Fitness and Adventure: How triathlete Timothy O’Donnell trains smart with data

Fitness and Adventure on SI.com

How triathlete Timothy O’Donnell trains smart with data

Triathlete Timothy O’Donnell uses a heart rate monitor, 520 Edge cycling computer​, Garmin Forerunner 920XT​ and other data-tracking gear to help his training for swimming, running and cycling.

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