The Thomas Test primarily assesses mobility in which region?

• A. Lumbar Pelvic Hip Complex
• B. Knee joint
• C. Ankle
• D. Shoulder

Answer: (A)

The Thomas Test is about hip flexor length and how it affects the pelvis and lower back. When you bring one knee toward the chest and keep the pelvis stabilized, the test checks whether the hip can extend enough without the lower back compensating. If the thigh rests on the table and the back stays flat, hip flexors are lengthened well. If the lower back arches or the thigh cannot drop to the table, the hip flexors are tight, pulling the pelvis and lumbar spine into movement. So it primarily assesses mobility in the lumbar-pelvic-hip complex, driven by hip flexor length. It does not directly measure knee, ankle, or shoulder mobility.