TRX: Randy Hetrick : How I Built This with Guy Raz In 1997, Navy SEAL Randy Hetrick was deployed in Southeast Asia, where he was stationed in a remote warehouse for weeks with no way to exercise. So he grabbed an old jujitsu belt, threw it over a door, and started doing pull-ups. Today, TRX exercise straps dangle from the ceiling in gyms across the country and are standard workout gear for professional athletes. PLUS in our postscript "How You Built That," we check back with a husband-and-wife team who experimented with fruit, spices and vinegar and came up with a gourmet ketchup line called 'Chups. (Original broadcast date: June 26, 2017).