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Coach Details

Martha Grinnell

MG Health and Multi-Sport Coaching

Williamsburg, MA

[email protected]



Martha creates personal and progressive training programs for triathletes, cyclists and runners of varying fitness levels and experience. She's worked with those who aren't sure where or how to begin their process, as well as seasoned athletes who have made their way to the podium at the Hawaii Ironman.

Sprint, Olympic, Half Ironman, Ironman distance triathlon training/preparation.  5k, 10k, half marathon, marathon training/preparation.  Nurtrition for peak performance in training and racing. 

Martha has been coaching and consulting since 1992. She holds a BS in Health and Fitness from Springfield College and a MS in Exercise and Sport Studies from Smith College. She also holds certifications as a health coach from ACE, a triathlon coach from USA Triathlon, and as a personal trainer through ACSM.

Other Accomplishments:

  • 4x Female Athlete of the Year | Springfield College
  • All American – Cross Country | NCAA Div II Championships
  • Inducted into the Springfield College Athletic Hall of Fame
  • Inducted into the Northeast 10 Cross-Country Conference Hall of Fame
  • Inducted into the Williston Northampton School Hall of Fame
  • Co-Coach for the 1996 National Junior Triathlon Team Camp
  • Qualifier for the 2000 Triathon Olympic Trials
  • 7th place over all female finish at the 1997 Hawaii Ironman
  • 4x member of the Women’s Pro  USA World Triathlon Championship Team
  • Happy mom of two French Bulldogs