The treatment will depend on grade of tear and if there is complete or partial tear. If there is complete tear then surgery would be required. If there is partial tear conservative treatment (exercise and physiotherapy) can be helpful. Also considering 1 year duration of injury, there is a high chance the muscle has gone into wasting.
Next Steps
Please visit nearby orthopaedic doctor. If he suggests conservative treatment then please visit a qualified physiotherapy professional.
Health Tips
Avoid doing painful movements.