Boulder, CO , United States



Sport Types
  • Triathlon
  • Road Cycling
  • Running
  • Mountain Biking
  • Cyclocross
  • Cross Country Skiing
  • Mountaineering
  • Speed Skating
  • Adventure Racing
  • Corporate Wellness
  • 1-on-1 Coaching
  • Consultations
  • Local Coaching
  • Remote Coaching
  • Strength Training
  • Mental Skills
  • Training Camps
  • Biochemical Analysis
Athlete Requirements
Athletes who are willing to train hard and rest harder.
Meet Your Coach
Charles 'Mac' Cassin
Charles 'Mac' Cassin
Boulder, CO United States 80303
Coach Bio

Mac specializes in time-crunched athletes and those recovering from significant injuries, two factors that have continuously played a roll in his own training.

In addition to one-on-one coaching, Mac also offers customized plans ranging from 3 months to 12 months in length for those who want optimized training without the greater commitment of monthly coaching.

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Mac Cassin is the Head Physiologist of Sports Science at Wahoo Fitness. He holds a degree in Integrative Physiology from the University of Colorado-Boulder and has won multiple National Championships on the Track.

The experience of juggling athletic goals with collegiate and career responsibilities has taught Mac that peak performance is achievable even for those who cannot focus exclusively on training.

While concentrating on exercise physiology in an academic setting, Mac competed at the World Championships, Pan American Championships and World Cups on both the road and track.

Preferred Athlete Levels
Beginner, Intermediate, Advanced, Professional
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Boulder, CO
United States