Lots of home treadmills include adjustable incline settings

https://tread-millslde884.terracolumn.com/posts/are-you-tired-of-buy-treadmill-10-inspirational-ideas-to-invigorate-your-love

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