Exercise Training Preserves Ischemic Preconditioning in Aged Rat Hearts by Restoring the Myocardial Polyamine Pool

Figure 1

Experimental protocol 1 (a) was used to subject young (Y), old (O), and exercised old rat hearts (Ex-O) to ischemia/reperfusion and ischemic preconditioning treatment. Experimental protocol 2 (b) was used to subject old rat hearts (O) to ischemia/reperfusion and ischemic preconditioning treatment.

(a)

(b)