Table 5.
Repetitive jumping II: data presented for both maximal and submaximal repetitive jumping at self-selected frequency.
| Maasai (n = 9) | Controls (n = 8) | 95% C.I. | P | |
|---|---|---|---|---|
| Muscle–tendon mechanics. Maximal repetitive jumping | ||||
| Avg fascicle length, (range) (mm) | 34.9 (34.0 − 35.4) | 33.2 (31.0 − 34.4) | − 4.1, 7.5 | 0.523 |
| Avg fascicle length/resting length | 0.73 ± 0.10 | 0.70 ± 0.65 | − 0.4, 0.5 | 0.240 |
| Avg p. angle, (range) (°) | 28.0 (27.2 − 28.7) | 28.9 (27.5 − 30.89) | − 1.5, 0.1 | 0.722 |
| Avg p. angle/resting p. angle (°) | 1.4 ± 0.2 | 1.4 ± 0.3 | − 0.2, 0.2 | 0.982 |
| Max MTU length/sMTU length | 1.17 ± 0.02 | 1.13 ± 0.02 | 0.0, 0.1 | 0.007* |
| Max TT length/sTT length | 1.09 ± 0.02 | 1.03 ± 0.04 | 0.0, 0.1 | 0.002* |
| Muscle–tendon mechanics. Submaximal repetitive jumping | ||||
| Avg fascicle length, (range) (mm) | 33.5 (32.8–34.0) | 34.0 (32.9–34.5) | − 3.9, 4.6 | 0.865 |
| Avg fascicle length/resting length | 0.70 ± 0.11 | 0.67 ± 0.14 | − 0.1, 0.2 | 0.635 |
| Avg p. angle, (range) (°) | 29.3 (28.6–30.1) | 27.0 (26.4–27.6) | − 2.8, 3.1 | 0.367 |
| Avg p. angle/resting p. angle (°) | 1.5 ± 0.3 | 1.3 ± 0.1 | − 0.1, 0.4 | 0.133 |
| Max MTU length/sMTU length | 1.15 ± 0.02 | 1.11 ± 0.02 | 0.02, 0.06 | 0.005* |
| Max TT length/sTT length | 1.08 ± 0.02 | 1.01 ± 0.04 | 0.04, 0.1 | 0.001* |
Fascicle length and pennation angles are presented as average (mm and °)during the stance phase of jumping, as range (mm and °), and relative to standing length (sMTU) and resting angle respectively. Group mean ± SD. 95% confidence interval (C.I.) for differences between means.