User blog comment:Griever0311/Ask A Marine Part Cinq/@comment-1260687-20100401015526

@Fluffylicious: I would recommend the roughest endurance training you can put yourself up to. Run as far as you can, as fast as you can pace yourself, and increase the distance a little each time. Every hundred yards or so, stop and do crunches, jumping jacks, pushups, squats; anything that will keep your heart rate up and muscles working while your legs get a few seconds of relative rest. Drink plenty of water, eat eggs and fruit in the morning, with some yogurt and fruit. Chicken and tuna sandwiches are nice and tasty and are good with veggies and fruit for lunch, and grilled chicken's good for dinner, with salad and a little bit of bread. As long as you're burning off more than you put in, you'll be straight. If you play video games, do some crunches or pushups between matches, do a set of 20 each time you go to the bathroom. You can do small things like that, and it adds up throughout the day, but you've got to make sure you're getting at least an hour to an hour and a half of good, solid cardio sometime throughout the day, and that's where the running comes in.