TABLE 2.
Changes in the percentage of muscle force contribution (PForce) with reduction of maximal force value for specified muscles. The primary hip muscles in which PForce increases from Condition 1 to Condition 4 during the two exercises are listed below. The change in maximum anterior hip joint force is the increase in the maximum anterior hip joint force contributed by each muscle between Condition 1 and Condition 4. Condition 1 is 100% and Condition 4 is 5% of the maximum isometric force for the gluteal and iliopsoas muscles.
| Exercise | Muscle | PForce Condition 1 (%) | PForce Condition 4 (%) | Change in PForce (%) | Change in maximum anterior hip joint force (N) |
|---|---|---|---|---|---|
| Prone hip extension | Semimembranosis | 26.5 | 77.9 | 51.4 | 172.8 |
| Tensor fascia lata | 1.0 | 100.3 | 99.3 | 32.9 | |
| Sartorius | 0.0 | 100.3 | 100.3 | 41.6 | |
| Supine hip flexion | Tensor fascia lata | 24.7 | 93.3 | 68.6 | 13.0 |
| Sartorius | 20.2 | 78.2 | 58.0 | 16.0 | |
| Adductor longus | 12.9 | 65.7 | 52.8 | 66.6 |