Figure 1.

Whole heart apoptosis 24 h after exercise. Temporal apoptosis, as measured through cleaved PARP, was significantly increased 24 h postexercise and recovered to sedentary control levels following this time point. RV, right ventricle; LV, left ventricle; Control, sedentary control; 0, exercise animals sacrificed immediately after exercise; 8, exercise animals sacrificed 8 h postexercise; 24, exercise animals sacrificed 24 h postexercise; 48, exercise animals sacrificed 48 h postexercise; 72, exercise animals sacrificed 72 h postexercise (*P ≤ 0.05 from sedentary control).