The most effective way to stretch your psoas is a kneeling lunge stretch with a posterior pelvic tilt, held for 30 seconds per side and repeated for two sets. The psoas is a deep muscle that runs from your lower spine to your inner thighbone, and because it spends most of the day shortened (any time you’re sitting), it responds well to consistent, properly positioned stretching.
Why the Psoas Gets Tight
The psoas major originates from the vertebrae and discs of your lower spine (the last thoracic and first four lumbar vertebrae) and travels down through your pelvis to attach at a bony bump on the inside of your upper femur. Its job is twofold: it flexes your hip (lifting your knee toward your chest) and stabilizes your lumbar spine when you’re sitting. That second role is the problem. Every hour you spend in a chair, the psoas is in a shortened position doing stabilization work. Over time, it adapts to that shortened length.
A chronically tight psoas pulls on the front of your pelvis, tilting it forward and increasing the curve in your lower back. This can show up as lower back pain (particularly where your spine meets your pelvis), hip pain, groin pain, or stiffness that worsens when you try to stand up straight. Some people notice the pain radiates down their legs or causes them to shuffle when walking.
The Kneeling Lunge Stretch
This is the foundational psoas stretch, and getting the positioning right matters more than how far you push into it.
- Starting position: Kneel on the leg you want to stretch. Place the other foot flat on the floor in front of you, knee bent at roughly 90 degrees. If the kneeling knee is uncomfortable, fold a towel underneath it.
- Pelvic tilt: Before you move forward, tuck your tailbone slightly under you, as if you’re flattening the curve in your lower back. This is a posterior pelvic tilt, and it’s the single most important cue. Without it, you’ll feel the stretch in your quads but largely bypass the psoas.
- The stretch: Keeping your back straight and your pelvis tucked, slowly shift your hips forward. You should feel a deep stretch in the front of the hip and upper thigh of your back leg.
- Hold and repeat: Hold for 30 seconds. Rest 30 seconds, then repeat for a second set. Do both sides.
The pelvic tilt is worth emphasizing because the psoas attaches to your lumbar spine. If your pelvis tilts forward during the stretch (the natural tendency), it slackens the muscle at its upper attachment and the stretch becomes less effective. Keeping a flat or slightly tucked pelvis locks the top end of the psoas in place so the hip extension actually lengthens the muscle.
The Supine Edge Stretch
This variation uses the edge of a bed or sturdy table to let gravity do the work, and it’s easier to control your pelvic position because your back is flat against a surface.
Sit at the very end of a bed or table. Lie back while pulling both knees to your chest. Press your lower back flat against the surface (posterior pelvic tilt again). Keep one knee hugged to your chest and slowly lower the other leg off the edge, letting it hang toward the floor. The weight of your leg provides the stretch. If your lower back starts to arch off the surface, you’ve gone too far, so pull the hanging leg back up slightly and re-flatten your back before lowering again.
This position is particularly useful because it isolates the psoas from compensation patterns. When you’re kneeling, it’s easy to cheat by arching your back or leaning your torso forward. Lying flat removes those options. Hold each side for 30 seconds, two sets.
Standing and Active Options
If kneeling isn’t comfortable or you want a stretch you can do at work, a standing lunge works. Step one foot far behind you, keep your torso upright, tuck your pelvis, and gently press your hips forward. The range of motion is smaller than the kneeling version, but it’s accessible anywhere.
For an active approach, try lying face-up with both feet flat on the floor and knees bent. Keeping your lower back pressed to the floor, slowly slide one leg out straight along the ground. If your back arches before the leg is fully extended, that’s your current limit. Hold the extended position for 30 seconds. This teaches your nervous system to allow hip extension while your core keeps the pelvis stable, which is ultimately what you need the psoas to do in real life.
How Often to Stretch
Clinical trials on hip flexor mobility use protocols of two sets of 30 seconds per side, which is a practical minimum per session. For a chronically tight psoas, daily stretching produces noticeably better results than two or three times a week, especially during the first several weeks. If you sit for long periods, splitting your stretching into two shorter sessions (morning and evening, or midday and evening) can prevent the muscle from re-tightening fully between sessions.
Results aren’t instant. The psoas is a deep, dense muscle with strong fascial connections to the spine, and it takes weeks of consistent work to see lasting changes in resting length. Most people notice reduced stiffness when standing up within the first one to two weeks, with more significant improvements in pelvic alignment and back comfort over four to six weeks.
Stretching Alone Isn’t Enough
Stretching lengthens the psoas, but if the muscles that oppose it are weak, your pelvis will keep tilting forward and the tightness will return. The psoas pulls the pelvis into an anterior tilt; your glutes and deep abdominals pull it back. Strengthening both muscle groups alongside your stretching routine is what produces lasting change.
Glute bridges, where you lie on your back with knees bent and press your hips toward the ceiling while squeezing your glutes, directly counter the psoas pull. Dead bugs, where you lie face-up and slowly extend opposite arm and leg while keeping your back flat, train your core to stabilize the pelvis in the exact pattern the psoas disrupts. Adding two to three sets of each, a few times a week, makes your stretching significantly more effective over time.
When Tightness Might Be Something More
A tight psoas from sitting too much responds predictably to stretching: you feel stiff, you stretch, it improves. Psoas syndrome is a step beyond that. It involves pain in the lower back, groin, hip, or buttocks that worsens with activity and can make it painful to stand up straight. The pain sometimes radiates down the legs. If your symptoms match that pattern and stretching alone isn’t helping after a few weeks, a physical therapist can assess whether you’re dealing with tendon irritation, a snapping hip, or another issue in the area. First-line treatment for psoas syndrome still centers on stretching and strengthening, but a guided program can target the specific problem more precisely than general stretches.