This very much depends on whether you want a multifunctional stretching machine that allows a full-body stretch or one that targets specific parts of the body, such as calves, shoulders, neck, or back, etc.If you want to stretch several different parts of the body, you should opt for a stretching machine for the whole body.If you know the specific body part you want to stretch, you may want a machine that focuses on that specific area, such as an inversion table for the back, or a machine that focuses solely on your calves and hamstrings.If you are unsure of what to go for, the safest option is to select a stretching machine for the whole body.