When you are standing backstage at a prestigious powerlifting meet like Powerlifting United’s American Pro meet in the Henrico Sports and Events Center, smelling the sting of ammonia and hearing the low-frequency thud of loaded barbells hitting rubber flooring, you begin to understand a fundamental truth about strength sports: months of preparation ultimately come down to your ability to execute when all eyes are on you. On August 7 and 8, the a…