Table 1.

Body weight and citrate synthase activity in the vastus lateralis red muscle

	Young Sed	Young Ex	Old Sed	Old Ex
Body weight, g	391±9	353±8a,c,d	425±12a	402±12
Citrate synthase activity; μmol·min−1·g wet wt−1	29.9±0.7	39.7±3.7a,c	25.6±1.8	38.7±3.0a,c

Values are means ± SE; n = 8–10 rats/group. Sed, sedentary; Ex, exercise trained. Significantly different from

^ayoung Sed,

^byoung Ex,

^cold Sed,

^dold Ex, P ≤ 0.05.