Consider timber. A carpeted floor with extra padding is far superior for exercising when compared with cement or tile terrain. A hard surface should be that: difficult on your knees and lower back. You will also regret lifting weights on a tile floor after you drop that first weight. If you are tied to the basement for your regular workout space, devote to a few thick exercise mats. Placing a rubberized mat underneath your treadmill as well as other cardio equipment will protect the floor from sweat and oil