Many home treadmills consist of adjustable incline settings

https://treadmillemjd104.valoradigest.com/posts/the-biggest-problem-with-home-treadmill-and-how-you-can-solve-it

Numerous home treadmills include adjustable incline settings, enabling you to simulate outdoor terrain for stronger legs and better exercise range, whether you're training for hills or burning more calories.