Muscle Injury
Strains and muscle tears from training or overuse.
Related anatomy
- Muscle is made of fibres grouped in bundles.
- Muscle joins tendon at the muscle-tendon junction — the weakest point and the most common site of tears.
- Muscles that cross two joints tear more easily: the hamstring, rectus femoris and calf.
Grading of a tear
| Grade | What happens | Typical recovery |
|---|---|---|
| Grade 1 | A few fibres torn; mild pain; strength normal | 1 to 3 weeks |
| Grade 2 | Partial tear; pain, swelling, weakness | 3 to 8 weeks |
| Grade 3 | Complete tear; severe pain, a gap can be felt, loss of function | Months; surgery may be needed |
How the injury happens
- The muscle is stretched forcefully while it is contracting.
- Typical moments: sudden sprinting, kicking, jumping or changing direction.
- Fatigue, poor warm-up and previous injury increase the risk.
Common muscle tears and their sports
- Hamstring — football, sprinting, rugby
- Calf (“tennis leg”) — tennis, pickleball, badminton
- Quadriceps — football, sepak takraw
- Groin (adductor) — football, hockey
- Chest (pectoralis major) — bench press, weightlifting
Symptoms and signs
- Sudden sharp pain, sometimes a “pop”
- Bruising appearing 1 to 2 days later
- Swelling and tenderness
- Pain when stretching or using the muscle
- Weakness or limping
Management plan
- First few days: protect, raise the limb, compress — and avoid anti-inflammatory tablets in this phase.
- Start gentle movement after 2 to 3 days.
- Progressive strengthening as pain allows.
- Ultrasound or MRI for severe tears.
- Return to sport only with full strength and pain-free sprinting.
- Surgery for complete tears pulled off the bone.
Medical disclaimer: this article is general information, not personal medical advice. Always consult a qualified doctor about your own situation.