Table 3.
Means ± SE skeletal muscle morphology and glycogen stores
| Wtinitial | Wt−10% | Wtinitial | Wt+10% | |
|---|---|---|---|---|
| % type I fibers | 37.5±2.4 | 33.4±2.5 | 35.2±6.0 | 35.8±4.2 |
| % Type IIA fibers† | 38.5±2.3 | 36.7±3.3 | 38.6±3.9 | 31.3±3.7 |
| % Type IIX fibers† | 20.5±2.8 | 24.1±7.3 | 21.0±7.8 | 24.7±5.0 |
| type I cap. dens. | 4.4±0.1 | 4.3±0.2 | 4.1±0.4 | 4.1±0.3 |
| Type IIA cap. den. | 4.2±0.2 | 4.3±0.2 | 4.0±0.2 | 4.1±0.1 |
| Type IIX cap. den. | 3.5±0.2 | 3.5±0.2 | 3.5±0.2 | 3.5±0.3 |
| Total glycogen, μmol/g | 116.9±5.2 | 115.7±5.0 | 121.2±13.3 | 116.6±16.1 |
| Proglycogen, μmol/g | 80.5±3.8 | 76.1±2.4 | 88.7±10.9 | 81.4±10.6 |
| Macroglycogen, μmol/g | 36.3±2.2 | 41.2±2.3 | 32.2±2.7 | 35.1±6.2 |
| %Proglycogen | 68.9±1.3 | 66.6±1.8 | 72.9±0.9 | 70.1±1.8 |
Means ± SE measures of skeletal muscle morphology and glycogen content. A total of 30 subjects (18 obese, 7 never-obese; 12 males, 13 females) were studied at Wtinitial and Wt−10%. A total of five subjects (4 never-obese males; 1 never-obese female) were studied at Wtinitial and Wt+10%.
†
Intermediate fiber types (such as IIC and IIAX) were found to represent only a few percent of all fibers, and no differences between groups were found in their proportion, size, or capillary density (data not shown).