Author of You Are Your Own Gym (Fit Ohne Geräte). Over 1 million books sold and 500k+ app downloads. Move Better. Live Better. As a former special operations instructor and bestselling fitness author, I merge skills-based training with fitness to change the way people move, look, and feel with minimal loss of time and energy. MISSION Our mission is to improve life performance by increasing the efficiency with which we handle those things most essential to health and happiness.