Natural talent is often credited to hard work, training, or even luck. But new research suggests the real source of your athletic ability might go back much further—before you were even born.
A growing body of studies is pointing to the role of maternal influence in shaping endurance and performance, particularly through something called mitochondrial DNA. Unlike most genetic material, which is inherited roughly 50 percent from each parent, mitochondrial DNA is passed down exclusively from the mother and plays a key role in how your body produces energy.
That matters for endurance. Mitochondria are responsible for powering your muscles, especially during sustained activities like running, cycling, or swimming. Some researchers describe it as an “engine” you inherit, one that can influence how efficiently your body uses oxygen and produces energy over time.
The impact may start even earlier than genetics.
Studies also highlight the role of prenatal development, suggesting that a mother’s activity level during pregnancy can influence a child’s future athletic capacity. In some cases, maternal exercise has been linked to improved cardiovascular development and increased mitochondrial density in the fetus, essentially giving the body a head start before birth.
But the picture is not one-sided.
Athletic ability is what scientists call a “polygenic trait,” meaning it is influenced by many genes working together, not a single inherited factor. In fact, research suggests genetics overall account for anywhere between 30 percent and 80 percent of the differences in athletic performance between individuals.
And those genes come from both parents.
Each person inherits roughly half of their DNA from their mother and half from their father, including genes linked to strength, speed, and muscle composition. Factors like the ACTN3 gene, often associated with sprint performance, can come from either parent and influence how muscles function.
Beyond genetics, environment still plays a major role. Training, nutrition, and consistency ultimately determine how much of that potential is realized. Some studies suggest that even if you inherit strong genetic traits, performance can still vary widely depending on lifestyle and effort.
In that sense, the idea that athleticism comes from one parent is too simple. There may be a measurable maternal advantage in areas like endurance and energy production, but performance is built from a combination of biology and behaviour.
So while your ability to run faster or last longer might be influenced by your mom in ways you did not expect, it is not the full story.
Talent may start with genetics. But what you do with it is still up to you.