This systematic review analyzed eight randomized controlled trials including patients undergoing rehabilitation after anterior cruciate ligament reconstruction (ACLR). The studies compared the efficacy of blood flow restriction training (BFRT) against standard rehabilitation protocols. Primary outcomes included thigh muscle mass and knee strength, while secondary outcomes were patient-reported measures such as Lysholm and IKDC scores. BFRT was associated with improvements in muscle mass in three of five studies and demonstrated significant enhancements in functional outcomes (p < 0.05) despite moderate heterogeneity. The findings suggest that BFRT may benefit rehabilitation post-ACLR, but standardization and high-quality research are needed for conclusive recommendations.