eating, regular aerobic exercise and suitable supplements. Whatever you do, do not starve yourself. Talk to a doctor or a family member. You need to lose body fat if your BMI is over 25. Excess body fat, or obesity, will affect not only your appearance but also your health and can lead to heart disease, diabetes, and more.

Nutrition is important. In the pursuit of a flatter stomach, many people diet or starve themselves. Little do they know that by starving themselves, they are slowing down their metabolism and forcing their body to go into starvation mode as a defence mechanism.

How Do You Reduce A Fat Belly?

 

Is a Fat Stomach Unhealthy?

Yes. For people with a BMI of 34 or less, a fat belly is regarded as an additional health risk. Fatty tissue which is stored around the stomach and abdomen (sometimes called intra-abdominal, or visceral fat) carries a greater health risk than fat located in the lower body around the butt and thighs. Some health studies show that abdominal fat leads to raised blood pressure, high cholesterol levels, high blood sugar, insulin resistance syndrome (metabolic syndrome X) and heart disease. Because of this, some experts believe that waist circumference and fat-distribution is more important than your actual weight in predicting future health risks.

 

What Causes a Fat Belly?

Where we store fat (surplus calories) is largely a combination of gender, age and genetic inheritance. Men tend to store fat around their middle (apple shape), whereas women typically store fat around the pelvic region, hips, butt and thighs (pear shape). However, women are prone to develop an apple shape in mid-life, after menopause. This is because the female hormones are present in smaller amounts and so their shape tends to become more ‘male’.

NOTE: To understand how surplus food calories from carbohydrate, fat or protein are converted to body fat and stored in adipose tissue cells, see How We Gain Body Fat (Adipose Tissue)

Stress and Stomach Fat

Some health studies show that abdominal fat can develop as a result of stress. This is because the hormone cortisol is released during stress, and a high level of cortisol in the body appears to stimulate the storage of fat around the belly and abdomen. Researchers at Yale University studied 60 women and found that the more stress they were under, the more fat they stored around their stomachs. So it appears that a fat belly is most likely to develop in stressed men of any age, and older stressed women.

How to Prevent a Fat Belly?

If you are prone to store fat around your middle, the healthiest solution is to maintain a normal weight. By matching your calorie intake to your calorie needs and prevent weight gain, you will prevent the development of any excess fat.

How to Reduce a Fat Stomach?

However, if you already have a fat belly, the best option is to follow a healthy weight loss diet, combined with fitness exercises such as aerobics (to burn extra calories) and a stomach-toning workout to help tighten and strengthen abdominal muscles. That said, reducing a fat stomach takes time – especially if you are an apple-shape. Despite what commercials say, there is no diet-plan or type of exercise that can "target" your fat stomach. So please don’t get impatient. Your fat belly will disappear, I promise.

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