BFR with sprinters — a collaborative RCT

Coming into the MPhil at Cambridge, I wanted to get hands-on experience across the breadth of health research — not just nutritional epi, but also things like genomics, physiology, sport science — before settling deeper into one. The publication itself is secondary to the experience. So when an opportunity came to join a sport-physiology RCT led by Ji Zhu and colleagues at Fujian Normal University (with Jiale Wang, Huangkun Chen, Ming Li, and Yanlin Wang), I took it. I contributed the statistical analysis and the writing, and joined as corresponding author.

Most blood-flow restriction (BFR) evidence is in older adults and rehabilitation populations. Data in trained athletes is thin. The team ran an 8-week study in male college sprinters (n = 28), comparing functional strength training (FST) alone against FST + BFR. Cuff pressures were set at 50% of individualised arterial occlusion pressure measured by Doppler — a more rigorous protocol than ratio-based BFR prescriptions.

The finding was narrower than I expected, and that’s the interesting part:

• Both groups improved on isokinetic knee strength, CMJ, squat jump, FMS, Y-Balance
• The BFR-specific advantage was a significant group × time interaction on anaerobic power only (+92.99 W vs FST alone, F = 80.51, η²p = 0.756)
• For overall strength and movement quality, FST alone got you most of the way

Practical framing for coaches: BFR is a power tool, not a generic strength multiplier. If the priority is sprint-relevant anaerobic power, the cuffs do real work. If the priority is general strength, FST alone is probably enough.

Open access in Frontiers in Physiology, 2026: link.