Whether you do CrossFit or lift weights regularly, your thigh muscles end up about the same size after years of 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

Similar Assertions

People who do CrossFit and people who lift weights end up with about the same size leg muscles after years of training — the type of workout doesn’t seem to change muscle growth much.

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