What are the hip flexors?
The hip flexors are a group of muscles at the front of the hip and upper thigh that pull the thigh toward the trunk. The iliopsoas, which runs from the lower spine and pelvis to the top of the thigh bone, is the strongest. The rectus femoris (a quadriceps muscle), sartorius and tensor fasciae latae assist. They work during walking, running, climbing stairs and kicking. See hip flexor strain and músculo psoas (Spanish).
Why they get tight
- Prolonged sitting: holding the hips bent for hours shortens the muscles.
- Running, cycling, rowing and kicking sports that overuse the hip flexors without balanced stretching.
- Weak glutes and core, which makes hip flexors work harder to stabilise the pelvis.
- Sudden increase in training.
- Poor posture, such as an anterior pelvic tilt.
- Previous injury or protective tension.
- Pain or tightness can also come from the lower back, hip joint or groin; assessment helps.
Signs of tight hip flexors
- Pulling or tightness at the front of the hip or upper thigh, particularly after sitting.
- Stiffness when standing up from a chair.
- Lower back arching or aching when standing or walking.
- A short stride and difficulty extending the leg behind you.
- Tight quadriceps and a feeling that the hips are “locked”.
- Pelvis tilting forward, with a protruding abdomen.
- Hip, knee or lower back pain with exercise.
- A simple test: lie at the edge of a bed with one knee hugged to the chest; if the other thigh lifts off the bed, the hip flexor on that side is tight (Thomas test).
Best stretches
- Half-kneeling hip flexor stretch: kneel on one knee with the other foot in front; tuck your pelvis under (tailbone toward the floor) and gently shift forward until you feel a stretch at the front of the hip; reach the same-side arm up for more. Hold 30 seconds.
- Couch stretch: rear foot raised on a couch or wall behind you, knee on the floor; for quad and hip flexor, advanced.
- Standing lunge stretch: a long stride with the back heel lifted, tuck the pelvis and lean forward gently.
- Supine hip flexor stretch off the bed: lie at the edge, hug one knee, and let the other leg hang.
- Kneeling lateral lean to stretch the side of the hip and psoas.
- Bridge with hold to open the front of the hips actively.
- Do 2–3 sets of 30 seconds on each side, daily, to mild tension. Do not push into pinching pain in the front of the hip.
Strengthening to make it stick
- Glute bridges and single-leg bridges: 3 sets of 10–15.
- Hip thrusts and deadlifts with proper form.
- Dead bug and plank for abdominal control of the pelvis.
- Side-lying hip abduction and clamshells. See hip bursitis for gluteal exercises.
- Step-ups and split squats for functional strength.
- Hip flexor strengthening (marching, straight-leg raises) is also helpful if the muscles are weak as well as tight.
- Combining strength and stretch is more effective than stretching alone.
Sitting habits that help
- Stand up and move every 30 minutes; set a timer.
- Use a sit–stand desk or alternate positions.
- Sit with hips slightly above knees and feet flat on the floor.
- Take short walks and do one stretch at each break.
- Avoid sitting cross-legged for long.
- Walk or cycle instead of driving short distances when possible.
For runners, cyclists and gym-goers
Include a dynamic warm-up (leg swings, walking lunges with a twist, high knees) before activity and static hip flexor stretches afterwards. Strengthen glutes and core twice a week and vary training load gradually. Tight hip flexors can contribute to lower back pain, hamstring strains and knee pain, so treat them as part of a whole-body plan. See groin strain.
When to see a clinician
- Sharp groin or hip pain after sudden effort or injury.
- Pain that does not improve after 3–4 weeks of stretching and strengthening.
- Snapping or clicking with pain.
- Hip stiffness, limping or pain at night.
- Numbness or tingling in the thigh or leg.
- Pain with fever, unexplained weight loss or after a fall.
- Back pain with leg weakness or loss of bladder or bowel control: urgent.
Three common situations
An office worker with a stiff, arched lower back at the end of the day: stand and stretch hourly and strengthen glutes.
A runner with a pulling front hip after hill sessions: half-kneeling stretch, glute work and gradual progression.
A person with sharp groin pain after a sprint: assess for a strain; see a physiotherapist.
Key points to remember
Tight hip flexors come from prolonged sitting and overuse; stretch the front of the hip with a tucked pelvis, strengthen the glutes and core and move often. See a clinician for sharp or persistent pain. Our physiotherapy team can design your routine.
This guide is for general information and does not replace an assessment by your own doctor or physiotherapist.
Questions about tight hip flexors
These answers are general information and do not replace an examination or individual medical advice.
What causes tight hip flexors?
Prolonged sitting, repetitive hip flexion in sport, weak glutes and core and poor posture.
What is the best hip flexor stretch?
The half-kneeling stretch with a tucked pelvis, held for 30 seconds on each side.
How often should I stretch?
Daily, 2–3 times per side, together with glute strengthening.
Can tight hip flexors cause back pain?
Yes, they can tilt the pelvis forward and strain the lower back.
Should I strengthen or stretch?
Both; strengthening the glutes and core keeps the benefit.
When should I see a clinician?
For sharp groin pain, persistent symptoms or injury.
Sources
This guide is for general information and does not replace medical advice. How a problem is diagnosed and treated depends on your examination and medical history. If you think you have an emergency, contact your local emergency services.