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The Harris–Benedict equation (also called the Harris-Benedict principle) is a method used to estimate an individual's basal metabolic rate (BMR).. The estimated BMR value may be multiplied by a number that corresponds to the individual's activity level; the resulting number is the approximate daily kilocalorie intake to maintain current body weight.
In the early 1970s, computer technology enabled on-site data processing, some real-time analysis, and even graphical displays of metabolic variables, such as O 2, CO 2, and air-flow, thereby encouraging academic institutions to test accuracy and precision in new ways.
Resting metabolic rate generally composes 60 to 75 percent of TDEE. [1] Because adipose tissue does not use much energy to maintain, fat free mass is a better predictor of metabolic rate. A taller person will typically have less fat mass than a shorter person at the same weight and therefore burn more energy.
The metabolic equivalent of task (MET) is the objective measure of the ratio of the rate at which a person expends energy, relative to the mass of that person, while performing some specific physical activity compared to a reference, currently set by convention at an absolute 3.5 mL of oxygen per kg per minute, which is the energy expended when sitting quietly by a reference individual, chosen ...
1.7: 1.6: Intense exercise lasting 20–45 minutes at least three time per week, or a job with a lot of walking, or a moderate intensity job. Very active 2.1 1.9 Intense exercise lasting at least an hour per day, or a heavy physical job, such as a mail carrier or an athlete in training. Extremely active 2.4 2.2
In 2018, the American Heart Association recommended daily intake of sugar for men is 9 teaspoons or 36 grams (1.3 oz) per day, and for women, six teaspoons or 25 grams (0.88 oz) per day. [5] Overconsumption of sugars in foods and beverages may increase the risk of several diseases. [5]
By increasing the proportion of fats in the diet, the respiratory quotient is driven down, causing a relative decrease in the amount of CO 2 produced. This reduces the respiratory burden to eliminate CO 2, thereby reducing the amount of energy spent on respirations. [9] Respiratory Quotient can be used as an indicator of over or underfeeding.
Basal metabolic rate (BMR) is the rate of energy expenditure per unit time by endothermic animals at rest. [1] It is reported in energy units per unit time ranging from watt (joule/second) to ml O 2 /min or joule per hour per kg body mass J/(h·kg).