REF-105 · Zhang, Gao & Gao, 2025 · BMC Sports Science, Medicine and Rehabilitation, 2025 [RE-ATTRIBUTED 2026-07-09 → Zhang, Gao & Gao 2025 "Effects of blood flow restriction training on aerobic capacity and performance in endurance athletes: a systematic review and meta-analysis". The claimed "Gross 2014" work was not matched. Related: Loenneke 2010 mechanistic review · Paper

Blood Flow Restriction Training in Endurance Athletes: Systematic Review and Meta-Analysis

A-fairly strong evidenceMeasured on trained to elite athletesWritten before October 2026, being re-checked

Zhang, Gao & Gao pooled 20 studies (n=407 subjects) in endurance athletes comparing training with blood flow restriction (BFR) against the same training without BFR (databases searched through September 2024).

BFR training had moderate effects on VO2max (ES = 0.465, 95% CI 0.222-0.707) and endurance performance (ES = 0.693, 95% CI 0.252-1.135), a large effect on maximal strength (ES = 1.022, 95% CI 0.267-1.778) and a small effect on aerobic power (ES = 0.315, 95% CI 0.015-0.616).

Age, athlete level, training duration, frequency, type and cuff pressure did not significantly moderate the effects. The authors position BFR as a practical option when high-intensity training is less feasible, such as recovery phases or in-season maintenance.

Key Results

VO2max: ES = 0.465 (95% CI 0.222-0.707, P < 0.001) — moderate.
Endurance performance: ES = 0.693 (95% CI 0.252-1.135, P < 0.01) — moderate.
Maximal strength: ES = 1.022 (95% CI 0.267-1.778, P < 0.01) — large.
Aerobic power: ES = 0.315 (95% CI 0.015-0.616, P < 0.05) — small.
Subgroups: age, athlete level, training duration, frequency, type and cuff pressure were not significant moderators.

Practical Application

In 20 studies of endurance athletes (407 subjects), adding blood flow restriction to training improved VO2max (ES 0.465) and endurance performance (ES 0.693) moderately and maximal strength strongly (ES 1.022) compared with the same training without BFR; aerobic power gained only slightly (ES 0.315).
The effect did not depend on athlete level, training duration, frequency, type or cuff pressure in the subgroup analyses, so the finding is not tied to one protocol.
Best use, per the authors: periods when high-intensity training is less feasible — recovery phases, in-season maintenance, or when heavy gym loading is not available. It is an addition to training, not a replacement for heavy strength work or hard intervals when those are possible.
Not from this paper; the base's own practice: load (% 1RM), cuff time and session frequency for BFR are taken from the BFR consensus REF-566, not from this meta-analysis; heavy loading remains our default for the early-season strength block.

Limitations

Small trials (about 20 subjects per study on average, arithmetic on 407/20); wide confidence intervals, especially for strength; the abstract gives no heterogeneity statistics and no adverse-event data.
How this entry was checked and changed
Why this level

regraded 2026-09-27 from B+ (previously marked unverified): SR/MA of small trials (407 subjects across 20 studies), wide confidence intervals

Content correction 2026-09-27
Body still described the phantom "Gross et al. 2014" review (20-50% 1RM, "comparable to 70% 1RM", "$300-500 cuffs", "endurance application limited") -> replaced with the re-attributed Zhang, Gao & Gao 2025 meta-analysis: 20 studies, 407 endurance athletes, ES 0.465 VO2max, 0.693 endurance performance, 1.022 maximal strength, 0.315 aerobic power; no significant moderators.
"Endurance cycling application limited" -> the meta finds moderate aerobic and performance benefits in endurance athletes; direction corrected.
DOI line added from the entry's own re-attribution note; Level B+ [pending] -> A-; Tier N/A -> mixed Tier 2-4; Sport "cycling, strength" -> general.