Culture matters too. It isn't a coincidence that Bolt came from Jamaica, which has a tradition of high level sprinting. If he was born poor in the US, my guess

Culture matters too. It isn't a coincidence that Bolt came from Jamaica, which has a tradition of high level sprinting. If he was born poor in the US, my guess is he would have been a wide receiver or basketball player and only would have focused on running if it was clear he had no future in a more lucrative/higher status sport.