The energy metabolism rate of the human body when awake and extremely quiet is not affected by mental stress, muscle activity, food, environmental temperature and other factors. To measure basal metabolic rate, lie still for half an hour before breakfast in the morning (but keep awake), keep the room temperature at about 20℃, and measure it by indirect calorimetry.
The unit of basal metabolic rate is kj/m 2/h (kilojoules/square meter/hour), that is, the number of kilojoules of heat released per square meter of body surface per hour.
Extended data:
The basal metabolic rate is not greater than or less than 15% of the normal value, which is normal. The determination of basal metabolic rate is the main auxiliary means for clinical diagnosis of thyroid diseases. The basal metabolic rate can be significantly increased in hyperthyroidism and decreased in hypothyroidism.
In clinical and physiological experiments, it is stipulated that the subjects have not eaten for at least 12 hours, and the metabolic rate is measured at room temperature of 20℃, resting for half an hour, staying awake and not doing mental and physical activities.
Calculation formula:
(1) basal metabolic rate% = (pulse rate+pulse pressure)-11(gale)
(2) basal metabolic rate %=0.75× (pulse rate+pulse pressure difference ×0.74)-72 (reading)
(3) basal metabolic rate %= 1.28× (pulse rate+pulse pressure difference)-1 16(Kosa)
Ambient temperature has obvious influence on basal metabolism, and the metabolism is the lowest in comfortable environment (20 ~ 25℃). In both low and high temperature environments, metabolism will accelerate. Low ambient temperature may cause shivering in different degrees, which will affect the increase of metabolism. When the ambient temperature is high, you need to sweat because of heat dissipation, and your breathing and heartbeat are accelerated. So it affects metabolism.
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