Table 2. Proportion of myosin heavy chain (MHC) isoforms (%) before and after a 54-week strength and power training program in the training and control groups. Values are means (± SD).
MHC isoforms (%)
Groups
Before
After
MHC I
MHC IIa
MHC IIx
MHC I
MHC IIa
MHC IIx
Training group (n=16)
29.1 (13.3)
52.6 (12.2)*#
18.1 (11.4)#
29.4 (10.9)
59.4 (11.6)
11.1 (9.1)*
Control group (n=6)
22.8 (14.9)
70.2 (17.2)
6.8 (10.9)
25.8 (21.0)
67.3 (20.6)
7.0 (13.0)
* p < 0.05 in comparison with pre-training period,