Execution:
- Patient is in prone lying position
- The examiner passively flexes the patient’s knee maximally
Positive Outcome: The patient spontaneously flexes the hip upon maximal knee flexion to compensate for a shortened rectus femoris at the knee or experiences pain during the test.
| Study | Reliability | Sn | Sp | LR+ | LR- |
| Peeler et al. (2008): positive/negative test |
Intra-rater κ=0.52 Inter-rater κ=0.46 |
NA | NA | NA | NA |
| Peeler et al. (2008): goniometer |
Intra-rater ICC=0.69, Inter-rater ICC=0.66 | NA | NA | NA | NA |
