Lots of home treadmills consist of adjustable incline settings

https://buy-treadmilljmru342.brightsora.com/posts/10-startups-that-ll-change-the-tread-mill-industry-for-the-better

Many home treadmills consist of adjustable incline settings, allowing you to simulate outdoor terrain for stronger legs and much better exercise variety, whether you're training for hills or burning more calories.