An Easy Guide To Heart-Rate Training
3:53
Added: 1 year ago
From: ExperienceLifeMag
Views: 450
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  • anaerobic threshold, or AT (the point at which your body starts to use significantly more sugar than fat for fuel)

    billyyboy4 5 months ago

  • 3:53 minutes later and i still don't know what "A T" means.

    1cleandude 8 months ago

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