Meet the Curve Treadmill: a self-powered, manual treadmill that helps you burn more calories. It lets you reach full sprint in a few steps and does not require electricity to work. The Curve software tracks time, speed, distance, heart rate, and other metrics. It generates reports to help you analyze your performance.
More gadgets like this ➡️ : here
The above video shows what Curve has to offer. More information is available here.
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