Q Why do my elbows hurt when I do pull-ups, but not with chin-ups? MD
This goes back to your biceps, because pretty much everything is connected. Pull-up (palms out) pain is fairly common, says Dr Nicholas Dinubile, because oftneglected forearms take a big load. Too much stress on forearm muscles can lead to tennis elbow, an inflammation of the elbow tendons that connect to those muscles. Both sides of the elbow will hurt. When you switch to palms in, your biceps help more, relieving forearm stress. Try strengthening your forearms with wrist-extension exercises. Good form will help, too. Follow these tips to nail both moves: Grasp the bar and hang at full extension, chest proud. Slowly pull your chest into the bar, keeping your elbows pointed at the floor. Control yourself back down to full extension and repeat.