Table 2.
Percentage muscle fibre composition and area by histochemistry and percentage myosin heavy chain (MHC) composition from electrophoretic analysis
| Type I | Type IIa | Type IIx | |
|---|---|---|---|
| % | |||
| UT | 36.8 (2.5) | 35.7 (5.6) | 27.7 (3.6) |
| Pre-T | 35.1 (4.1) | 39.5 (3.0) | 27.1 (3.3) |
| Post-T | 37.4 (2.7) | 44.3 (2.9) | 23.4 (2.7) |
| % area | |||
| UT | 30.7 (4.5) | 41.5 (4.8) | 27.8 (4.3) |
| Pre-T | 33.4 (5.1) | 39.5 (3.5) | 27.1 (2.6) |
| Post-T | 30.3 (3.3) | 45.3 (3.0) | 24.4 (2.5) |
| % MHC | |||
| UT | 32.7 (4.5) | 42.7 (4.8) | 24.6 (4.3) |
| Pre-T | 34.1 (5.1) | 40.7 (3.5) | 25.2 (2.6) |
| Post-T | 32.6 (3.3) | 46.2 (3.0) | 21.2 (2.5) |
Values are means (s.e.m.), n = 8 per cell %, histochemically determined percentage of fibres by composition; % area, percentage of total fibre area occupied by fibre type; % MHC, percentage of total myosin heavy chain for by fibre type; UT, untrained; Pre-T, pre-training in trained leg; Post-T, post-training in trained leg.