Table 1. Measures of body size and composition of juvenile (4- to 5-wk-old) and adult (12- to 14-wk-old) mdx and control mice.

Group	Juvenile		Adult		P
	mdx	Control	mdx	Control	A×G	A	G
N	8	8	12	10
Body Composition
Weight (g)	16.5±0.7*	21±0.7*	29.1±0.6	28.6±0.6	<0.001	<0.001	0.03
FFM (g)	14.6±0.4*	18±0.4*	27.5±0.3*	23.7±0.4	<0.001	<0.001	NS
Fat (g)	1.96±0.44	2.3±0.44	2.16±0.36	4.95±0.39*	0.005	0.001	<0.001
(% BW)	11.9±1.2	11±1.2	7.3±1.0*	16.8±1. 1*	<0.001	NS	<0.001
Lengths
Body (mm)	77.7±0.4*	83±0.4*	96.7±0.3	96.3±0.4	<0.001	<0.001	<0.001
Femur (mm)	12.6±0.1*	13±0.1*	16.1±0.1* 1	15.7±0.12	<0.001	<0.001	NS
Tibia (mm)	15.5±0.1*	16±0.1*	18.3±0.1* 1	17.9±0.12	<0.001	<0.001	NS

FFM, fat-free mass. Values are means±SE.

¹n = 8;

²n = 7,

*significantly different from all groups.