Biomechanist Katy Bowman argues that our fitness mindset has environmental consequences in her new book, Movement Matters.

What If We Got Exercise All Wrong?

Participant jumps from a four meter high platform into water during the Tough Mudder endurance race in Henley on Thames, West of London, on April 26, 2014. The course is set out over 10-12 miles (18-20 km) with 20 obstacles. (Photo: Justin Tallis/AFP/Gett