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Inside Kona’s Natural Energy Lab

  • By Triathlete.com
  • Published Oct 2, 2014
  • Updated Oct 2, 2014 at 5:15 PM UTC

You’ve heard of the Energy Lab section of the Ironman World Championship marathon course, but do you know why it’s earned the reputation of being the toughest part of the race? Find out why in the video above.

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