This analysis combined data from 67 different studies with over 2,000 mostly young male lifters, so the results represent a broad average across many different training styles.
Scientific Claim
The study’s findings are based on 67 studies involving 2058 participants, primarily young, recreationally or well-trained males, and the results reflect aggregated data from heterogeneous training protocols.
Original Statement
“utilizing 67 total studies of 2058 participants (79.1% male, 20.9% female; average age 25.16 ± 5.22 years)”
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design supports claim
Appropriate Language Strength
association
Can only show association/correlation
Assessment Explanation
The claim is a factual description of the study’s sample size and composition, directly drawn from the methods section and appropriately neutral in language.
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
This study looked at many different workout routines from hundreds of mostly young men and found that more lifting generally builds more muscle and strength, but with diminishing returns — and it accounted for all the different ways people train.