A gene for endurance

One copy of a particular version of the ACE gene has been found more often in elite endurance athletes, and every climber tested to date who has ascended over 8,000m. Your FitnessGenes result tells you whether you carry this endurance version, the alternative power/strength version or both.

The ACE gene was the first to be linked to athletic performance and has been one of the most extensively studied genes in sport.  It comes in two forms: a long version (the I allele) and a short version (the D allele). Increased endurance potential has been strongly linked with having two copies of the long version (II).  In contrast, having two copies of the short version (DD) has been associated with power/strength, although this link does not appear as strong.

The ACE gene is part of a complex hormonal system which affects numerous tissues in our bodies and is important in regulating our blood pressure and fluid balance among many other roles.  The fact this system affects multiple tissues makes it difficult to pinpoint the exact effects that the different genotypes are having, but there are trends in the research that help us make our recommendations.

While the effect of the ACE gene seems more pronounced in elite level athletes than in untrained or non-highly trained individuals, the scientific research still gives clues as to how individuals with different ACE genotypes may perform or respond to different types of exercise or training strategies.

You can find more information about the ACE gene in our member area at where you can also find your results and what this means for you after your DNA has been analyzed by us. Head over to the shop to order your Fitnessgenes DNA analysis and genetic training system


We have fully reviewed the impact of this gene and the genetic variant we analyse as part of our scientific research process. You can access the full citation list on all studies reviewed here.

Sign up to our newsletter

Keep up to date with the latest gene releases, scientific research and training news from FitnessGenes by subscribing to our weekly newsletter. Exclusive science and training articles from the FitnessGenes team and guest writers will help you understand the full potential of unlocking your Fitness DNA.

FitnessGenes HIIT ebook

Free Fitness ebook

In this FitnessGenes exclusive series E-Book, Dr. Daniel Reardon and Mark Gilbert provide you with a guide to High Intensity Interval Training.

Use Facebook to sign up to our newsletter and receive your free ebook