Losing weight means reducing fat, not water.
When the human body is seriously dehydrated, a large number of metal ions are lost, and the water and salt balance of the human body is out of balance, which will affect the normal physiological functions of various organs of the human body.
Exercise in hot weather will increase the amount of heat produced by the body. Because the plastic wrap is wrapped around the body, it can't effectively dissipate heat in time, which will lead to heatstroke shock.