Stand with your feet hip-width apart and a slight bend in your knees. Hold a dumbbell in each hand, palms facing each other. Let the dumbbells rest by your sides. Roll your shoulder blades back and down your spine. This is your starting position.
Keeping your elbows close to your sides, slowly raise the dumbbells up to your shoulders.
Press the dumbbells straight up overhead, keeping your arms by your ears. Do your best to lift the weights straight up so they come to a stop directly above your shoulders, and make sure your back doesn't arch.
With control, bend your elbows and bring the weights back down to your shoulders. Then, lower the weights down to your sides.
This counts as one rep. Continue with this exercise for one minute.