Balance disc is an important strength training tool that can be used by adults and children. The simple act of sitting on the disc activates core abdominal and trunk muscles. Flexor and extensor muscles work in tandem to keep your balance on the disc while continuously strengthening and toning. Through these small, continuous motions that you are making, deep core muscles are constantly stimulated and enhanced. It is however, not meant for sitting only. You can actually stand, kneel, and do all sorts of exercises on it, thereby increasing the benefits of those exercise routines.