When working the muscles of the body, a warm-up period should begin, so that the muscles are activated, then stretching should be performed so that the muscles relax and flex so that weight lifting can be done properly, since This will help us to have a better performance and, in turn, prevent musculoskeletal injuries due to body cooling, and finally stretch again so that the muscles can recover more quickly from their effort.
The energy needed to raise the temperature of 1 kilogram of water through 1 °C, equal to one thousand small calories and often used to measure the energy value of foods
