Working a speed bag can give your body a good workout. The EZspeedbag is a portable doorway speed bag you can install in your home fast to work on your boxing or MMA game. It helps you improve your punch timing and accuracy. You can also use this as a pull-up bar to work more muscles in your body.
The EZspeedbag fits doorways from 27 to 42″. You can find out more about it here.