Hip Mobility Test at Home: 5-Minute Self-Check

If you sit for a living, your hips are almost certainly tighter than you think. The problem is most people only find out the hard way. A tweaked low back lifting a kid, a knee that starts bothering them on runs, a deadlift they can't get depth on. By the time your body tells you, the issue has usually been brewing for years.

There's a simpler option: a hip mobility test at home. Four checks, five minutes, floor space. You can do them in your living room this morning and come out with a real sense of where your hips actually are. This is the same kind of assessment I run in the first session with every new client in San Jose, pared down to what you can check on your own without a coach watching you.

What "hip mobility" actually means

Hip mobility isn't one thing. The hip is a ball-and-socket joint, which means it moves in several directions. Different restrictions cause different problems, and that's why a general "am I flexible?" gut check misses so much.

Four directions matter for most people. Flexion, which is pulling the knee up toward the chest. Extension, straightening the leg behind you. External rotation, turning the leg outward from the hip. And internal rotation, turning it inward. Desk workers usually lose extension first. Internal rotation goes next from the same cause. External rotation tightens up later as the inner thigh muscles (your adductors) stay too short from sitting.

You can be plenty flexible in one direction and locked up in another. The point of a real test is to pick up on which one is actually limiting you, so you're working on the right thing.

Before you test

Don't walk off the couch into these. You'll get a cold read that's worse than your actual baseline.

Two minutes is enough. Walk around, do ten bodyweight squats, and swing each leg forward and back ten times. That's it. You're trying to bring some blood into the joint and wake up the nervous system, not warm up for a workout.

Test each side separately. Hip restrictions are rarely symmetric, especially for people with a dominant sitting leg or a history of old injuries.

Test 1: Supine hip flexion

This one checks how much your hip will bend when you pull your knee toward your chest, and it also catches posterior chain tightness hiding upstream.

Lie on your back on the floor. Legs straight. Keep one leg flat on the ground and pull the other knee toward your chest with both hands. Use only the effort it takes to bring it in. No bouncing.

What you're measuring: how close the knee gets to the chest, and what the straight leg does while you pull.

Pass: Knee comes within a few inches of the chest. Straight leg stays flat on the floor. Borderline: Knee gets most of the way in, but the straight leg starts to lift off the floor as you pull. Fail: Knee stops well short, or the straight leg bends and lifts off the floor to let you get the other knee in.

If your straight leg lifts off the floor, that's a hip flexor tightness signal on the opposite side. It's a pattern I see in almost every desk worker. The sitting-tight hip flexors on the planted leg don't have enough slack to let the pelvis sit flat while the other knee comes up.

Test 2: Modified Thomas test for hip extension

This is the big one for desk workers. Tight hip flexors don't just feel tight at the front of the hip. They pull the front of the pelvis down, tilt it forward, and shove the low back into a chronic arch. That's the mechanism behind the 2 PM lower-back ache that won't go away no matter how many times you readjust your chair.

The setup matters. Sit on the edge of a bed, a firm couch, or a sturdy table. Your butt should be right at the edge. Lie back. Pull both knees toward your chest so your lower back flattens onto the surface behind you, then let one leg slowly lower toward the floor while keeping the other knee hugged to your chest.

What you're measuring: does the back of the lowered leg rest at or below the height of the surface you're on, and does your low back stay flat while you lower it?

Pass: Lowered thigh rests flat or slightly below horizontal, no low-back arching to compensate. Borderline: Thigh hovers above horizontal but drops with a little breathing and relaxation. Fail: Thigh stays above horizontal no matter what, or the low back arches off the surface as soon as you try to lower it.

This one is worth repeating on the other side. I've had clients with a 15-degree difference between legs, and they didn't know until they tested. That asymmetry shows up everywhere else: tracking on squats, kneeling discomfort, running gait, deadlift setup.

Test 3: 90/90 seated rotation

This one catches internal and external rotation together. For desk workers, that's where a lot of restriction hides that doesn't show up in the other tests.

Sit on the floor. Bend one leg in front of you at 90 degrees, shin parallel to your body. Bend the other leg out to the side at 90 degrees, shin parallel the other way. Both knees are on the floor. Both hips stay as level as you can keep them.

Now try to sit upright with both knees still on the floor. Palms on the floor in front of you if you need support.

What you're measuring: can you stack both hips over your sitting bones without one hip cranking way off the ground, and can your back knee (the one rotated out to the side) stay close to the floor?

Pass: You can sit tall, both knees flat on the floor, hips level, chest up without straining. Borderline: You can get there, but only with noticeable effort, and the back knee wants to drift off the floor. Fail: The back knee lifts several inches off the floor, or one hip cranks up to get any knee contact, or you can't sit upright without falling backward.

The front leg is testing external rotation. The back leg is testing internal rotation. For people who sit all day, internal rotation on the back leg is usually the first thing to go, so if it's your back knee that wants to lift, that's your answer.

Test 4: Butterfly depth

This one tests your adductors (the inner thigh muscles that run down from your pelvis) and some of your external rotators together.

Sit on the floor. Bring the soles of your feet together in front of you and let your knees fall out to the sides. Scoot your feet in until your heels are 6 to 10 inches from your body. Rest your hands on your ankles. Don't push the knees down with your elbows.

What you're measuring: how close your knees come to the floor on their own.

Pass: Knees rest within a few inches of the floor, no forced pressure. Borderline: Knees stop at about a 45-degree angle. Fail: Knees barely drop past horizontal, or you can't sit upright without leaning back.

Tight adductors are common in runners and cyclists, but also in people who cross their legs the same way every time they sit. If one knee drops noticeably lower than the other, that's usually your clue that you've had a preferred crossing pattern for years.

Reading your hip mobility test results

One failed test doesn't mean much on its own. A pattern across two or three of them tells you where to start.

If you failed the Thomas test, your lower back pain probably isn't a back problem. It's a hip flexor problem. Stretching your back won't fix it. Opening up the front of the hip and waking up the glutes will.

If you failed the 90/90 and the knee that wanted to lift was the back one, your internal rotation is shot. That tends to show up as knee pain going down stairs and a squat that feels locked up at the bottom. It also makes your hips worse at absorbing the random twisting that happens in daily life. A lot of the non-contact tweaks I see trace back to this.

If your supine flexion test had the opposite leg lifting off the floor, that matches the Thomas test pattern and reinforces that your hip flexors are running the show.

If your butterfly is blocked and your knees don't drop past 45, your inner thighs are too short. You'll usually feel it as a weird side-of-the-hip tightness during lunges or single-leg work. It also gets cranky fast if you suddenly start doing a lot of pickup basketball or pickleball.

If you failed most or all of them, don't panic. It just means ten years of sitting did what ten years of sitting does. Most of it comes back with consistent work. I've watched clients in their fifties pass tests they couldn't get near on day one.

What to do next

Pick your worst test and work that pattern first. Mobility gains compound when you focus, not when you spread yourself thin across every stretch on YouTube.

For hip extension (Thomas test failure), the couch stretch is the single highest-leverage drill I know. Sixty seconds per side, daily, for four weeks, and most people see a measurable change when they retest.

For internal rotation (90/90 failure), 90/90 hip switches done slowly for 8 reps per side, paired with the Thomas-position stretch. The rotation drill teaches the pattern while the stretch opens up the tissue.

For adductor tightness (butterfly failure), the frog stretch and deep squat holds build back the range. Most people will tell you they hate these stretches, which is usually a sign they need them.

If you want a more complete version that covers shoulders, thoracic spine, and ankles along with the hips, I built a free movement screen that does it. Twelve questions, five minutes, no email. It runs through the same assessment I do with new clients and generates a downloadable 1-week program built around whichever areas came back lowest.

A note on actually doing the work

Hip mobility is an area where a couple minutes of the right drill, done consistently, beats thirty minutes of a generic flow you found on social media. The gains come from focus. Most people don't have a focus problem because they're lazy. They have one because they don't know what to pick.

If you tested yourself and came out with a clear pattern, you now do. If you want someone to look at how you actually move and build a real plan around your specific restrictions, that's what one-on-one training is for. I've worked with hundreds of desk workers across San Jose and the South Bay, and the fix is usually less complicated than the starting point makes it feel.