ProForm’s Smart Tone elliptical lets you get in an effective, low-impact workout at home, and it folds up and wheels away whenever you need extra space. But its increased portability doesn’t translate into fewer features. In addition to 16 resistance levels, the elliptical comes preprogrammed with 18 workout apps and a built-in eight-week weight-loss program to keep you on track. As you stride, the large LCD screen displays important stats, including time and calories burned. Grab the dual-grip EKG heart-rate monitor to make sure you’re still alive and in your target range.