Isokinetic Exercise Combined With Blood Flow Restriction: High-Load Vs Low-Load Training

The goal of this clinical trial is to see which type of strengthening exercise with a tight band (blood flow restriction) helps people recover better after ACL reconstruction. The study includes adults after ACL surgery who are doing physiotherapy to rebuild thigh muscle strength and knee function.

The main questions are:

* Does heavy strengthening with blood flow restriction improve thigh strength, knee function, and daily activities more than light strengthening with blood flow restriction after ACL surgery? * Can light strengthening with blood flow restriction give similar benefits to heavy strengthening while putting less strain on the knee?

Researchers will compare a heavy-exercise program plus blood flow restriction to a light-exercise program plus blood flow restriction to see which gives better strength and functional improvements.

Participants will:

* Come for supervised physiotherapy sessions and do knee exercises on a machine, using either heavy or light loads while a cuff on the thigh gently squeezes to reduce blood flow. * Have their leg strength, and knee questionnaires checked several times during the study.