In 1951 essayist Norman Cousins wrote: “The hand that is dealt you represents determinism. The way you play your hand represents free will.” He was writing about the nature of man, but it’s not unreasonable to extrapolate his thoughts to the part that our genes play in our health.
The genetic material we inherit from our parents may be a blueprint, an instruction book used to build our body and to keep it running, but – for most of us – it doesn’t determine our fate completely.
Source: Genetics: Risk or Destiny?
Disease is one aspect; athleticism is another. I’ll never be an elite athlete, but that won’t stop me from enjoying a hobby.