The Claim
Experienced resistance-trained men can achieve significant increases in maximal strength, specifically 7.7% to 11.5% in one-repetition maximum (1RM) for squat and bench press, over an 8-week training period when performing either two or four weekly sessions per muscle group, as long as total weekly training volume is equated, indicating that both training frequencies are effective for enhancing strength in this population.
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 been lifting weights for a while, doing either 2 or 4 workouts per week for each muscle can boost your strength by about 8–11% in just 8 weeks—as long as you do the same total amount of work overall.
See the scientific wording
Experienced resistance-trained men can achieve significant increases in maximal strength—approximately 7.7% to 11.5% in 1RM squat and bench press—over an 8-week period with either two or four weekly sessions per muscle group, provided that total weekly training volume is maintained, demonstrating that both frequencies are effective for strength development in this population.
What the research says
1 studyStudy: Effects of training frequency on muscular strength for trained men under volume matched conditions
The study found that lifting weights twice or four times a week gives similar strength gains if you do the same total amount of work, 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.