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

Table 1

The effect of age and exercise on heart and body weight in rats.

Rats	HW (mg)	BW (g)	HW/BW (mg/g)
Young ( = 10)	730 ± 60	213 ± 31	3.55 ± 0.23
Old ( = 9)	1588 ± 155*	583 ± 25*	2.98 ± 0.26*
Exercised old ( = 8)	1841 ± 14	484 ± 2	3.87 ± 0.2

Values are means ± SE. BW, body weight; HW, heart weight.
versus young rats; versus old rats.