One Arm Handstand Hold Exercise
1. Get into the usual handstand press up position propping your feet up against a wall or post.
2. Lift one hand off the floor and hold for as long as possible (try aiming for a minute at least).
For variety try holding a dumbell in the free hand for added weight. This is a great power building exercise and will enable you to do handstand press ups with ease. You can also try the one arm hold in most of the other exercises such as the press up, though slightly easier they work different muscle groups.