Deal with those rogue areas at the back of your arms with tricep dips. Using a coffee table or a chair, place your fingers in line with your shoulders with your bottom close to the table. Lift the right leg off the floor and hold it straight in front of you. Bend and straighten the arms, targeting the back of the upper arm. Complete 1 set of 12 with right leg out and then 1 set of 12 with the left leg out. Then place both feet on the floor and finish with another set of 12.