This study compared low-load blood flow restriction with elastic bands (BFR-EBT) versus heavy-load training (HL-EBT) on performance in 18 Division I basketball players during a competitive season. Participants performed back squats twice weekly for 8 weeks at ~30% 1RM (BFR-EBT) or ~75% 1RM (HL-EBT). Significant Group × Time interactions were observed for CMJ height (p=0.031) and 30-m sprint time (p=0.014). BFR-EBT significantly optimized CMJ height (+3.4%; Hedges` g = 1.50) and sprint time (-0.8%; Hedges` g = -3.80). HL-EBT showed non-significant changes in CMJ (+1.8%) and sprint speed (+0.2%). Both groups achieved similar 1RM strength gains (p>0.05). Notably, BFR-EBT adaptations occurred with a 3.6-fold lower mechanical training load (p<0.001). Covariate analysis confirmed results were independent of playing time. Low-load BFR-EBT appears more effective than HL-EBT for optimizing power and speed in elite players while sparing mechanical load during a congested season. BFR-EBT represents a viable tool for in-season fatigue management.
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