Power of Protein

Jennifer Hutchison asks how much protein a triathlete really needs.

How much protein does a triathlete need? Is protein in a sports drink really necessary?

These two questions can spark a firestorm of debate amongst sports nutrition professionals, nutrition savvy athletes and sport nutrition manufacturers that promote products packed with a protein punch. This month I will discuss the third macronutrient that provides balance and protection in an athlete’s diet, protein.

Protein Basics
Dietary protein, like carbohydrate and fat, performs a very important job in an athlete’s diet. Protein’s primary role in the body is to support growth, maintenance and repair of muscle and other body tissues, while also being a backbone for many hormones and enzymes and supporting a healthy immune system. An athlete’s overall health and performance can be closely tied to protein balance. Protein intake that is insufficient can place the athlete at risk for illness and or injury.

Body proteins are constantly being broken down and resynthesized on a daily basis both at rest and during training. Protein, although not a preferred fuel source, can be used to sustain physical activity. Gluconeogenesis is the body process that breaks down protein (think muscle) and converts it to carbohydrate (glucose) to be used as fuel.

Dietary protein’s main purpose should be for the repair and recovery of damage muscle and cells caused by training and racing as opposed to being used as a fuel source. In order to do this athletes must ensure that they are already meeting both their daily calorie and carbohydrate needs which have been addressed in previous articles.

Building Blocks
Protein is synthesized from amino acids (the building blocks of protein). There are 20 different amino acids (AA) that, in various combinations, create the different types of protein. What makes a particular protein source unique is how these AAs are combined.

There are two major categories of AAs: Essential and Nonessential.

Essential AAs cannot be made in the body therefore they must be supplied by the diet.
The essential AAs are Histidine, Isoleucine*, Leucine*, Lysine, Methionine, Phenylalanine, Threonine, Tryptphan and Valine*

Food sources that contain all of the essential AAs are commonly referred to as “complete” proteins. These foods include animal proteins such as meat, fish, dairy products and eggs.

Side note: (BCAA) Branch chain amino acids (denoted with the * above) are essential AAs of interest to many endurance athletes as they are thought to play a role in mental “strength” and delaying fatigue. BCAAs are stored in the muscle and can be used as fuel during long training days and for 70.3 to Ironman races,particularly if carbohydrate intake falls short.

In theory, BCAAs supplementation (in the form of protein containing sports drinks) seems to make sense, but there is very little solid research which confirms a performance benefit. Consuming sports drinks with protein is not harmful. The biggest subjective issue I have encountered with Ironman athletes is taste. Sports drinks containing protein do not taste so swell after a few hours roasting in the heat. If an athlete is not keen on the taste of their sports drink, they most likely will not drink enough, which can be problematic on race day!

So the burning question: is a protein containing sports drink really needed during endurance training? The answer is no. With that said, I do know of many athletes who swear by their carb/protein potion. So as they say “if it ain’t broke, don’t fuss with it”.

Nonessential amino acids are just as important as essential AAs with the difference being these AAs CAN be made by the body and do not have to come from the diet. Nonessential AAs s are Alanine, Arginine, Asparagine, Aspartic acid, Cysteine, Glutamine, Glutamic Acid, Glycine, Proline, Serine and Tyrosine.

Food sources that may be lacking in one or more of the essential AAs is referred to as “incomplete” proteins. All plant sources of protein (beans, legumes, whole grains, vegetables, nuts and seeds) with the exception of soy are considered incomplete.

Athletes that choose to follow a plant based (vegetarian) training diet should include soy products and incorporate variety in selecting beans/ legumes, whole grains and vegetables. Protein needs CAN be met following a vegetarian diet but these athletes have to ensure they compliment their grain choices with their meat alternative choices so that all the AAs are being supplied over the course of the day.

Protein Requirements
In spite of popular belief, endurance athletes can meet their protein needs without tons of dietary supplements.

The keys to meeting protein needs are 1) knowing how much protein to aim for 2) learning more about the protein content of various foods and 3) planning meals … which can be easier said than done!

Athlete protein needs are based on lean body weight (preferred over total body weight), the type of training (strength/power vs. endurance) and phase of training (base/ build/peak/race). Athletes new to physical training, in general will have a slightly higher protein need than those athletes who have more training experience.

The average athlete may only need the recommended 0.8 gm protein per kilogram body weight per day.

However the very nature of preparing for the 70.3 and Ironman distances will most certainly require a bit more to mend a body battered from 12 to 20+ weekly training hours.

The chart below can be used as a guide to estimate daily protein needs based on the daily training volume. It would be fair to say that athletes who have shorter, more intense, workouts which produce some degree of muscle damage (i.e. muscle soreness) may benefit from that next higher level of protein intake.

Daily Training	Grams per pound body weight	Grams per kilogram (kg) body weight
Up to 60 min per day	0.5	1.1
Between 1 to 2 hours	0.6	1.3
Between 2 to 3 hours	0.7	1.5
Greater than 3 hours	0.8	1.8

 

More is not better
Most athletes with a well balanced diet can easily meet their daily protein requirements. It is a common practice for some athletes to over consume protein believing this in turn will help boost lean body mass. The truth is that the body does not store excess dietary protein as muscle. Once dietary protein has fulfilled its role the excess is broken down and goes to be used as fuel, stored as body fat or excreted by the body via urine.

Protein content of various foods
Oils – none
Fruit- minimal
Grains- 3 grams per serving (1 sl bread, ½ c rice or pasta)
Nuts – 5 grams per 1 oz
Milk/Dairy/ Milk Alternative- 5 to 8 grams per serving (8 oz milk, 6 oz yogurt, 1 oz cheese) Cottage Cheese- 14 grams per ½ cup
Beans – 7 to 8 grams per ½ cup
Meat Alternative/ Soy – 16 to 20 grams per ½ c ( tofu, tempeh) 1 Egg – 7 to 9 grams
Meat – 21 to 27 grams per 3 oz cooked (beef, chicken, turkey, fish, pork)

How much is a portion? For most normal size athletes, the inside diameter of your hand and thickness of your palm is your rough guide to a meat portion appropriate for you.

Nutrition tips for meeting daily protein needs:

Include a protein containing food at every meal and every post workout snack.

To optimize the recovery process, target 10-20 grams of protein (along with the carbohydrate source) in post workout snacks.

Breakfast Ideas
· High protein cereal (ex: Kashi Go Lean), low fat dairy/soy (milk, yogurt)
· Scrambled egg white omelet w/ low fat cheese
· Add 1 scoop soy/ whey protein isolate powder to your hot cereal
· Use milk or soymilk instead of water for hot cereal.

Lunch Ideas
· Turkey/ Tuna/ Chicken Wrap, Beans & Rice, Bean Burrito
· Add part skim mozzarella cheese, crumbled tofu or chickpeas to salads
· Eating out? Request double meat on your sandwiches.

Dinner Ideas
· Tofu Stir Fry w/ Brown Rice, All Bean Chili w/ Rice
· Grilled Chicken, Lean Beef, Pork, Baked Fish with Potatoes or Pasta
· Quinoa and Black Beans served with shredded lowfat soy cheese

Snack Ideas
· Low fat Cheese, Cottage Cheese, Low fat Yogurt with fruit
· Chocolate Milk, Smoothie made w/ Soymilk
· Whole Grain Toast/ Muffin with Peanut or Almond butter

Adequate daily protein is crucial for athletes to maintain a strong, healthy and powerful body. Knowing what your daily needs are is one thing, but knowing you are consuming adequate protein on a daily basis is another. Make use of the many good online resources and lists that can be found that identify the quantity of protein contained in various foods and track your daily intake of not only protein but also carbohydrate and fat as previously discussed in the past couple Ironman.com nutrition articles. If all the numbers and calculations leave you with a headache then consider adding a sports dietitian to your personal performance enhancement team. The use of a qualified sports nutrition professional, like that of a skilled endurance coach can help you take the guess work out of your daily and weekly eating plan and allow you to focus on what most Ironman and 70.3 athletes enjoy the most……..train, eat, sleep and race.

Jennifer Hutchison, RD, CSSD is Board Certified as a Specialist in Sports Dietetics, a USA Triathlon Certified Level 3 Elite Coach. As a Registered Dietitian, Jennifer uses her academic training, certifications and “real world” experience to help fuel athletes worldwide. You can direct comments, questions or suggestions for further articles to Jennifer via email to eSportsRD@aol.com or go to www.IronCladCoaching.com . References available upon request.