Many home treadmills include adjustable incline settings

https://treadmill-ukrpjh610.evergrovio.com/posts/how-buy-treadmills-online-has-changed-my-life-the-better

Lots of home treadmills include adjustable incline settings, permitting you to replicate outdoor surface for more powerful legs and much better exercise variety, whether you're training for hills or burning more calories.