Table 1.
Muscle phosphocreatine (PC), ATP, and inorganic phosphate concentrations
| PC | ATP | Pi | ||||
|---|---|---|---|---|---|---|
| Rest | Stimulation | Rest | Stimulation | Rest | Stimulation | |
| Sedentary | 22.8 ± 0.9 | 14.8 ± 1.2 | 5.8 ± 0.16 | 5.43 ± 0.26 | 2.09 ± 0.12 | 19.2 ± 1.3 |
| Exercise, 1 day | 22.6 ± 0.7 | 14.0 ± 0.8 | 6.19 ± 0.19 | 5.67 ± 0.20 | 2.24 ± 0.13 | 20.2 ± 1.3 |
| Exercise, 3 days | 24.1 ± 0.8 | 15.8 ± 1.2 | 6.11 ± 0.19 | 5.67 ± 0.14 | 2.52 ± 0.17 | 19.7 ± 1.5 |
Lack of effect of one or three bouts of exercise training on the decreases in phosphocreatine (PC), ATP and inorganic phosphate (Pi) in muscles stimulated to contract for 3 min. Values are expressed as μmol g (muscle wet weight)−1 and are the means ± SEM for 12 to 14 muscles per group.