Blood Flow Restriction Training for Quadriceps Rehabilitation: Mechanisms, Applications and Clinical Evidence

Abstract Quadriceps muscle weakness is a prevalent feature across various musculoskeletal conditions, including anterior cruciate ligament injuries, patellofemoral pain syndrome, osteoarthritis and sarcopenia. While high-load resistance training (HLRT) remains the standard approach for restoring strength and hypertrophy, it may be contraindicated or impractical during early rehabilitation due to concerns over joint stress, graft protection and comorbidities in older adults. Blood flow restriction (BFR) training has emerged as a promising alternative, allowing significant muscle adaptations at low loads (20%–30% one-repetition maximum) through the partial occlusion of arterial inflow and full restriction of venous outflow. This review explores the underlying physiological mechanisms – including metabolic stress, Type II fibre recruitment, cellular swelling and hypoxia-driven anabolic signalling – that enable BFR to replicate the benefits of HLRT. The clinical applications span post-operative care, sarcopenia management and athletic conditioning, with evidence supporting its role in preserving muscle mass, enhancing strength and reducing disuse atrophy. Safe implementation requires careful protocol adherence, including Doppler-based limb occlusion pressure assessment, proper cuff selection and vigilant monitoring for adverse effects. Despite encouraging outcomes, further research is needed to address gaps related to sex-specific responses, long-term safety and BFR’s potential in managing tendinopathies and facilitating tissue healing. BFR training thus represents a practical, evidence-informed strategy to enhance quadriceps rehabilitation across a range of clinical scenarios.