Arnold Shoulder Press
Start: hold a pair of dumbbells at shoulder height.Begin with with your palms facing toward your shoulders and your elbows down and forward.
Move: push the weights straight up till they reach eye level. Lower the dumbbells to an overhead press position and lift them again pronating your hands so that your palms are facing forward at full arm extension. Control the dumbbells all the way back in the reverse motion to the starting position.
P.S. the exercise is very effective as the time under tension is grater than a normal overhead press, not because is called Arnold. For more info about personal training in London contact Samuel at: firstname.lastname@example.org