Whether you have the 'speed gene' (RR) or not (XX), your muscles recover and stop getting as sore after doing jump training twice — your genes don’t change how well you bounce back.

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Pro

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Against

Evidence from Studies

Supporting (1)

37

Community contributions welcome

37

Human alpha-actinin-3 genotype association with exercise-induced muscle damage and the repeated-bout effect.

Cross-Sectional Study

Human

2012 Dec

Both groups of people — with or without the ACTN3 gene variant — got less sore and recovered better the second time they did the same jump exercise, and this improvement happened the same way for both groups. So the gene doesn’t change how well your body adapts to repeated exercise.

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

Human alpha-actinin-3 genotype association with exercise-induced muscle damage and the repeated-bout effect.

Score: 37

DOI: 10.1139/h2012-087

Similar Assertions

People with a specific version of the ACTN3 gene (the R version) tend to get much more muscle sore and weak after jumping exercises and take longer to bounce back than people with the other version (the X version), like their muscles just can’t handle the stress as well.

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79%

People with a certain version of the ACTN3 gene bounce back faster after intense workouts that strain muscles, like downhill running, so they might be able to train more often without getting as sore.

37

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77%