The Claim
In resistance-trained men, an 8-week resistance training program performed 4 times per week results in significant increases in vastus lateralis and rectus femoris muscle thickness (mean increases of 0.12–0.18 cm), with no statistically significant differences between fixed-exercise and randomly varied exercise protocols (p > 0.05, effect size < 0.2).
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.
If you're a guy who's already lifting weights, doing 4 workouts a week for 8 weeks will noticeably grow your thigh muscles — and it doesn’t matter whether you stick to the same routine or mix it up every time.
See the scientific wording
In resistance-trained men, an 8-week resistance training program 4 times per week produces large increases in vastus lateralis and rectus femoris muscle thickness (mean increases of 0.12–0.18 cm), regardless of whether exercises are fixed or randomly varied, with no statistically significant between-group differences (p > 0.05, ES < 0.2).
What the research says
1 studyThe study looked at whether switching up exercises or keeping them the same led to more leg muscle growth in trained men. Both methods worked equally well, which supports the claim.
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.