Understandably. However, I challenge everyone to do some workouts in the heat this summer. Nothing too stressful, but a bike ride, short jog or a good swim are all good choices.
Couple things to keep in mind:
HYDRATE. Drink water before you go out and keep some on hand while you're outside.
Take lots of breaks. Your goal is to be uncomfortable but not near death, obviously. If you feel light headed, STOP. If you stop sweating, STOP! Be smart and listen to your body!
Working out in uncomfortable situations (i.e. cold, heat etc) help push your body past it's normal limits when done in moderation.
Again, be smart, but don't be afraid of getting SWEATY!
