Kristian Blummenfelt is the Data-Driven Future of Triathlon

In November, under stormy, tropical skies, reigning Olympic men’s triathlon champion Kristian Blummenfelt jumped from a pier into the Caribbean Sea. Then, after 7 hours 21 minutes 12 seconds, after swimming 2.4 miles, cycling more than 112 and running 26.2, he broke the tape to win the Cozumel Ironman in Mexico and become the fastest …