The Claim
In untrained adults, 6 weeks of resistance training using either low-load blood flow restriction or high-load protocols leads to proportional increases in both myofibrillar and non-myofibrillar areas within muscle fibers, preserving a myofibrillar-to-non-myofibrillar area ratio of approximately 86% to 14%, which indicates conventional hypertrophy rather than sarcoplasmic expansion.
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.
When new people start lifting weights — whether with light weights and restricted blood flow or heavy weights — their muscle fibers grow evenly inside, keeping the same balance between the parts that contract and the rest. This means their muscles grow the usual way, not by just filling up with fluid.
See the scientific wording
In untrained adults undergoing 6 weeks of resistance training, both low-load blood flow restriction and high-load resistance training are associated with proportional increases in myofibrillar and non-myofibrillar areas within muscle fibers, maintaining a ratio of approximately 86% myofibrillar to 14% non-myofibrillar area, indicating conventional hypertrophy rather than sarcoplasmic expansion.
What the research says
1 studyThe study found that both light weights with blood flow restriction and heavy weights increase muscle size in a balanced way, with no extra fluid buildup, 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.