Dean Karnazes Quotes
Unlike running on a road or concrete, natural surfaces are more forgiving and offer a more varied terrain, ultimately resulting in less repetitive micro-trauma to bones and joints than running on hard pavement does.
Citations
Karnazes, Dean. Run! 26.2 Stories of Blisters and Bliss. Rodale, 2011.
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Dean Karnazes, is an American ultramarathon runner, and author of Ultramarathon Man: Confessions of an All-Night Runner, which details ultra endurance running for the general public.