Lots of home treadmills include adjustable incline settings

https://www.hometreadmills.ukshyo781.birchreport.com/posts/why-we-love-gym-treadmill-and-you-should-too

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