Exercise Advice: This exercise is the same as regular dumbbell triceps extensions, except that you will be using an exercise ball as the bench (see illustration). Once you are in the proper position, have your workout partner hand you the dumbbells so that you may begin the exercise. Start by having each dumbbell next to your head with your elbows pointed upward. Simultaneously press the dumbbells up toward the ceiling while keeping your elbows locked firmly in place throughout the entire movement. Return to the start position and repeat for the desired number of repetitions.