Stand up straight with feet at shoulder-width apart, hold one dumbbell in right hand, raise the dumbbell to head height, right elbow out and 90 degree, right forearm should be perpendicular to the floor, right palm facing leftward. That is your starting position
Extend through your right elbow to raise the dumbbell until it touch at the top
Then, slowly lower the dumbbell back together to the starting position
Repeat the same movement with your left arm
Breathe out when raising and in when lowering
Tips:
Keep your upper body and legs stationary during the whole process, and do not jerk your upper body or use leg-drive to help you raise the dumbbells
