Hamstring muscle tears
British Athletics Muscle Injury Classification (MRI)
| Grade 1 | Grade 2 | Grade 3 | Grade 4 |
|---|---|---|---|
| < 10% CSA | 10 - 50% CSA | > 50% | Complete tears |
| < 5 cm length | 5 - 15 cm in length | > 15 cm long |
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