Check out the full review.

However, I didn't really feel like they changed my form. Because each of these machines rides a little differently, I've included a lot of images of my natural stride on each machine.

I think the size of the running surface is easily the most important spec to consider when looking at a motorized treadmill because it gives you an idea as to how comfortable it’s going to be to use.

In my college days I'd often begin runs by heading across campus, past the University gym. TrueForm has thought through not only the engineering and design of the Runner, they have also added a few extra features that really make it stand out. TrueForm Runner . Motor capacity ranges from 3.5 CHP on the SMART Pro 2000 to 4.0 CHP on the 9000 model. It is quite obviously strong and durable, but also has a decent amount of give, such that even barefoot running feels very gentle on the body and the joints. The included display keeps you informed on your pace, speed, distance, time.

Even if it comes with a $4,000 price tag (which, PSA: You can snag for 10 percent off with the code PUREWOW right now). That's fine if you want to burn the extra calories. Horizon T101 Treadmill They all feel good, but feel different; check the review for all the details. The TrueForm Trainer is a high-end, curved manual treadmill designed to help improve your running form as you use it. I’d rather run a marathon during a polar vortex than spend an hour on a treadmill. Especially considering most high-end motorized treadmills come with at least a 20″ wide belt. Most of their treadmills are the usual, motorized kind. An optional Bluetooth display is available. The TRUEFORM requires no power. The Runner (the treadmill we’re here to discuss), is their highest-end model. Contrast this with the traditional thin continuous belts of an ordinary treadmill. They all feel good, but feel different; check the review for all the details. The TRUEFORM Trainer is an advanced, non-motorized treadmill that’s compact, lightweight, and uniquely simple to use The running surface is 17″ wide – just like it’s big brother – the Trueform Runner.

You don't punch in a pace and work for the machine. One is that they claim you "will burn 44% more calories on a TRUEFORM than on any motorized treadmill" due to the effort of pushing the belt. The rubberized surface of the slat belts is designed to offset some of the impact force from running. You can select a standard rubberized black slat belt that is excellent for all-around training and will support any running shoe. The Assault AirRunner was a bit of a different beast; its belt wants to keep spinning, like a flywheel, so you don't need to do any extra work to keep it going.