Many home treadmills include adjustable slope settings

https://treadmill-uklgdo497.oakmontscope.com/posts/7-simple-changes-that-ll-make-a-big-difference-in-your-running-machine-for-home

Lots of home treadmills consist of adjustable slope settings, allowing you to imitate outside terrain for more powerful legs and much better workout variety, whether you're training for hills or burning more calories.