When you think about a manual treadmill, you might think of Fred Flintstone running on slabs of rock. Today, the best manual treadmills are pretty incredible. They are user-friendly, energy-efficient, burn more calories, and are oftentimes cheaper machines than their motorized counterparts.
If you're in the market for a new piece of exercise equipment and are trying to decide between a treadmill, elliptical, or bike,...
