Table 3.

Multivariate analysis to identify factors predicting changes in serum MST and FST levels.

A. MST
	Low group			Middle group			High group
	β	P-value	VIF	β	P-value	VIF	β	P-value	VIF
Sex	-0.307	0.072	1.212	0.037	0.810	1.313	0.099	0.737	1.347
Percent body fat (%)	0.460	0.071	2.684	0.204	0.153	1.132	0.227	0.520	1.897
Percent LBM (%)	0.169	0.453	2.253	-0.030	0.834	1.176	0.157	0.632	1.660
Peak VO2 (%)	-0.359	0.044	1.303	0.113	0.401	1.010	-0.111	0.690	1.193
Sitting time (min/day)	-0.055	0.781	1.751	0.192	0.172	1.103	-0.005	0.988	1.907
FST (%)	-0.461	0.017	1.462	-0.005	0.973	1.098	-0.166	0.636	1.904
B. FST
	Low group			Middle group			High group
	β	P-value	VIF	β	P-value	VIF	β	P-value	VIF
Sex	-0.420	0.018	1.079	0.044	0.776	1.312	0.282	0.202	1.204
Percent body fat (%)	0.155	0.581	3.102	0.154	0.290	1.152	-0.438	0.092	1.586
Percent LBM (%)	-0.088	0.715	2.301	-0.139	0.337	1.155	-0.120	0.637	1.661
Peak VO2 (%)	-0.266	0.175	1.450	-0.039	0.776	1.023	-0.168	0.427	1.152
Sitting time (min/day)	0.260	0.208	1.627	0.142	0.321	1.122	-0.600	0.013	1.209
MST (%)	-0.525	0.017	1.664	-0.005	0.973	1.119	-0.099	0.636	1.129

β standardize partial regression coefficient.

Sex: men = 1, women = 2.

VIF, variance inflation factor; LBM, lean body mass; VO₂, oxygen consumption; FST, follistatin; MST, myostatin.

Percent body fat, percent lean body mass, peak VO₂, FST and MST were input as percent changes before and after the program.