Bio: Your New P.E. Teacher 🫱🏾‍🫲🏻 I Help People Become STRONGER HUMANS📈 BJJ Black Belt & 2x World Champion 🌎 My site has all the tools you need 💪🏽

Bio: Chris Duffin is a freakishly strong, crazy engineer, who likes testing the limits of physicality, intellect, and creativity.

Bio: MST Systems

Bio: Physiology Education