Table 1.

Mean body mass and muscle mass for young and old rats

	Young (n = 7)	Old (n = 7)
Body wt (g)	379 ± 8	438 ± 9*
Soleus wt (mg)	141 ± 6	148 ± 6
Soleus wt/body wt (mg g−1)	0.37 ± 0.01	0.34 ± 0.02†	(P = 0.06)
Gastroc. wt (mg)	1579 ± 57	1482 ± 43†	(P = 0.09)
Gastroc. wt/body wt (mg g−1)	4.17 ± 0.10	3.39 ± 0.10*

^*P < 0.05 versus young

^†P < 0.10 versus young. Gastroc., gastrocnemius; wt, weight.