Kendall / Modified Thomas Test for Rectus Femoris Length The modified Thomas test is probably the most commonly used test to measure any hip extension defitits due to muscle shortening. But how reliable and valid is this test? Peeler et al. (2013) showed an almost perfect intra- and inter-rater reliability for the visual and goniometer methods (0.92-0.98). Vigotsky et al. (2016) evaluate the criterion reference validity of the Thomas test to measure peak hip extension and hip extension deficits.

**The Modified Thomas Test: A Simple Way to Assess Hip Flexor Mobility 🦵📝** 🧘‍♂️ The Modified Thomas Test is an easy and effective method to evaluate your hip flexor mobility. It not only highlights how flexible your hip flexors are but also gives insights into other areas that might need attention. 💪 Enhancing hip flexor mobility can benefit you in many ways: better posture, reduced lower back pain, and improved athletic performance. By pinpointing areas that need improvement, you can tailo