Numerous home treadmills include adjustable slope settings

https://treadmills-for-homeddps259.bearsfanteamshop.com/is-treadmills-for-sale-uk-the-same-as-everyone-says

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