The GO2 breathing device has been swamping social media advertising with bold claims about how using it can dramatically improve performance. What is this device and how is it supposed to work? More importantly is there any evidence that it will do what it's makers claim? Part 2 of my interview with medical students and IM athletes Beth Ashinsky and Elisabeth Sorenson on balancing busy academic lives with training and racing triathlon. And, Reels for Wheels returns for a second season with a review of the 2nd and 3rd chapters of the John Wick movies.

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