Table 2.
Parameters of cellular energy status and whole muscle AMPK activities
| Continuous | Interval | |||
|---|---|---|---|---|
| Basal | Exercise | Basal | Exercise | |
| Glycogen (nmol (mg protein)−1) | 607 ± 31 | 328 ± 22*** | 664 ± 54 | 278 ± 31*** |
| Lactate (mmol (kg dry wt)−1) | 75.5 ± 3.2 | 88.9 ± 5.7 | 69.8 ± 5.9 | 153.6 ± 7.8***### |
| Cr (mmol (kg dry wt)−1) | 29.2 ± 4.8 | 45.5 ± 4.9(*) | 25.9 ± 2.6 | 61.8 ± 4.3***## |
| PCr (mmol (kg dry wt)−1) | 58.8 ± 3.9 | 49.3 ± 3.6†† | 60.1 ± 3.5 | 31.0 ± 3.9†† |
| PCr/(Cr + PCr) (× 100) | 67.8 ± 3.5 | 52.4 ± 3.0** | 69.9 ± 2.6 | 33.4 ± 4.2***# |
| α1β2γ1 AMPK activity | 1.66 ± 0.17 | 1.42 ± 0.15†† | 1.54 ± 0.18 | 1.25 ± 0.17†† |
| α2β2γ1 AMPK activity | 0.95 ± 0.16 | 1.10 ± 0.17 | 1.00 ± 0.09 | 1.20 ± 0.22 |
| α2β2γ3 AMPK activity | 0.20 ± 0.02 | 2.59 ± 0.48** | 0.20 ± 0.04 | 5.70 ± 0.89***### |
Values are means ± SEM. **P < 0.01 vs. basal, ***P < 0.001 vs. basal, #P < 0.05 vs. CON, ##P < 0.01 vs. CON, ###P < 0.001 vs. CON, ††P < 0.01 main effect of exercise, (*)P = 0.06 vs. basal. Units of AMPK activity: pmol min−1 mg−1.