Table 4.
Displays strength data (PF torque/net PF torque corrected for agonist muscle activation and antagonist co-contraction), agonist activation capacity, antagonist co-contraction and leg lean mass in both young and old BMI classifications
| Young | Old | Young BMI effect | Old BMI effect | Ageing effect | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Underweight (n = 13) | Normal (n = 13) | Overweight (n = 10) | Obese (n = 18) | Underweight (n = 4) | Normal (n = 15) | Overweight (n = 18) | Obese (n = 11) | ||||
| PF torque (Nm) | |||||||||||
| PF MVC 0° | 125.7 (22.3) | 131.6 (28.1) | 150.6 (34.8) | 163.7 (27.7) | 94.4 (32.6) | 95.5 (17.1) | 102.9 (27.0) | 118.0 (30.2) | U N/Ob | – | p < 0.001 |
| MVC relative to body mass (Nm/kg) | 2.38 (0.38) | 2.26 (0.45) | 2.09 (0.34) | 1.67 (0.30) | 1.96 (0.67) | 1.69 (0.28) | 1.44 (0.35) | 1.33 (0.37) | UN O/Ob | U/Ob | p < 0.001 |
| Net PF torque (Nm) | |||||||||||
| PF MVC 0° | 134.9 (21.4) | 142.1 (25.7) | 165.8 (33.3) | 185.4 (36.8) | 105.6 (28.1) | 109.6 (17.4) | 122.6 (26.9) | 134.7 (31.9) | U N/Ob | – | p < 0.001 |
| MVC relative to body mass (Nm/kg) | 2.56 (0.38) | 2.45 (0.41) | 2.27 (0.27) | 1.90 (0.30) | 2.03 (0.40) | 1.99 (0.39) | 1.71 (0.35) | 1.52 (0.39) | U N/Ob | N/Ob | p < 0.001 |
| DF MVC 0° (Nm) | 22.8 (7.2) | 25.3 (5.0) | 27.0 (7.2) | 26.9 (7.0) | 20.1 (4.1) | 19.6 (3.9) | 22.6 (5.0) | 28.4 (6.3) | – | U N O/Ob | p = 0.025 |
| Activation (%) | 95.0 (5.0) | 93.9 (7.8) | 94.1 (6.3) | 87.9 (10.4) | 90.1 (12.1) | 86.4 (10.6) | 82.2 (13.7) | 84.0 (15.2) | – | – | p = 0.001 |
| Co-contraction (%) | 15.7 (7.2) | 17.2 (8.5) | 15.2 (5.8) | 16.1 (5.9) | 15.9 (10.6) | 15.1 (8.8) | 12.9 (7.9) | 12.8 (6.8) | – | – | p = 0.042 |
| Leg lean mass (kg) | 5.99 (0.78) | 6.10 (0.97) | 7.31 (1.05) | 8.30 (1.35) | 5.37 (0.52) | 5.26 (0.52) | 5.81 (0.64) | 7.21 (1.38) | UN/Ob | U N O/Ob | p < 0.001 |
Data are presented as mean ± SD
(U underweight, N normal weight, O overweight, Ob obese