Table 4. Changes in muscle fibre type composition of vastus lateralis, after 6 weeks of Strength or Power training. Data are means (SE).
|
Strength Group (n = 9) |
Power Group (n = 8) |
|
Pre |
Post |
Pre |
Post |
| Type I CSA (μm2) |
4485 (26) |
5267 (24) * |
4869 (35) |
5418 (27) |
| Type IIa CSA (μm2) |
5560 (37) |
6645 (33) * |
5115 (37) |
5907 (30) |
| Type IIx CSA (μm2) |
4382 (34) |
5371 (35) # |
3861 (37) |
4858 (30) # |
| Type I CSA (%) |
44.5 (3) |
46.0 (3) |
49.6 (3) |
49.8 (2) |
| Type IIa CSA (%) |
42.5 (3) |
47.0 (3) |
40.3 (2) |
41.4 (2) |
| Type IIx CSA (%) |
13.0 (2) |
7.0 (2 )† |
10.1 (3) |
8.8 (2) |
* p < 0.005,# p < 0.05, significant difference between pre and post.† p < 0.01, significant difference between pre and post
