It's not the same as running. A range of customized workouts. Advanced treadmills come with built-in training programs that, with the push of a few buttons, operate on automatic pilot during a workout. Excellent heart-rate monitoring. Pa. Top-notch injury prevention.
Good treadmills provide a firm but forgiving ride.
That is, they're easier on the legs than concrete and asphalt. Indeed, some makers of low-impact treadmills claim a shock reduction of 40 percent compared to running on roads. Simplified marathon training. In between these two extremes are thousands of runners who sometimes find a treadmill safer, friendlier and more motivational than outside running. The ability to quantify workouts.