Hamstring Strain

Hamstring strains are graded 1-3 depending on the severity of the injury, and may occur in one or more of the three hamstring muscles.

Grade 1:
- Overstretch, but no tear of the muscle fibre
- Usually no loss of flexibility or strength
- Increased tightness in the muscle, particularly during activity
- Possible pain when sitting or walking uphill/up stairs
- Minimal swelling

Grade 2:
- Partial tear in the muscle
- Reduced muscular flexibility and strength
- Pain on stretch and touch of the muscle
- Limping during walking
- Bending knee against resistance will be painful

Grade 3:
- Severe or complete rupture of the muscle
- May be a palpable lump above a depression where the tear is
- Sudden, sharp pain in the muscle
- Pain on walking
- Large bruising (usually 2-3 days after injury)
- May require surgical repair if severe