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The best running watch, headphones, and more high-tech must-haves.
Marijuana boasts incredible benefits for ultramarathoners.
Gary Johnson on the gnarliest race in the world.
Scott Dixon and Tony Kanaan talk fitness and racing.
Plus more of today's top health and science headlines.
Interview with MotoGP rider Nicky Hayden.
What to watch for at the Breeder's Cup.
Tweak your strength training to fit your race plan.