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Sports and the human brain: an evolutionary perspective
Ian J Wallace1, Clotilde Hainline2, Daniel E Lieberman1
1Department of Human Evolutionary Biology, Harvard University, Cambridge, MA, United States.
Handbook of Clinical Neurology
|November 29, 2018
Summary
Human brains evolved for constant physical activity, making them reliant on exercise for optimal function. However, evolutionary adaptations for larger brains also increased susceptibility to injury in contact sports.
Area of Science:
- Evolutionary biology
- Neuroscience
- Sports medicine
Background:
- Human brain evolution is linked to the demands of hunting and gathering.
- Natural selection favored endurance adaptations and large brains for complex environments.
Purpose of the Study:
- To explain the paradox of the brain's dependence on physical activity and its susceptibility to sports-related harm.
- To explore the evolutionary basis of brain function and injury risk.
Main Methods:
- An evolutionary perspective was applied to understand brain-activity relationships.
- The co-evolution of the human body and brain in the context of hunter-gatherer lifestyles was examined.
Main Results:
- Human brains require physical activity for optimal function due to evolutionary history.
- Excessive physical inactivity is poorly tolerated by the human brain.
- Increased brain size, advantageous for cognitive tasks, reduced tolerance to head impacts.
Conclusions:
- The human brain's reliance on physical activity is an evolutionary adaptation.
- Contact sports pose a risk to the human brain due to trade-offs between cognitive ability and physical resilience.
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