Many home treadmills consist of adjustable incline settings

https://home-treadmillwomr414.juniperbrief.com/posts/a-look-at-the-good-and-bad-about-treadmills-for-sale-uk

Lots of home treadmills include adjustable slope settings, enabling you to replicate outdoor terrain for more powerful legs and better workout variety, whether you're training for hills or burning more calories.