If you have low muscle tone, the best vibration machine for you would be a tri-planar, linear or spiral machine. Tri-planar and linear machines are both incredible effective at muscle building. Linear machines are just a straight up and down motion. Tri-planar machines are kind of the update to linear machines. They go up and down, but front to back also. These machines will give you improved muscle tone, but with a gentler, more fluid motion. Spiral machines are all around machines. They have two motors--Tri-planar (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. These machines help tone muscles by building muscle and releasing HGH.