Table 1.
Descriptive variables for body mass index (BMI) classifications in both the young (upper section) and old (lower section) age classifications.
| Underweight | Normal | Overweight | Obese | BMI effect | Aging effect | |
|---|---|---|---|---|---|---|
| n | ||||||
| Young | 13 | 12 | 8 | 16 | ||
| Old | 4 | 14 | 16 | 11 | ||
| BMI (kg/m2) | ||||||
| Young | 18.8 ± 0.9 | 21.6 ± 1.1 | 27.8 ± 0.7 | 35.2 ± 4.5 | P < 0.001 | |
| Old | 19.1 ± 0.8 | 22.2 ± 1.0 | 27.4 ± 1.2 | 34.1 ± 5.7 | P < 0.001 | P = n.s. |
| %Body fat | ||||||
| Young | 26.5 ± 3.9 | 30.1 ± 3.5 | 37.7 ± 5.8 | 45.5 ± 4.1 | P < 0.001 | |
| Old | 26.5 ± 2.1 | 35.6 ± 3.4 | 43.3 ± 2.8 | 46.1 ± 5.0 | P < 0.001 | P = 0.002 |
| Aging slope intrinsic strength (Nm/V.year−1) | 0.028 (P = n.s.) | −0.347 (P = n.s.) | −0.261 (P < 0.01) | 0.085 (P = n.s.) | ||
| Aging slope‐specific force (N/cm2.year−1) | 0.028 (P = n.s.) | −0.002 (P = n.s.) | 0.045 (P = n.s.) | 0.194 (P = n.s.) | ||
Data are presented as mean ± SD. Rate of aging per BMI classification is also shown (data are presented as regression slope and P value for the degree of association).