No matter how many sets trained men do — 5 or 20 — their muscles grow about the same size after 6 months.
Scientific Claim
Muscle hypertrophy in trained men shows no significant difference across resistance training volumes of 5 to 20 sets per muscle group per week over a 24-week period.
Original Statement
“There were no group by time interaction for any MT measure.”
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design cannot support claim
Appropriate Language Strength
association
Can only show association/correlation
Assessment Explanation
The claim uses neutral language and directly reflects the abstract’s statistical finding of no interaction. No causal inference is made, and verb strength is appropriately conservative.
Evidence from Studies
Supporting (1)
Evidence of a Ceiling Effect for Training Volume in Muscle Hypertrophy and Strength in Trained Men - Less is More?
Even when trained men did 5 sets or 20 sets per week, their muscles grew about the same size — doing more didn’t help them get bigger.