it's hot, plain and simple.
What's important now is to DRINK LOTS OF WATER! I've said it before and I'll say it again.....water is your friend.
According to the Food Guide Pyramid (www.mypyramid.gov) you should consume 2-3 quart of water PER DAY......that's EVERYDAY, people.
There are also guidelines concerning the amount of water you should drink before during and after your workouts. The most important one, I believe is after your workout water consumption. This is important for several reasons.
The first one being that I do believe people will listen to their bodies and drink water when they need to during their workout sessions.....the rule here happens to be 7-10 oz every 10-20 minutes.
However, after your workout it might be fun for some of you to see the dramatic weight loss you achieved after a good sweat....well....that water needs to be replaced. Losing water weight is not the goal of exercise, the goal of exercise to to get strong muscles, challenge your heart and perhaps fat loss for some....
Water loss will occur, but for a fully functioning body, you need to replace it....16-24 oz of water for every pound of weight loss after exercise.
Hydration is key....