Stand with feet shoulder-width apart holding a dumbbell with both hands. Hinge at the hips and slightly bend your knees, letting the dumbbell swing back between your legs while keeping your back flat. Drive your hips forward explosively to swing the dumbbell up to about chest or shoulder height. Keep your arms relaxed and let the power come from your hips, not your shoulders. Allow the dumbbell to swing back down naturally as you hinge again, controlling the motion, and repeat for the desired reps.
Log your dumbbell full swing sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.