Blood Flow Restriction Training as a Targeted Intervention for Rowers With Back Pain.

Inclusion Criteria:

* Aged 13-20 years old
* Currently active rower (training ≥3 days/week or 12 hours/week)
* Mild LBP with a low reactivity (\<3/10) or recurring LBP within the past 18 months that has affected attendance to team practices/races.
* Able to complete a 2,000-meter rowing erg test

Exclusion Criteria:

* Have severe or acute back pain that limits basic movement or requires medical treatment
* History of spinal surgery or structural spine conditions (scoliosis requiring bracing/surgery)
* Have a contraindication to BFR training, identified via BFR safety screening form:
* Peripheral vascular disease (PVD)
* History of vascular surgery in arms or legs
* Skin grafts on arms or legs
* Arteriovenous fistula in limbs
* Cognitive or physical impairment that limits participation
* Hypertension or high blood pressure (uncontrolled or undiagnosed)
* Bleeding disorders (e.g., hemophilia)
* Blood clotting disorders (e.g., lupus, factor-V Leiden)
* Past history of DVT or pulmonary embolism (PE)
* Surgery in the past 12 weeks
* Recent limb immobilization (e.g., cast, boot) in the last 4 weeks
* History of stroke or transient ischemic attack (TIA)
* History of cancer
* Diagnosed heart disease
* History of rhabdomyolysis
* Diagnosed diabetes
* Sickle cell disease
* History of compartment syndrome
* History of nerve damage or injury
* Any prior complications or adverse reactions to BFR training
* Any other medical conditions that should be cleared by a physician before starting BFR
* Pregnancy(Self-reported)