How much of muscle mass is hereditary?
Explore the genetic variants associated with lean mass and muscle mass.
Muscle mass is measured as lean mass or appendicular lean mass (arms and legs). Twin studies estimate that heritability is substantial — and genome-wide studies have linked over a thousand genetic loci to muscle mass.
What the analysis shows
DNAHelper shows which muscle-associated variants your raw file contains and what research has linked them to. The result is an association — not a measure of your strength or training potential. The analysis is based on the traits lean body mass, appendicular lean mass (2401 associated variants, strong evidence strength).
Which variants matter
Muscle mass is extremely polygenic — hundreds of loci spread across the genome contribute, many near genes that govern the development and maintenance of muscle tissue. No single variant makes a noticeable difference.
Most variants affect the baseline capacity of skeletal muscle rather than specific athletic abilities.
What research has actually found
Large GWAS meta-analyses have linked over a thousand loci to lean mass and limb muscle mass. The links are robust but each explains very little on its own.
The combined genetic signal says something about average predisposition — not where your personal ceiling lies.
What matters more than genes
Strength training, protein intake, sleep and activity level across the whole life course determine muscle mass in practice. Age and hormones also matter greatly — sarcopenia (age-related muscle loss) affects most people.
Genetic differences can influence your starting point and how you respond to training, but training is the dominant factor.
What the result means — and does not mean
The analysis is based on the traits lean body mass, appendicular lean mass (strong evidence strength). Associations are statistical — they describe populations, not destinies. Read how we grade evidence in our methodology.
Privacy: your file never leaves the browser
You pick your raw file locally — it is parsed and analysed entirely in your browser and is not uploaded for the standard analysis. The only exception is the optional DNA Chat feature where you, after explicit consent, can share selected variants. Read the privacy policy · What happens to your DNA file?
Compatible raw files
Works with raw data exports from MyHeritage, 23andMe, AncestryDNA and FamilyTreeDNA (.txt, .csv, .zip). The download guides show exactly where to find the file at your provider — and the file formats are explained here.
Also read: Method & science · All analyses · All traits · Grip strength and genes