The body naturally experiences an increased metabolic rate the body naturally experiences an increased metabolic rate when we adopt a reduced-calorie diet. during pregnancy. as we age. during sleep.

The answer to this question would be: during pregnancy

Body metabolic rate will be increased during pregnancy because the mother needs to supply the child needs too. In reduced-calorie diet, the body will adapt to the hunger by lowering the basal metabolic rate. The basal metabolic rate also will be decreased as we age and when we are sleeping.