Many home treadmills consist of adjustable slope settings

https://tread-milltnhc399.summitviewdaily.com/posts/the-leading-reasons-why-people-perform-well-at-the-uk-treadmills-industry

Lots of home treadmills include adjustable incline settings, enabling you to simulate outside terrain for more powerful legs and much better exercise variety, whether you're training for hills or burning more calories.