Table 1.

Body, muscle, and fat pad weights of non-trained and trained Mstn^+/+ and Mstn^−/− mice.

	Mstn+/+		Mstn−/−
Body/Tissue Weight	Non-trained	Trained	Non-trained	Trained
N	15	14	14	14
Body mass (g)	31.2 ± 0.7	30.1 ± 1.0	34.6 ± 0.5	33.5 ± 0.4
Triceps (mg)	144.9 ± 3.6	*135.1 ± 2.3	312.6 ± 4.8	*294.3 ± 6.7
Pectoralis (mg)	156.9 ± 3.7	*144.2 ± 2.8	340.5 ± 11.4	320.1 ± 8.5
Quadriceps (mg)	220.4 ± 4.8	208.4 ± 4.2	421.1 ± 6.8	†396.0 ± 8.5
Gastrocnemius (mg)	137.8 ± 2.5	130.5 ± 3.6	265.0 ± 4.4	†247.5 ± 4.8
Plantaris (mg)	18.3 ± 0.6	16.8 ± 0.5	35.5 ± 0.5	*32.0 ± 1.5
Tibialis anterior (mg)	49.8 ± 1.1	46.5 ± 1.0	92.9 ± 1.5	89.5 ± 1.7
Soleus (mg)	9.3 ± 0.5	9.8 ± 0.5	14.9 ± 0.5	14.4 ± 0.7
Retroperitoneal fat (mg)	145.8 ± 23.8	192.9 ± 22.9	60.5 ± 9.7	70.6 ± 6.2
Gonadal fat (mg)	423.1 ± 52.5	520.3 ± 52.9	222.6 ± 17.0	230.5 ± 19.7

For all muscle and fat pad weights, Mstn^+/+ tissues are significantly different from Mstn^−/− tissues (P < 0.01).

Values are mean ± SEM.

^*P < 0.05,

^†P < 0.01, non-trained versus trained mice within a genotype