The Study
Comparison of low load blood flow restriction and high load resistance training of the finger flexors in advanced level climbers: a pilot study
This study tried two different ways to make climbers stronger and found that both worked about the same — but it only tested 19 people, so we can't be sure it would work the same for everyone. It doesn't prove one way is better, just that both might help.
Analysis score
Maximum 90 for a randomized controlled trial.
Where the score came from
Climbers trained their fingers either with light weights and tight bands (BFR) or heavy weights — both groups got stronger and climbed better.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 554 / 100
Quality score
Participants are randomly assigned to treatment or control groups, minimizing bias. The gold standard for testing whether an intervention causes an effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — gaining finger strength directly helped climbers climb more moves, even with lighter training, but it was very uncomfortable for some.
- 2Both groups got stronger: fingers improved by ~15 kg in grip strength, forearms grew ~0.7 cm, and climbers completed 10–14 more moves on a route.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Frontiers in Physiology
Year
2026
Authors
V. Andersen, Espen Hermans, Kristoffer Gunther Hansen, T. E. Solstad, A. Saeterbakken, J. Baláš, G. Paulsen, N. Stien
Related Content
Claims (6)
Muscle growth occurs when muscles are subjected to mechanical tension during resistance training, and this tension can be created by lifting heavy weights for few repetitions or moderate weights for many repetitions, as long as the set is taken close to the point of inability to continue.
Among experienced rock climbers, a training method that uses restricted blood flow with light weights produces the same gains in finger strength, forearm size, and climbing ability as traditional heavy weight training, even though the weights used are much lighter.
Among experienced rock climbers, stronger finger muscles are linked to better climbing performance, but other factors like technique and endurance also play important roles.
Among advanced climbers, a type of training called blood flow restriction causes 27% of participants to quit because it is uncomfortable, which may make it hard to use widely even if it works well.
In advanced climbers, two types of strength training—low-load with restricted blood flow and high-load resistance—did not increase the maximum force produced in a static pull-up, even though overall force improved. This suggests that peak force may not respond as well to these methods or may be harder to measure accurately.
In advanced climbers, two types of strength training—low-load training with restricted blood flow and high-load training—did not lead to better finger endurance after five weeks of training, when tested using a specific grip endurance task.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.