Table 1. Relationship between navicular drop ratio and maximal voluntary contraction torque ratio of the plantar flexion of the metatarsophalangeal joints.
| Position of the MTP and ankle joints | Measured joints | MVC torque (N/kg) |
NDs (mm) |
Correlation Coefficients |
|---|---|---|---|---|
| Neutral | First MTP | 0.13 ± 0.03 | 7.4 ± 2.5 | −0.52 |
| Second-fifth MTP | 0.09 ± 0.03 | −0.38 | ||
| 45° dorsiflexion of the MTP joints, 20° plantar flexion of the ankle joint | First MTP | 0.17 ± 0.03 | −0.78* | |
| Second-fifth MTP | 0.12 ± 0.02 | −0.82* |
Mean ± SDs; MTP joint: metatarsophalangeal joint; MVC torque: maximal voluntary contraction torque; ND: navicular drop; *p < 0.01