HOW: Start by sitting on an elevated surface. Bring a dumbbell up with both hands and hold one end of it with both hands. The dumbbell should be above your head and slightly behind you. Keeping your elbows in towards your head, bend at the elbow and lower the dumbbell. Once it can’t be lowered anymore, pull it back up to the starting position.
FEEL: You should feel your triceps muscle working.
COMPENSATION: Keep your core engaged, don’t arch your back as you lower the dumbbell behind your head.