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Pearson's correlation coefficients between VI shear modulus and relative isometric contraction levels in each group and at different knee joint angles.
| Knee joint angle | Young male | Young female | Elderly male | Elderly female |
|---|---|---|---|---|
| 90° | 0.977 | 0.974 | 0.980 | 0.975 |
| 60° | 0.971 | 0.968 | 0.975 | 0.979 |
