rs1815739(C;T)

Mix of muscle types. Likely sprinter.

Magnitude
2.1Worth knowing
Repute
Good
Frequency
43%Average of 11 populations
On SNPedia
rs1815739(C;T)
Gene
ACTN3

Frequency

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

  • Japanese (Tokyo)62%
  • Mexican ancestry (Los Angeles)59%
  • European ancestry (Utah)58%
  • Gujarati Indian58%
  • Tuscan54%
  • Han Chinese (Beijing)45%
  • Chinese (Denver)39%
  • African ancestry (Southwest US)37%
  • Maasai (Kenya)31%
  • Yoruba (Nigeria)20%
  • Luhya (Kenya)14%

Other genotypes of rs1815739

  1. C;CMost notableGoodBetter performing muscles. Likely sprinter.Worth knowing · 2.242% of people
  2. T;TNot ratedImpaired muscle performance. Likely endurance athlete.Worth knowing · 2.214% of people

All about rs1815739

Notes

From SNPedia

Normal for white people. One working and one defective copy of the gene for alpha-actinin-3 in fast-twitch muscle fibres. This genotype may indicate somewhat impaired muscles, however many sprinters and some endurance athletes have this.

References

Source and license

Adapted from rs1815739(C;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 Its entries can be incomplete, out of date or wrong, and nothing here is a diagnosis or medical advice.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.