https://mouritsen-walther-2.fe....deratedjournals.com/
The Advantages of a Curved Non Electric Treadmill Curved treadmills require you to push the belt forward using your own energy which means they burn more calories than conventional treadmills. They also reduce the strain on joints, so they're an ideal choice for runners and walkers with knee problems. But, they're not suited for intense sprinting workouts. Studies have shown that curved treadmills can encourage an elongated foot strike which could result in injuries to the calves