Table 1. Subject Characteristics.
| Young N=12 | Older N=12 | P Age | ||
| Physical characteristics | ||||
| Age (years) | 27 ± 5 | 76 ± 5 | ||
| Sex (F/M) | 6F/6M | 7F/5M | ||
| Height (cm) | 169.6 ± 3.7 | 163.7 ± 8.5 | 0.03* | |
| Weight (kg) | 69.9 ± 7.0 | 70.7 ± 12 | 0.08 | |
| BMI (kg/m2) | 24.3 ± 2.7 | 26.3 ± 2.8 | 0.10 | |
| SBP (mmHg) | 112.4 ± 11.8 | 124.2 ± 11.6 | 0.02* | |
| DBP (mmHg) | 69.9 ± 9.7 | 64.3 ± 10.5 | 0.18 | |
| Body composition | ||||
| Total body Fat (%) | 31.7 ± 7.7 | 36.6 ± 5.9 | 0.10 | |
| Fat, arms (kg) | 2.0 ± 0.5 | 2.5 ± 0.7 | 0.04* | |
| Fat, legs (kg) | 7.6 ± 2.2 | 7.8 ± 2.2 | 0.82 | |
| Fat, trunk (kg) | 10.6 ± 2.7 | 13.7 ± 5.1 | 0.08 | |
| Total lean mass (kg) | 45.5 ± 7.8 | 42.5 ± 7.3 | 0.30 | |
| Lean, arms (kg) | 5.0 ± 1.2 | 4.5 ± 1.1 | 0.31 | |
| Lean, legs (kg) | 15.6 ± 3.1 | 13.9 ± 2.5 | 0.15 | |
| Lean, trunk (kg) | 22 ± 3.6 | 21.1 ± 3.6 | 0.51 | |
| Physical function | ||||
| SMI (kg/m2) | 15.8 ± 2.6 | 15.8 ± 1.4 | 0.67 | |
| 1RM (AU) | 84.4 ± 21.4 | 52.1 ± 14.6 | 0.001* | |
| 1RM (AU/kg FFM) | 1.74 ± 0.2 | 1.15 ± 0.19 | <0.0001* | |
| VO2 peak (L/min) | 2.2 ± 0.5 | 1.5 ± 0.4 | 0.10 | |
| VO2 peak (ml/kg/min) | 31.4 ± 5.6 | 21.7 ± 4.2 | <0.001* | |
M; Male, F; Female, BMI; body mass index, SBP; systolic blood pressure, DBP; diastolic blood pressure, SMI; total skeletal muscle index, 1RM; 1 repetition maximum, AU; arbitrary units. VO2 peak; peak oxygen uptake. Data are shown as mean ± SD, * p ≤ 0.05, Wilcoxon rank sum test for age group comparisons and for non-parametric distributions.