Resources » ACTN3: Can Genetics Tell Me if I am Going to be an Olympic Sprinter?
Rear view of a sprinter on a blue running track with his feet in starting blocks.
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Can genetic technology be used to predict athletic performance or enhance the safety of athletes?
What are the limits to using genetics in this way? What are some of the other factors to think about when we think about athletic talent?

As the genetic basis for certain health conditions is revealed, some doctors, coaches, and academic and athletic organizations are wondering whether genetic testing can provide health and safety benefits for athletes. Can genetics help minimize the risk of injury, or help a young person find the sport that is right for them? ACTN3 is a gene that encodes for the Alpha-actinin-3 protein. This protein is involved in contractions of skeletal muscles and is often referred to as the “speed gene” in the media. Could one gene be responsible for being a faster runner? How can we understand the contribution certain genes, or groups of genes, might have toward complex traits such as athleticism?

Last reviewed February 2025.

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