I was on the crew team for a semester (one of the toughest sports I can think of)

I rowed in college for a couple years, and you ain't kiddin', practice for rowing has to be the most work of any sport. Running up and down those stadium seats for 45 mins. straight was not fun. But it sure did keep me in shape. My grilfriend at the time was a nutrition major and did a study on me involving recording every 15 mins. what I ate and what activities I did. At the end of the week long study the results showed that I was eating 6000 calories, 3000mg of salt, 150 grams of fat PER DAY, and still I was negative 300 calories/day. wow. I guess thats what running around for 5 hours every day will do to you.