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Commentary on “Autonomic and behavioural thermoregulation in tennisAutonomic and behavioural thermoregulation in tennis”
  1. Timothy Noakes
  1. T Noakes , Department of Human Biology, Sports Science Institute of South Africa, University of Cape Town, South Africa; tdnoakes{at}

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Over 100 years ago, biologist Charles Morris proposed the revolutionary idea that humans evolved as hot weather hunters. Today it is increasingly accepted that we Homo sapiens owe our big brains (and our ability to undertake science) to our sweaty, hairless, long-legged torsos that allowed our (then small-brained) ancestors to outrun antelope in the midday heat on the sultry African savanah starting perhaps 2 million years ago. Studies of modern hunters in the Kalahari desert in Southern Africa suggest that these hunts were most successful when held in dry- bulb temperatures of 40–46°C. Often these hunts can …

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