Using wireless inertial measurement units for measuring hip range of motion through commonly used clinical tests.

This article focuses on evaluating the concurrent validity and test-retest reliability of the WIMU Pro inertial sensor device for measuring hamstring extensibility via hip range of motion during the Active Straight Leg Raise (ASLR) and Passive Straight Leg Raise (PSLR) tests. In a study involving 18 healthy male participants, the WIMU Pro demonstrated strong agreement with a standard bi-level inclinometer, showing low measurement error (standard error of measurement below 0.6°) and high intraclass correlation coefficients close to 1. Test-retest reliability was also high, with no significant differences between repeated measures and coefficients of variation below 2.7%. The findings suggest that WIMU Pro is a valid and reliable tool for assessing hip flexion range of motion in clinical and athletic settings, offering practical advantages such as wearable technology and integrated data management.