Medical disclaimer
This page is educational. It is not a diagnosis or a substitute for physiotherapy assessment. If you are in significant pain or unsure whether it is safe to stretch, see a physiotherapist or doctor before attempting any of the stretches on this site.
Hip flexor pain: when to stretch, when to stop, when to see a physio
Not all hip pain is the same. Stretching a tight hip flexor is different from stretching a strained one, and the latter can make an injury significantly worse. This guide helps you understand what you are dealing with before you start.
The three states: tightness, soreness, and strain
Tightness (okay to stretch)
- Gradual, chronic onset - present for weeks or months
- Dull pulling sensation at the front of the hip
- Present when standing up from sitting, or at the start of a run
- Eases after 5-10 minutes of movement
- No specific injury or incident that caused it
Soreness / delayed-onset muscle soreness (stretch gently)
- Onset 12-48 hours after exercise (especially new or increased volume)
- Diffuse aching, not sharp
- Tender to touch
- Resolves within 48-72 hours
- Symmetrical (affects both sides, not just one)
Strain / injury (do NOT stretch actively)
- Sudden onset during a specific activity (sprinting, kicking, lunging)
- Sharp pain at the front of the hip or groin
- Pain worse with active hip flexion (lifting the knee)
- Tenderness to direct pressure on the hip flexor
- Possible bruising, swelling, or visible deformity (severe)
Grading a hip flexor strain
| Grade | Injury | Symptoms | Recovery |
|---|---|---|---|
| Grade 1 | Minor muscle fibre tears (<10%) | Mild pain, full or near-full strength, able to walk normally | 1-3 weeks |
| Grade 2 | Partial tear (10-50% of fibres) | Moderate pain, reduced strength, antalgic gait, possible bruising | 4-8 weeks |
| Grade 3 | Complete tear | Severe pain, loss of hip flexion power, significant bruising and swelling | 3-6+ months, possible surgery |
Immediate red flags: stop and seek care
Stop stretching immediately and consult a physiotherapist or doctor if:
- Pain radiates down the leg (possible nerve root involvement or disc pathology)
- You felt or heard a pop or snap in the hip during activity
- There is visible bruising or significant swelling
- You cannot bear full weight on the leg
- Pain is severe (7+/10) or woke you from sleep
- Bladder or bowel changes accompany the hip pain (this is a medical emergency)
- Symptoms are progressively worsening over 48-72 hours despite rest
Hip flexor tendinopathy
Tendinopathy is different from both tightness and acute strain. It is a chronic degenerative condition of the tendon, often caused by repetitive loading without adequate recovery. In the hip flexors, it presents as:
- Gradual onset, not acute
- Pain at the front of the hip that is worse with stretching (this distinguishes it from tightness)
- Pain at the start of activity that warms up and returns at the end
- Often in runners who increased training volume rapidly
The evidence-based treatment for tendinopathy is loading, not stretching - isometric and eccentric exercises prescribed by a physiotherapist. Stretching a tendinopathic tendon can aggravate it. If stretching consistently makes your hip pain worse, see a physiotherapist for a proper assessment.
When to see a physiotherapist
Persistent hip pain that does not improve with rest and gentle movement needs assessment. Do not continue stretching into pain.
If stretching consistently increases your pain (not discomfort - pain), this may indicate tendinopathy or a structural issue that needs assessment.
If you are limping, shifting your weight, or avoiding normal walking patterns due to hip pain, see a physiotherapist.
Pregnancy ligament laxity changes hip mechanics. Seek a pregnancy-specialist physiotherapist for modified mobility work.
Many post-surgical hip precautions restrict range of motion. Confirm with your surgeon before attempting any hip mobility work.