Stand upright with feet shoulder-width apart holding a dumbbell in one hand with an overhand grip. Keep your chest up and core braced. Lift the dumbbell vertically by leading with your elbow, keeping the weight close to your body until it reaches around chest level. Pause briefly, then slowly lower the dumbbell back down under control. Repeat on the other side.
Log your dumbbell one arm upright row sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.