When worn correctly and consistently, a waist trainer can significantly reduce pain and improve posture. A waist trainer can be used for medical purposes and is recommended for individuals who suffer from scoliosis. The waist trainer is designed to improve the curvature in the spine while reducing slouching and poor posture. Corsets are both flexible (which help with agility and mobility) and rigid (which help to maintain the body in an upright position thus promoting improvement with posture).