If you’re not into the yoga mat and DVD, Adrenalastthere is always the option of a treadmill or an elliptical machine. If you have a small space, there are plenty of machines available today that fold into neat, compact shapes for easy storage. Elliptical machines and treadmills would allow you to get a great cardio workout. Almost all treadmills sold today can fold up for even easier storage. Slide it under your bed or stand it up…