Meta-analysis finds no clear benefit of adding nutrition to BFR training for strength or hypertrophy in healthy adults

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Frontiers in Medicine Published May 9, 2026 Medically reviewed May 9, 2026 Study authors: Bingran Zhao, Haiting Zhai DOI ↗ By Dr. Amelia Tan, PhD · Internal Medicine & Chronic Disease

Key Takeaway

Consider that adding nutrition to BFR training shows no clear benefit for strength or hypertrophy in healthy adults.

This systematic review and meta-analysis examined the effects of BFR training combined with nutritional interventions compared to BFR alone or BFR plus placebo in healthy adults. The analysis included a total sample size of 181 participants across a limited number of studies with small sample sizes and heterogeneity in supplementation protocols.

The primary outcomes assessed were maximal strength, muscular endurance, and muscle hypertrophy. For maximal strength, the standardized mean difference was -0.09 with a 95% CI of -0.37 to 0.20 and a p-value of 0.55, indicating no clear additional effect. Muscle hypertrophy showed a standardized mean difference of 0.31 with a 95% CI of -0.14 to 0.77 and a p-value of 0.18, also suggesting no clear additional effect.

Muscular endurance was associated with improvements, yielding a standardized mean difference of 0.90 with a 95% CI of 0.55 to 1.25. The p-value for this outcome was not reported. Safety data, including adverse events and tolerability, were not reported. The authors note that findings should be interpreted cautiously and advise against overstating long-term effects or mechanisms.

Practice relevance was not reported. The review does not provide data on population-specific responses for female and elderly participants. Clinicians should consider these limitations when evaluating the evidence for combining nutrition with BFR training.

Study Details

Study typeMeta analysis

EvidenceLevel 1

PublishedMay 2026

View Original Abstract ↓

Blood flow restriction (BFR) training induces muscle hypertrophy and strength gains under low-load conditions by restricting blood flow. While BFR reduces mechanical stress on joints, the associated metabolic stress and discomfort may limit training performance. Certain nutritional supplements may enhance BFR training effects, but the existing evidence remains inconclusive. To systematically evaluate the combined effects of BFR training and nutritional interventions on maximal strength, muscular endurance, and muscle hypertrophy in healthy adults. A systematic search was conducted in PubMed, Web of Science, Embase, Cochrane Library, and Scopus databases from January 2015 to December 2025, following PRISMA guidelines. Randomized controlled trials comparing BFR combined with nutritional interventions versus BFR alone (or BFR plus placebo) were included. Standardized mean differences (SMD) and 95% confidence intervals (CIs) were calculated using a random-effects model. Nine studies involving 181 healthy adults were included. Meta-analysis showed no clear additional effect of nutritional interventions on maximal strength (SMD = −0.09; 95% CI: −0.37, 0.20; p = 0.55) or muscle hypertrophy (SMD = 0.31; 95% CI: −0.14, 0.77; p = 0.18). Nutritional interventions were associated with improvements in muscular endurance (SMD = 0.90; 95% CI: 0.55, 1.25; p  Current evidence suggests that nutritional interventions may support fatigue resistance and enhance muscular endurance under BFR training conditions, but do not provide a clear additional benefit for maximal strength or hypertrophy. These findings should be interpreted cautiously due to the limited number of studies, small sample sizes, and heterogeneity in supplementation protocols. Further high-quality research is needed to explore long-term effects, mechanisms, and population-specific responses, including female and elderly participants.