Thomas Test
Thomas Test Exercise Description
The Thomas Test is a controlled supine position used to assess hip flexor length and, in a training context, to create a gentle, gravity-assisted stretch for the front of the hip. By flexing one hip to stabilize the pelvis on the bench, the opposite leg is allowed to hang into passive hip extension, targeting the iliopsoas and rectus femoris of the hanging side. The goal is to feel an even, mild stretch across the front of the thigh/hip without arching the low back or letting the pelvis tilt forward. Maintaining a neutral spine, level pelvis, and straight thigh alignment helps you sense true hip extension rather than compensations from the lumbar spine or pelvis. This position can help you notice side-to-side differences and practice clean alignment while lengthening the anterior hip tissues. Move in and out of the position with control, avoid forcing range, and prioritize steady breathing to stay relaxed.
- Muscle Groups: Hips
- Target Muscles: Iliacus, Psoas Major
- Assisting Muscles: Rectus Femoris
- Stabilizing Muscles: Multifidus, Rectus Abdominis, Transversus Abdominis
- Body Area: Lower Body
- Body Parts: Hips, Legs, Upper Legs
- Body Surface: Front
- Body Symmetry: Unilateral
- Equipment: Bodyweight
- Exercise Patterns: Other
- Exercise Type: Stretching
- Functional Grouping: Hip Flexors
- Joint Involvement: Other
- Muscle Location: Hip Flexor
- Movement Direction: Other
- Muscle Position: Anterior
- Gender: Female
How To Do The Thomas Test Exercise
‘- Use a firm bench/table high enough that your lower legs can hang freely.
– Sit near the edge, then lie back so your sacrum and low back contact the surface.
– Hug one knee toward your chest with both hands to lightly posteriorly tilt the pelvis and stabilize your spine.
– Let the opposite leg hang off the edge; relax the knee so the thigh drops into hip extension.
– Keep your lower back in contact with the bench—avoid lumbar arching or pelvic tilt changes.
– Align the hanging thigh with your midline; don’t let it drift outward or rotate.
– Keep the pelvis level; imagine your “belt line” staying flat.
– Breathe slowly; release tension in the front of the hanging thigh without pulling the foot back.
– To gently increase the stretch, bring the held knee a bit closer or add a slight posterior pelvic tilt—no bouncing.
– Exit by assisting the hanging leg back to the bench before releasing the held knee.
– Switch sides, and stop if you feel joint pinching or sharp discomfort.
Thomas Test Tips
‘- Choose a firm bench or table high enough that your lower legs can hang freely.
– As you lie back, make sure your sacrum and low back stay in contact with the bench.
– Hug one knee toward your chest with both hands to lightly posteriorly tilt the pelvis and stabilize your spine.
– Let the opposite leg hang and relax the knee so the thigh can drop into passive hip extension.
– Keep your lower back pressed into the bench to avoid lumbar arching or pelvic tilt changes.
– Align the hanging thigh with your midline and prevent it from drifting outward or rotating.
– Keep your pelvis level—imagine your “belt line” staying flat and even.
– Breathe slowly and release tension from the front of the hanging thigh without pulling the foot back.
– To gently increase the stretch, bring the held knee slightly closer or add a mild posterior pelvic tilt—avoid bouncing or forcing range.
– When exiting, assist the hanging leg back onto the bench before releasing the held knee, and stop if you feel joint pinching or sharp discomfort.
Thomas Test Beginner Introduction
The Thomas Test places the body on a firm bench or table in a lying position to both assess and gently stretch the front of the hip. One leg is brought toward the chest to steady the lower back and pelvis against the surface, while the other leg hangs freely off the edge. In this setup, gravity encourages a light lengthening sensation through the hip flexors and the front of the thigh on the lowered side.
This position emphasizes a calm, controlled posture rather than forcing extra range. A steady spine, level pelvis, and thigh that lines up with the body’s center help highlight how much true hip extension is present, rather than motion coming from the lower back or tipping of the pelvis. Many people also use this test-style stretch to notice differences between sides and to rehearse organized alignment while the front of the hip gradually lengthens. Gentle, unhurried breathing supports relaxation in the hanging leg and helps the stretch stay mild and sustainable.