People who have been doing serious workouts like CrossFit or weightlifting for years have bigger leg muscles than people who just stay active without formal training.

Pro

Against

Evidence from Studies

Supporting (1)

Community contributions welcome

Muscle power and muscle hypertrophy of the lower limbs among practitioners of functional fitness training and strength training

Cross-Sectional Study

Human

Contradicting (0)

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No contradicting evidence found

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

Muscle power and muscle hypertrophy of the lower limbs among practitioners of functional fitness training and strength training

Score: 54

DOI: 10.1007/s11332-023-01108-1

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