rs1815739(T;T)

Impaired muscle performance. Likely endurance athlete.

Magnitude
2.2Worth knowing
Repute
Not rated
Frequency
14%Average of 11 populations
On SNPedia
rs1815739(T;T)
Gene
ACTN3

Frequency

Share of people with T;T in each HapMap population.

  • Gujarati Indian29%
  • Mexican ancestry (Los Angeles)26%
  • European ancestry (Utah)22%
  • Chinese (Denver)21%
  • Han Chinese (Beijing)20%
  • Japanese (Tokyo)18%
  • Tuscan18%
  • Maasai (Kenya)5%
  • Yoruba (Nigeria)0%
  • African ancestry (Southwest US)0%
  • Luhya (Kenya)0%

Other genotypes of rs1815739

  1. C;CMost notableGoodBetter performing muscles. Likely sprinter.Worth knowing · 2.242% of people
  2. C;TGoodMix of muscle types. Likely sprinter.Worth knowing · 2.143% of people

All about rs1815739

Notes

From SNPedia

Early reports such as suggested this is under-represented in elite strength and sprint athletes, consistent with previous reports of impaired muscle performance. However this is more common in endurance athletes. This SNP makes fast-twitch muscle fibers completely unable to produce alpha-actinin-3. In 2016 a larger attempt at replication failed to find any signficant result

References

Source and license

Adapted from rs1815739(T;T) on SNPedia, using a snapshot taken October 16, 2026. SNPedia content is shared under CC BY-NC-SA 3.0 US, and this page is shared under the same license.

SNPedia is a community-edited wiki. Its entries can be incomplete, out of date or wrong, and nothing here is a diagnosis or medical advice. Magnitude is a community rating of how interesting a genotype is, not a risk score.