A study by Kyungpook National University in South Korea did a preliminary study to determine if wearing body-shapers did more than just make women look slimmer. The researchers found that wearing a one-piece bathing suit-like shapers for four days (during waking hours only) was enough to interfere with the women’s daily “circadian” rhythms.
In the evenings, after wearing the compression garments all day, the womens’ levels of melatonin were lower and their body temperatures were higher than on days when no body shaper was worn at all. The researchers say that this may compromise sleep quality because a rise in melatonin and a fall in body temperature are needed to induce sleep.
While this was a small study of only five women, I have a feeling more research will be done as the body shaper industry continues to explode in popularity.