COMPLEXITY

Daniel Lieberman on Evolution and Exercise: The Science of Human Endurace

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Aug 3, 2022
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INSIGHT

Sweating Made Humans Hot-Weather Endurance Champions

  • Humans uniquely combine endurance running with high heat tolerance enabled by efficient sweating.
  • Whole-body sweating and increased skin blood flow let humans perform vigorous exercise in hot conditions better than other mammals.
INSIGHT

Scavenging Laid Groundwork For Hunting By Running

  • Scavenging likely initiated selection for fast locomotion and running then enabled active hunting later.
  • Early hominins used running to reach carcasses quickly and later developed strategies to hunt and become effective carnivores.
INSIGHT

Skull Anatomy Helps Cool The Brain During Exercise

  • Human cranial features and facial sweating form countercurrent cooling systems to protect the brain during exertion.
  • Enlarged cavernous sinus, scalp sweating, nasal heat exchange and increased cerebral blood flow help keep brain temperature down while running.
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