In this round-up of the two big spring marathons—Boston and London—Mike and Ross rate the performances of the top athletes while debating whether pacesetters should be used in major marathon events. The team then delve into the ultra-competitive world of shoe tech, where Mike gets to do a running economy test in a pair being touted as the world's fastest running shoes.

SHOW NOTES:

• Results of the testing done by the University of Massachusetts Amherst on Puma's Fast-R 3
• Study on how shoe mass affects running economy
• The study we discussed that shows how a 1.1% improvement in metabolic cost of running translates into a 0.78% improvement in performance
• The original Vaporfly study that got the ball rolling on the 4% benefit, for comparison of methods

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