Stand facing a stable support such as a bench, wall, or bar. Place your hands or forearms on the support at about shoulder height. Keeping your arms straight, gently lean your torso forward by hinging at the hips until you feel a stretch in your shoulders and arms. Hold the stretch for 20–30 seconds while breathing steadily, then return to the starting position. Repeat as needed.
Log your arms stretch on a support sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.