@liuetenant - Is this about maintaining good general health or improving fitness?
BOTH! i like keeping fit in general so i do as much as i can. but i dnt want to compromise on my studies too! :O
^ and at above....LOL...maybe i shoulda moved it to PE forum 
Ah okay it's awesome that you're worried about this kind of stuff. As some people have said, you can sort of use it as a break, and a constructive one. There are heaps of studies supporting exercise in improving morale, sleep etc. You'll find that you should be able to fit it in and after you're back and have had a rest, you'll probably be alert and ready to study.
Although I struggled to keep up my normal frequency, I was still able to go to the gym 2-3 times a week, as well as playing sport at lunchtime and having a hit of tennis every few weeks. It's just about enjoying the exercise while you're at it then having meaningful studying sessions and not wasting time.
You can also find some novel ways to fit it all in - e.g. riding your bike to school. Good luck and fitness > study (sorry VNers)
