Match the treadmill to how you will use it. Walkers can use a shorter, narrower deck and a smaller motor; runners need a longer deck (commonly 60 inches) and a stronger continuous-duty motor. Check top speed, incline range, the user weight limit and the folded and unfolded footprint, and leave clearance behind the belt. Compare the subscription cost if the screen needs one.
A treadmill is a big purchase that has to fit your space and your stride. These are the specs that matter.
Walking vs running
| Spec | Walking | Running |
|---|---|---|
| Deck length | 50 to 55 in can work | About 60 in |
| Deck width | 20 in or more | 20 to 22 in |
| Motor | Lower continuous rating | Higher continuous rating |
| Top speed | 4 mph or more | 10 to 12 mph |
Motor and belt
Compare continuous horsepower (CHP), not peak. A stronger motor runs cooler at running speeds and with heavier users. A cushioned deck and a thicker belt make longer sessions more comfortable.
Incline and decline
Incline makes walking much harder without running. Some treadmills also decline, which helps train for hills.
Space and folding
Check the unfolded and folded dimensions, the ceiling height (deck height plus your height and some bounce), and the safety clearance the manual asks for behind the treadmill. Folding decks save floor space but need lifting and locking.
Screens and subscriptions
Many treadmills use a training app. Price the subscription into the total cost, and check what works without it.
Related
Common questions
What size treadmill deck do I need for running?
Runners usually want a deck around 20 to 22 inches wide and 60 inches long. Taller runners and faster paces benefit from the longer deck.
What does CHP mean on a treadmill?
Continuous horsepower: the power a motor can sustain over time. It is more useful than peak horsepower when comparing treadmills.
Are walking pads good for running?
Check the maker's top speed and intended use for the exact model. Compare the walking surface and running specifications in our [walking pad vs treadmill guide](/guides/walking-pad-vs-treadmill).