How to build a medical and research grade treadmill by ourselves which does not cost as much as a used Mercedes Benz B 180 (parts, software, etc)?

The Woodway curve is one of the view treadmills from which we can find that scientific papers have been written which uses this device: https://scholar.google.com/scholar?hl=de&as_sdt=0%2C5&q=woodway+curve&oq=woodway How are data obtained from this device to write papers with it? Woodway offers software for this treadmill: The software is running on a PC is connected over usb to …