Working out with weights three times a week for 10 weeks makes you better at doing more reps — but how much better depends on whether you used heavy or light weights.
Scientific Claim
Resistance training performed three times per week for 10 weeks to volitional fatigue improves muscle endurance in untrained young women, with the magnitude and specificity of improvement depending on the training load used.
Original Statement
“AME improved in a manner specific to the training loads used.”
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design supports claim
Appropriate Language Strength
probability
Can suggest probability/likelihood
Assessment Explanation
The claim is a direct summary of results and supported by the RCT design. However, due to small sample and unverified methods, probabilistic language is recommended.
More Accurate Statement
“Resistance training performed three times per week for 10 weeks to volitional fatigue is likely to improve muscle endurance in untrained young women, with the magnitude and specificity of improvement depending on the training load used.”
Evidence from Studies
Supporting (1)
Higher- and lower-load resistance exercise training induce load-specific local muscle endurance changes in young women: a randomised trial.
When women trained with heavy weights, they got better at lifting heavy weights; when they trained with light weights, they got better at lifting light weights—so the type of training shaped what they got better at.