John Holt holds personal training certifications from the International Sports Sciences Association and the National Council on Strength and Fitness. He is also an IHP Level 2 Certified MMA Conditioning Coach and a certified sports nutritionist who has spent more than 20 years coaching assorted combat forms, including Systema, Kali, Silat, Muay Thai, Sambo, Wing Chun, and Boxing.
About Lauren Keary
Lauren Keary is a running and boxing enthusiast, contributing to BuzzFeed, Women’s Running, Fitt, Outside, TripSavvy, the Evening Standard, and Modern Luxury on topics related to fitness, lifestyle and travel.