Which test involves lying on the back on a table, bending one knee to the chest, and is often difficult for runners?

• A. Thomas Test
• B. Sit and Reach Test
• C. Trunk Rotation Test
• D. Back Scratch Test

Answer: (A)

The main idea is about hip flexor length and how to test it. The Thomas test specifically checks how long the hip flexors are, mainly the iliopsoas and rectus femoris. In the test, you lie on your back on a table and pull one knee toward your chest while the other leg stays extended and relaxed on the table. If the leg on the table lifts off, or if your lower back arches and you can’t keep that leg flat, it indicates tight hip flexors. Runners often find this test challenging because repetitive running keeps the hip flexors in a shortened state, making full hip extension harder and producing the observed signs. This test helps identify hip flexor tightness that can affect stride length, back mechanics, and overall running form.