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Is a Manual Treadmill Better Than Electric? Manual treadmills are powered by your own energy and do not use motors. This kind of treadmill is typically a better option for runners as it aids you power through your strides. You can consider a flat belt or a curved manual treadmill if you wish to increase your heart rate even at lower speeds. Here are a few reasons why. 1. It's more challenging A manual treadmill is a great alternative if you're looking to test yourself and add a bi