Spreading your workouts across more days per week can help you get stronger, but after a certain point, adding even more days doesn’t help much more.
Scientific Claim
Higher resistance training frequency is associated with greater strength gains in young, primarily male, trained individuals, with evidence of diminishing returns at higher frequencies.
Original Statement
“In contrast, the posterior probability for strength was 100%, suggesting strength gains increase with increasing frequency, albeit with diminishing returns.”
Evidence Quality Assessment
Claim Status
overstated
Study Design Support
Design supports claim
Appropriate Language Strength
association
Can only show association/correlation
Assessment Explanation
The use of 'suggesting strength gains increase with increasing frequency' implies causation. The study design cannot confirm this due to unknown randomization in source studies.
Evidence from Studies
Supporting (1)
The Resistance Training Dose Response: Meta-Regressions Exploring the Effects of Weekly Volume and Frequency on Muscle Hypertrophy and Strength Gains.
More frequent weight training helps young, trained people get stronger, but after a certain point, doing even more sessions doesn’t help much more — the study proves this with solid data.