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The Advantages of a Curved Non Electric Treadmill Curved treadmills require you to push the belt forward with your own energy, and therefore burn more calories than standard treadmills. They also reduce the strain on joints, making them an ideal option for walkers and runners with knee problems. They're not the best choice for intense workouts. Research shows that curved treadmills can encourage a narrower foot strike, which could result in injuries to the calves and hamstrings. Eco-friendly If you