Out of Shape

I seriously need to excercise more. I went biking for a half an hour this morning and my legs already feel rubbery, and part of the distance was downhill too. But I guess I also went uphill alot so that makes me feel a little better. I think I'll try biking everyday, everyone always says that exercising releases endorphins (sp?) and I do feel alot more relaxed after biking. The unfortunate part is I still have to spend at least two hours playing sports with kids during volunteering and unless I somehow magically erase the soreness of my limbs in a few hours, I'm going to be so dead.