After anterior cruciate ligament (ACL) reconstruction, patients often experience knee muscle weakness and atrophy. Blood flow restriction (BFR) training offers a way for therapists and patients to build strength using low-load exercises, helping to protect against this muscle loss and support musculoskeletal recovery. This review aimed to assess how effective BFR therapy is for improving quadriceps strength, size, range of motion, and overall function during ACL rehab. Relevant studies from 2020 to 2024 were identified through PubMed and ResearchGate. Because the studies varied widely and carried some risk of bias, the findings should be viewed cautiously. Future randomised trials are needed to clarify the best frequency and duration of BFR training for these patients, so it can be applied more confidently in clinical practice.
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