The Sports Gene: Inside the Science of Extraordinary Athletic Performance

The Sports Gene: Inside the Science of Extraordinary Athletic Performance By David Epstein

Core Idea: Athletic achievement is shaped by a complex interplay of genetics and environment—nature matters as much as nurture.

Key Themes:
1) Genes provide raw potential: Traits like ACTN3 variants, height, and muscle composition affect performance
2) Training molds ability: Practice develops perceptual skills (“chunking”), not just physical traits.
3) Population effects: Example: Kenyan runners' body types serve endurance; Jamaican sprinters' physique supports speed.

You can’t out-train your genetics in certain traits—but smart, personalized training does matter.


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