This study only looked at beginners doing one leg at a time, so we can’t say for sure if the same results would happen to experienced lifters or people training both legs together.
Scientific Claim
In untrained young men, the within-subject, unilateral design of this study limits generalizability to bilateral training or trained populations, as adaptations may differ under different conditions or with prior training experience.
Original Statement
“17 untrained young men... unilateral knee-extension resistance training”
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design supports claim
Appropriate Language Strength
definitive
Can make definitive causal claims
Assessment Explanation
The claim accurately reflects the study’s limitations as described by its design and population. No overstatement is present.
Evidence from Studies
Supporting (1)
This study only looked at untrained guys doing leg exercises with one leg at a time, so we can't say if the results would be the same for trained people or if they used both legs. That’s exactly what the claim says.