"Top of the Class." Oxygen readers voted the StreetStrider the best overall cardio machine.
It's easy to see why: It's a low-impact aerobic workout with upper- and lower-body elements and a low learning curve. This scooter-like ride boasts alternating upper body levers, smooth striding platforms and scorches impressive calories – up to 1,000 per hour.
Bonus: It's a new, fun way to travel green to work.