Stand upright with feet about shoulder-width apart and raise both arms overhead. Interlock your fingers or keep your hands parallel with palms facing upward. Fully extend your arms toward the ceiling while keeping your shoulders down and away from your ears. Gently reach upward as if trying to lengthen your entire body, maintaining a neutral spine and engaged core. Hold the stretch for 15–30 seconds while breathing steadily, then relax and repeat as needed.
Log your extension of arms in vertical stretch sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.