The more muscle mass in the physical composition of an individual, the higher the BMR required to sustain their body at a certain level.Īge – The more elderly and limber an individual, the lower their BMR, or the lower the minimum caloric intake required to sustain the functioning of their organs at a certain level. However, anaerobic exercises, such as weight-lifting, indirectly lead to a higher BMR because they build muscle mass, increasing resting energy consumption. Muscle Mass – Aerobic exercises, such as running or cycling, have no effect on BMR. The three equations used by the calculator are listed below: You can pick the equation to be used in the calculation by expanding the settings. Of these equations, the Mifflin-St Jeor Equation is considered the most accurate equation for calculating BMR with the exception that the Katch-McArdle Formula can be more accurate for people who are leaner and know their body fat percentage. The Katch-McArdle Formula is slightly different in that it calculates resting daily energy expenditure (RDEE), which takes lean body mass into account, something that neither the Mifflin-St Jeor nor the Harris-Benedict Equation does. The Mifflin-St Jeor Equation has been shown to be more accurate than the revised Harris-Benedict Equation. It was revised in 1984 to be more accurate and was used up until 1990, when the Mifflin-St Jeor Equation was introduced. The Harris-Benedict Equation was one of the earliest equations introduced. In most situations, the BMR is estimated with equations summarized from statistical data. The daily caloric need is the BMR value multiplied by a factor with a value between 1.2 and 1.9, depending on activity level. Basal metabolism is usually the largest component of a person's total caloric needs. An accurate BMR measurement requires that a person's sympathetic nervous system is inactive, which means the person must be completely rested. The BMR is measured under very restrictive circumstances while awake. Physical activity makes up ~20% of expenditure and ~10% is used for the digestion of food, also known as thermogenesis. For most people, upwards of ~70% of total energy (calories) burned each day is due to upkeep. In such a state, energy will be used only to maintain vital organs, which include the heart, brain, kidneys, nervous system, intestines, liver, lungs, sex organs, muscles, and skin. It is the equivalent of figuring out how much gas an idle car consumes while parked. The basal metabolic rate (BMR) is the amount of energy needed while resting in a temperate environment when the digestive system is inactive. More muscle means a higher BMR.Related Body Fat Calculator | Calorie Calculator Muscle (in the LBM) consumes more energy (calories) than fat. BMR: Basal Metabolic Rate - Calories required to maintain basic function.WHR: Waist Hip Ratio (distribution of fat stores in abdomen and hips).BMI: Body Mass Index (based on height and weight).ICW: Intracellular Water (inside of cells).ECW: Extracellular Water (outside of cells).LBM Segmental Assessment: LBM of each extremity and trunk.Below is an outline of the information that you will receive. In my office, we will obtain your body composition analysis regularly and you receive a printed copy at each visit. Another important factor to help with weight loss is having an accurate BMR (basal metabolic rate). Rapid weight loss over a few days is usually water weight and not fat and rapid weight gain over a few days is water and not muscle. The goal over time is to lose fat mass and maintain lean body mass. This information is useful as a baseline before starting a weight loss program and at regular intervals to monitor weight loss. This body composition analysis gives you important information and is essential in following your weight loss journey. The correlation coefficient compared to isotope dilution is R=0.97. Also, an individual can have a BMI in the “normal range” and not be metabolically healthy.Īdvanced full body multi-frequency analysis is the most accurate bio-electrical impedance analysis technology available. Remember, BMI (body mass index) is only one measure of your overall health status and other health and medical information should be taken into consideration. high blood pressure, metabolic syndrome, high cholesterol, pre-diabetes, or diabetes) you may qualify for prescription anti-obesity medications. If your BMI is 27 -29 and you have a weight related medical condition (e.g. If your BMI is 30 or over, you may qualify for prescription anti-obesity medications. Generally, lifestyle modifications (exercise and healthy eating) are recommended to lose excess weight or maintain a healthy weight. Body Composition Analysis - BMI (Body Mass Index)
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