Former NBA player and head coach John Lucas has made a name for himself as a player development guy. Lucas currently works for the Houston Rockets; before that he’s been a trainer to many players around the league and even some non-pros.

Lucas was training a player once, so the story goes, and the player was kind of winded. As basketball players do when fatigued, the player bent over, grabbing his shorts as he sucked in oxygen.

“Stand up!” Said Lucas. “Never let the workout know it’s kicking your butt.”