TrueForm reimagined their popular commercial-grade manual treadmill for at-home use, building a sturdy machine with a shock-absorbing belt that will help you pick up the pace and go the distance.

(That holds true for motorized treadmills. Those you power on your own—like the Woodway Curve or the TrueForm Trainer—are more demanding, he says.) But the data do show the rate of perceived ...