HUMAN NUTRITION

Detailed explanation-1: -Energy conservation theory posits that the main function of sleep is to reduce a person’s energy demand during part of the day and night when it is least efficient to hunt for food. This theory is supported by the fact that the body has decreased metabolism by up to 10% during sleep.

Detailed explanation-2: -Research has shown that energy metabolism is significantly reduced during sleep (by as much as 10 percent in humans and even more in other species). For example, both body temperature and caloric demand decrease during sleep, as compared to wakefulness.

Detailed explanation-3: -Sleep allows the brain and body to slow down and engage in processes of recovery, promoting better physical and mental performance the next day and over the long-term. What happens when you don’t sleep is that these fundamental processes are short-circuited, affecting thinking, concentration, energy levels, and mood.