Lots of home treadmills consist of adjustable slope settings

https://hometreadmillslhpu932.juniperbrief.com/posts/20-trailblazers-setting-the-standard-in-walking-machine

Lots of home treadmills consist of adjustable incline settings, allowing you to mimic outdoor surface for more powerful legs and much better workout variety, whether you're training for hills or burning more calories.