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Skeletal muscle fiber characteristics before and after 16 wk of resistance exercise training in young men
| Fiber Type | Pre | Post | |
|---|---|---|---|
| Fiber area, µm2 | I | 5,621 ± 409 | 6,263 ± 413# |
| II | 5,771 ± 381* | 7,725 ± 519*# | |
| Fiber perimeter, µm2 | I | 294 ± 9 | 309 ± 11# |
| II | 319 ± 10* | 359 ± 18*# | |
| Fiber type distribution, fiber % | I | 33 ± 3 | 38 ± 2 |
| II | 67 ± 3* | 62 ± 2* |
Values are means ± SE.
Significant difference between fiber types (P < 0.05);
significant effect of exercise training (P < 0.05).
