Table 1. Physical characteristics of older (N = 16) and young (N = 7) subjects before bed rest (Pre-BR), after bed rest (Post-BR), and after 2 weeks of physical training (Post-PT).

	Older (n = 16)			Young (n = 7)
	Pre-BR	Post-BR	Post-PT	Pre-BR	Post-BR	Post-PT	G	T	G x T
Age (y)	59.6 ± 3.4			23.1 ± 2.9			0.001
Stature (m)	1.73 ± 0.05			1.77 ± 0.07			0.192
Body mass (kg)	79.9 ± 12.3	77.5 ± 11.7	79.3 ± 11.6	74.8 ± 8.8	71.6 ± 8.3	74.4 ± 8.1	0.310	0.001	0.352
Body mass index (kg·m-2)	26.6 ±4.4	25.8 ± 4.1	26.5 ± 4.2	24.0 ± 2.4	22.9 ± 2.1	23.8 ± 2.2	0.142	0.018	0.284

Results are in mean ± SD. Significance by GLM of the main effects of Group (Older vs Young), Time (Pre-BR vs Post-BR vs Post-PT) and Group x Time interaction (G x T).