Exercising your hip flexors involves both stretching and strengthening the muscles at the front of your hip that lift your thigh toward your chest. These muscles tend to get tight from prolonged sitting and weak from underuse, a combination that can pull your pelvis forward and contribute to lower back pain. A well-rounded routine takes about 15 minutes and should include mobility work, targeted strengthening, and progressive resistance as you get stronger.
The Muscles You’re Actually Working
Four muscles produce flexion at the hip joint. The two most important are the iliacus and the psoas major, which sit deep in your core and connect your spine and pelvis to your thigh bone. When these muscles contract, they bring your thigh forward (think: marching, climbing stairs, or sprinting). When your feet are planted, they pull your torso upright from a reclined position, which is why sit-ups feel like a hip flexor exercise.
The other two are the rectus femoris (part of the quadriceps) and the sartorius, both of which cross the hip and the knee. Rectus femoris is actually a fairly weak hip flexor. Its primary job is straightening your knee. This matters because exercises that target only the quads won’t do much for hip flexor strength. You need movements that specifically involve lifting the thigh against resistance.
Why Tight Hip Flexors Cause Problems
When your hip flexors are chronically shortened from sitting, they create an anterior pull on the pelvis known as anterior pelvic tilt. Your pelvis tips forward, your lower back arches excessively, and the curve in your lumbar spine deepens. This posture compresses the joints in your lower back and can cause aching or stiffness after standing for long periods.
Tight hip flexors also inhibit the opposing muscle group: your glutes. When one side of a joint is constantly pulling, the other side essentially turns off. This creates a cycle where your glutes get weaker, your hip flexors get tighter, and your lower back picks up the slack for both. Breaking that cycle requires stretching the hip flexors and strengthening the glutes alongside them.
Four Stretches for Hip Flexor Mobility
Hold each stretch for 30 seconds per side, repeat for three sets, and aim for at least twice a day if your hips feel particularly stiff.
Half-Kneeling Hip Flexor Stretch
Kneel on the floor and step your right foot forward so your right thigh is parallel to the ground with the knee at 90 degrees. Your left knee stays on the floor with the shin pointing straight back. Place your hands on your hips, squeeze your glutes, and tuck your pelvis under you. With a straight back, shift your weight forward until you feel a stretch through the front of the left thigh and groin. For a deeper stretch, reach your left arm overhead and lean slightly to the right. This is the single most effective hip flexor stretch because it directly lengthens the psoas and iliacus on the kneeling side.
Supine Hip Flexor Stretch
Lie on your back at the edge of your bed with both legs extended. Bend your left knee and plant that foot flat on the bed, keeping your lower back pressed down. Let your right leg hang off the side of the bed, then bend that knee back as far as you can while keeping your back flat. For more intensity, grab your left knee and pull it toward your chest. Gravity does most of the work here, making this a good option if kneeling is uncomfortable.
Side-Lying Hip Flexor Stretch
Lie on your left side with your knees bent in line with your hips, thighs and shins forming a 90-degree angle. Reach back with your right hand and grab your right ankle, then slowly pull your foot behind you. Keep your pelvis tucked under and resist the urge to arch your back. You’ll feel the stretch along the front of your thigh and deep in the hip flexor on the right side.
90/90 Stretch
Sit on the floor with your right leg in front of you, knee bent at 90 degrees, and your left leg out to the side, also bent at 90 degrees. Square your shoulders forward and place your fingertips on either side of your right shin. Focus on sinking both hips into the floor. To deepen it, lean your chest forward without rounding your back or letting your hips lift. This stretch opens the hip in rotation, which complements the flexor-specific stretches above.
Strengthening Exercises for Hip Flexors
Aim for 3 sets of 10 to 15 repetitions, three times per week. Start with bodyweight-only versions and add resistance once the movements feel controlled.
Pelvic Tilt With Marching
Lie on your back with knees bent and feet flat on the floor. Tighten your belly muscles by pulling your navel toward your spine and press your lower back into the floor. You should feel your hips and pelvis rock slightly backward. Keeping that core tension locked in, slowly lift one foot off the ground (like a slow march), lower it, then lift the other. Repeat 8 to 12 times per foot. This is the best starting exercise because the pelvic tilt cue teaches you to engage your hip flexors without letting your lower back take over.
Scissors
Lie on your back with your knees bent at 90 degrees and your feet off the floor. Tighten your core and press your lower back flat. Slowly straighten one leg until it hovers about 30 centimeters (12 inches) off the floor and hold for 6 seconds. Return to the starting position and switch sides. Do 8 to 12 reps per leg. Breathe normally throughout and resist the urge to hold your breath, which tends to spike your blood pressure and reduce core stability.
Standing Hip Flexion With Band
Anchor a resistance band to a sturdy object at floor level and loop the other end around your ankle. Face away from the anchor point and drive your knee forward and upward against the band’s resistance. Control the return to the starting position rather than letting the band snap your leg back. This exercise strengthens the hip flexors through their full range and also challenges the balance and stability of the standing leg. Repeat 10 to 12 reps per side.
Supine Banded March
Lie on your back with a resistance band looped around both ankles. Pull one knee toward your chest against the band’s tension while keeping the other leg extended on the floor. This mimics the marching exercise but adds resistance from the first rep. It targets the deep hip flexors (iliacus and psoas) more directly than exercises that involve straightening the knee.
Pairing Hip Flexor Work With Glute Strengthening
Because tight hip flexors suppress glute activation, the most effective routines train both muscle groups in the same session. Two exercises complement hip flexor work especially well.
The single-leg hip bridge targets the glutes directly. Lie on your back with knees bent and feet flat, about a hand’s distance from your butt. Lift one foot off the floor, then drive through the opposite heel and squeeze your glutes to raise your hips until your shoulders and knee form a straight line. Hold for 3 to 5 seconds, then lower. Do 10 to 15 reps before switching sides, for 2 to 3 sets total.
The lateral band walk hits the side glutes, which stabilize your pelvis during walking and running. Place a resistance band just above your knees, drop into a shallow squat, and step sideways for 10 steps in each direction. Keep your feet hip-width apart throughout so the band stays taut. Watch that your knees don’t cave inward. Repeat three times.
How to Progress Over Time
Bodyweight exercises work well for the first two to four weeks, but your hip flexors adapt quickly. Resistance bands are the simplest way to add load because you can increase band thickness as you get stronger. Start with a light band and move to medium or heavy when you can complete all 3 sets of 15 reps with clean form.
You can also progress by slowing down the lowering phase of each rep. Taking 3 to 4 seconds to lower your leg during a marching exercise or scissor hold increases the time your muscles spend under tension without adding any equipment. Another option is pausing at the hardest point of the movement (knee at its highest during a march, for example) for 3 to 5 seconds before lowering.
Form Mistakes That Strain Your Back
The most common error during hip flexor exercises is letting your lower back arch off the floor. When your core loses tension, the psoas pulls directly on the lumbar spine instead of moving the leg. This turns a hip flexor exercise into a lower back stress test. The fix is simple: before every rep, press your lower back into the floor and keep it there. If your back starts to lift, you’ve either gone too far with the range of motion or chosen a progression that’s too advanced.
During the half-kneeling stretch, people often lean their torso forward instead of shifting their hips. This bypasses the hip flexor entirely and just loads the front knee. Keep your trunk upright and think about driving your hips forward while squeezing the glute on the kneeling side. The glute squeeze tilts your pelvis posteriorly, which deepens the stretch on the hip flexor without any extra forward lean.
Finally, avoid bouncing in and out of stretches. Ballistic movement triggers a protective reflex in the muscle that actually increases tightness. Ease into each stretch gradually, hold at the point of mild tension, and breathe steadily throughout.