Which ProForm Treadmill is the Best?

The ProForm treadmill is the official treadmill for the Boston Marathon, where many of the athletes taking part in the races train. The features that most users like on this treadmill are the folding mechanism, which is easy to use, as well as the possibility to run on deck. It is not quaking, but it is still able to mimic the terrain changes that accompany a real running track. After researching, I found that ProForm PRO-9000 is the best ProForm treadmills in 2020.