U.S. Air Force Senior Airman Jossue Grijalva of the 163d Operations Support Squadron, 163d Attack Wing, California Air National Guard, runs on a treadmill while trying out stability running shoes for the first time during a running clinic, March 2, 2019, in the fitness center at March Air Reserve Base, California. Moments earlier, Grijalva had his gait analyzed by running professionals, who suggested he switch from neutral ride running shoes to stability shoes. (U.S. Air National Guard photo by Senior Airman Crystal Housman)