The word "Thighmaster" has become synonymous with a popular exercise device designed to tone and sculpt the thigh muscles. However, there are several other synonyms for this device such as thigh toner, leg magic, leg master, inner thigh toner, and several others. These devices work by creating resistance to the inner and outer thigh muscles as you squeeze or push them together. While Thighmaster is a trademarked brand name, it has become the common name for this type of exercise equipment. Regardless of the name, the goal is to increase strength and flexibility in the thighs and improve overall lower body strength.