The 1-inch Comfort Green base height of this premium BodyFulcrum™ is preferred for people with stiffness in their back; want a COMFORTABLE device to work their back, abs, core, hips, upper back, shoulders, neck, and low back. Beginners to bodywork. Also, great for injury rehabbing athletes, golfers, new moms, dancers, tradesmen, laborers, plumbers, carpenters, electricians, police officers, firefighters, and military personnel who need their backs to be powerful with all-day endurance. Great for seniors. Our YouTube channel, BodyFulcrum, has a video of a 97-year-old woman using the BodyFulcrum.