Table 2.
Soleus phenotype of male and female LCR and HCR rats.
| F-LCR | M-LCR | F-HCR | M-HCR | Interaction | Strain | Sex | |
|---|---|---|---|---|---|---|---|
| Proportion of type I fibres (%) | 84 ± 11 | 78 ± 7 | 75 ± 15 | 80 ± 12 | NS | NS | NS |
| Cross sectional area (mm2) | |||||||
| Type I | 2560 ± 290 | 3037 ± 627 | 2674 ± 223 | 3004 ± 510 | NS | NS | 0.0589 |
| Type IIa | 1733 ± 969 | 3318 ± 711 | 1795 ± 367 | 2590 ± 572 | NS | NS | 0.0014 |
| NADH-TETRAZOLIUM reductase (OD) | |||||||
| Type I | 0.158 ± 0.03 | 0.146 ± 0.03 | 0.169 ± 0.01 | 0.192 ± 0.01 | NS | 0.0244 | NS |
| Type IIa | 0.161 ± 0.04 | 0.148 ± 0.04 | 0.187 ± 0.02 | 0.207 ± 0.01 | NS | 0.0059 | NS |
| Periodic acid Schiff's (OD) | |||||||
| Type I | 0.183 ± 0.07 | 0.179 ± 0.02 | 0.177 ± 0.02 | 0.193 ± 0.01 | NS | NS | NS |
| Type IIa | 0.187 ± 0.02 | 0.186 ± 0.08 | 0.172 ± 0.03 | 0.197 ± 0.01 | NS | NS | NS |
Data are displayed as mean ± SD (n = 5, in each group). Two-factor analysis of variance was used to calculate P values and determine statistically significant interactions and main effects for strain (HCR vs LCR) and sex (male vs female). EDL = extensor digitorum longus, F-HCR = female high-capacity runner, M-LCR = male low-capacity runner.