Professional Climber Alex Puccio's Weighted Single-Arm Pull-Up Has Us on Edge

View this post on Instagram A post shared by Alex Puccio (@alex_puccio89) Professional rock climber Alex Puccio just posted a video of herself completing a single-arm weighted pull-up on Instagram. The 11-time National Champion shared one of the exercises from her self-made training program to show the progress she’s made since her sternoclavicular (SC) joint…