  thumb|100px|right|this is an example of a training corset. it has long, stiff shoulder straps which raise the lower ribs a training corset is generally a corset used in body modification. a training corset may be used for orthopedic reasons (such as to correct a crooked spine) or for cosmetic reasons (to achieve a smaller waistline, commonly called waist training or in more extreme cases tightlacing.) the term "training corset" is also sometimes used for bdsm corsets used for discipline. in addition, the term "training corset" may simply refer to a corset which is used to acclimate the body prior to wearing a full corset as an everyday undergarment, or to any corset worn by somebody undertaking training (achieving a desired body shape). ==redresseur corset== the redresseur corset was a form of training corset used from the mid-19th century into the early 20th century, designed specifically for young adolescent girls who had not worn stays from an early stage. in addition to moulding a pronounced waist, it served as a back harness and was intended to improve posture. ==orthopedic corsets== corsets may be worn for orthopedic reasons, such as correcting a crooked spine or straightening the back and shoulders. ==waist training corsets== waist training, or waist reduction, generally uses an hourglass corset. waist reduction, sometimes called "tightlacing," is often used by women who are post-pregnancy or by women involved in bdsm. no structural features distinguish a modern waist training corset from a corset worn as an external garment for special occasions. training corsets are always made from strong fabric (or leather) and with relatively inflexible boning (not all corsets are strong enough to mold a body). a training corset is designed to be used every day, and will generally be hidden under clothing, so it is likely that the practical aspects (comfort, ease of laundering, etc.) will have been prioritized in its construction over aesthetic ones. any style of corset can be used for waist training, although some styles are more popular and suitable than others. however, as the corsets n
Corsetry