What would be better to get in shape for rugby/mma?

Next fall semester i plan on trying out for the rugby team and if i dont make that i will start mma.
I havent done much in terms of exercising this semester other than going to the gym a few times a week pretty inconsitatnly to run.

Basically i planned on doing a body builder type workout for a month over winter break just to kind of get back into lifting and such and then planned on doing either mark ripptoes starting strength or the stronglifts program once i got back to school.
for my winter break workout it is monday wednesday friday lifting (monday and friday are upper body and wednesday is lower) stuff like curls and pulldowns and stuff like that. this is just to get back into lifting somewhat into better shape. i know its mostly superficial type exercises for bigger arms. i just dont have the equipment to do the good stuff like deadlifts and squats. and then tuesday and thursday i planned on running.

however my friend just showed me this crossfit stuff she does and it looks real legit and i want to somehow incorporate it.

my question is what would be better…focusing on getting bigger by mostly lifting weights or doing crossfit in which i will be lifting weights and running and all sorts of stuff that will make me hate my life.

WOD 3 Heat 7 CrossFit Velocity Games

WOD 3 at the CrossFit Velocity Games www.crossfitvelocity.co.uk 21 Deadlifts 100kg 21 HSPU 15 Thrusters 40kg 15 Pull Ups 9 Squat Cleans 60kg 9 Muscle Ups Developing Natural Abilities at CrossFit Central Manchester www.crossfitcentralmanchester.co.uk

WOD 3 Heat 3 CrossFit Velocity Games

The 3rd Workout at CrossFit Velocity Games in November 2009. Heat 3 www.crossfitvelocity.co.uk 21 Deadlifts 100kg 21 HSPU 15 Thrusters 15 Pull ups 9 Cleans 60kg 9 Muscle Ups Developing Natural Abilities at CrossFit Central Manchester www.crossfitcentralmanchester.co.uk

How is this idea for cross country training?

I’m a cross country runner, and this is an idea I have for training, tell me what you think of it. Ok, well to start off the focus of my training is to improve my muscular, not cardiovascular, endurance. I have absolutely fantastic cardiovascular endurance, and the only thing preventing me from running faster times is that my muscles just get wasted after a while and I can’t keep the pace of my first half. Again, its not cardiovascular, as I can hold my breath, have a conversation, all of it and during a race. And still get great times. So, to improve my musuclar endurance, my idea is to , staring today, do stairs at absolute max, 5, up and down, at a time (its about a hundred steps up). Then do Stassi Squats, and repeat until I am absolutely beyond exhausted. I feel that if I can continue this for a few weeks, perhaps my muscles will be able to keep up with cardiovascular endurance, and I’ll be able to run much faster. Any comments, advice, and the like would be appreciated.
First person says that’ll build cardiovascular, which is true, but won’t going up stairs also build muscular endurance? What can I do to as quickly as possible strengthen that?