Finding the right workout for you can be tough as there are so many to choose from. Several of them tone specific parts of the body, and are useful in their own right. However, some regimens are a bit tougher than others as they put your entire body through a lot of physical strain.

The Treadwall for instance, is not going to be for the faint of heart. It’s like climbing those rock walls you’d find in a mall or at a theme park, but never getting anywhere. You’ll always be one or two feet from the ground, and can set the angle at which you climb with a wheel on the side. This is going to be great for people who have always wanted to climb, but have been too afraid of heights to try. This is probably best suited for adults, as kids seem to have a knack for finding ways to injure themselves. If you’re wanting to plant one of these in your home, you’ll be looking at dropping about $9,950.