The Claim
Type II muscle fiber area does not change following either blood flow-restricted resistance exercise or conventional resistance training in national-level powerlifters.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
For top powerlifters, two types of weight training—one that restricts blood flow and one that doesn't—both leave fast-twitch muscle fibers the same size after training.
See the scientific wording
Type II muscle fiber area remains unchanged following both blood flow-restricted resistance exercise and conventional training in national-level powerlifters.
What the research says
1 studyStudy: Type 1 Muscle Fiber Hypertrophy after Blood Flow–restricted Training in Powerlifters
The study looked at the same exercises and athletes as the claim and found that type II muscle fibers didn't get bigger with either training method, just like the claim says.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.