The Claim
High-load resistance training performed three times per week for six weeks significantly increases type II myofiber cross-sectional area by approximately 11.6% in untrained males and females, with moderate to large effect sizes (Cohen's d=0.31-0.59), indicating preferential hypertrophy of fast-twitch muscle fibers.
What the research says
Not yet evaluated
We are still looking at what the research says.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Lifting heavy weights three times a week for six weeks makes fast-twitch muscle fibers grow bigger by about 12% in people who don't usually exercise, showing it especially targets these powerful muscles.
See the scientific wording
High-load resistance training performed 3 times per week for 6 weeks significantly increases type II myofiber cross-sectional area by approximately 11.6% in untrained males and females, with moderate to large effect sizes (Cohen's d=0.31-0.59), indicating preferential hypertrophy of fast-twitch muscle fibers.
Score breakdown, mechanism chain, raw evidence, ideal studies needed
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.