Light-load training with a cuff partially limiting blood flow to build strength.
Blood Flow Restriction (BFR) training applies a pneumatic cuff or elastic band to the proximal limb to partially occlude venous return while maintaining arterial inflow, then exercises the limb against light load. The resulting hypoxic, metabolically stressful environment in the muscle drives strength and hypertrophy adaptations that would normally require much heavier mechanical loading.
It gives clinicians a way to load and preserve muscle mass in patients whose joint, tendon, or bone cannot yet tolerate heavy resistance work, such as early post-surgical or post-fracture rehab. This matters on the floor because it shifts the limiting factor from tissue tolerance to a manageable, cuff-based dosing decision, helping reduce the disuse atrophy that otherwise accumulates during protected phases.
A cuff is positioned proximally on the limb and inflated to a set percentage of limb occlusion pressure, ideally determined with a Doppler probe rather than guessed, then the patient performs light-load resistance exercise with higher volume for the session, with the cuff removed afterward. It requires screening for vascular risk factors and is typically delivered under supervision from a clinician trained in cuff pressure protocols rather than as an unsupervised home add-on.
Evidence for extra performance benefit in healthy, already-trained athletes is mixed and less compelling than in the rehab setting, so it should not be assumed to outperform conventional heavy resistance training once loading is no longer restricted. Common misuse includes inflating cuffs to an arbitrary pressure instead of measuring occlusion pressure, continuing BFR as a substitute for heavy loading once the patient can tolerate it, and applying it without screening for contraindications such as prior DVT, peripheral vascular disease, or uncontrolled hypertension.