The Ultimate Body Press Doorway Pull Up Bar can also be used for push ups. You can use a wide grip, narrow grip or grip the curved portion of the bars for a parallel grip. Keep you back straight, tighten you glutes and suck your stomach towards your spine then lower your body as far as you can and return to the starting position with your arms straight.
As with the Dip Station, a narrow grip keeping your elbows close to your focuses resistance on your triceps while a wide grip uses more chest muscles. If the full plank exercise using the pull up bar is too difficult for you to complete ten, do as many as you can then do eccentric pushups or do them from your knees.