I have heard that heavy exercise can hinder fertility... I'm in the 2nd month of the Turbo Fire program and my lower back has been hurting since my last cycle... about 4 weeks now... but ive been pushing on. I have heard reciently that a heavy exercise program can actually hinder fertility but i don't know if that's true. I wonder if it shakes the sperm away from the egg? Anyone know? I'm wondering if i should take a week off?