If you suffer from fibromyalgia, spiral, triplanar or sound vibration machines will be best for you. Triplanar machines are the updated version of linear machines--they are very effective at building muscle, but without the rough movements on the body. This platform does go up and down, but it also goes front to back, so it's a much more fluid motion. Spiral machines have two totally different motions--Triplanar (up-down/front-back) and Pivotal (see-saw) that can be used independently or together. When used together, these two motors make a figure 8 motion. This is an extremely gentle motion on the gel areas of the spine and joints, with many benefits such as lymphatic drainage, improved circulation, improved bone density, pain reduction, detoxification and muscle building on the higher hertz ranges. Sound vibration machines use high powered speakers to create very smooth, soothing vibrations. These motions relax you, detox you and can also build muscle on higher settings and are the most gentle on the body. These machines will help with pain and fatigue by increasing circulation and oxygenation and release of HGH, to aid in the regeneration of tissue as well as reducing joint pain. The machine will also contribute to the release of endorphins to help alleviate depression.