dumbbell around pullover

Lie flat on a bench with your head at one end and your feet firmly on the ground.

Hold a dumbbell with both hands and extend your arms straight above your chest.

Keeping your arms straight, slowly lower the dumbbell behind your head in an arc motion.

Pause for a moment at the bottom, then raise the dumbbell back to the starting position.

Repeat for the desired number of repetitions.