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Controlled-pace intervals are a great way to test your run fitness. Photo: John Segesta.

  • By Liz Hichens
  • Published Jun 8, 2009
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Controlled-pace intervals are a great way to test your run fitness. Photo: John Segesta.

Controlled-pace intervals are a great way to test your run fitness. Photo: John Segesta.

Liz Hichens is the Web Producer of Triathlete.com. She is an Ironman and marathon finisher and fan of all endurance sports.

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