What is a "Basal Metabolic Rate" ???

Question

My BMR is 2550 for my height and weight, I am on a low-cal/low-carb/low-fat diet to shape up for bootcamp. I am on 1200 calories a day, how does my BMR figure in to this diet????

Answer 1

Basal metabolic rate (BMR) is the amount of energy expended while at rest in a neutrally temperate environment, in the post-absorptive state (meaning that the digestive system is inactive, which requires about twelve hours of fasting in humans). The release of energy in this state is sufficient only for the functioning of the vital organs, such as the brain, skin, heart, muscles, liver, sex organs, lungs, nervous system, and kidneys. BMR decreases with age and with the loss of lean body mass. Increased cardiovascular exercise and muscle mass can increase BMR. Illness, previously consumed food and beverages, environmental temperature, and stress levels can affect ones overall energy expenditure, and can affect one's BMR as revealed by gas analysis. An accurate BMR measurement requires that the person's sympathetic nervous system is not stimulated. Basal metabolic rate is measured under very restrictive circumstances. A more common and closely related measurement, used under less strict conditions, is resting metabolic rate (RMR)[1].

BMR and RMR are measured by gas analysis through either direct or indirect calorimetry, though a rough estimation can be acquired through an equation using age, sex, height, and weight. Studies of energy metabolism using both methods provide convincing evidence for the validity of the respiratory quotient (R.Q.), which measures the inherent composition and utilization of carbohydrates, fats and proteins as they are converted to energy substrate units that can be converted by the body to energy.

Answer 2

That is a very high BMR. Are you very tall and heavy? Also, 1200cal /day is a severe restriction. If you are doing any activity al all, your actual calorie using will be much higher than the BMR. I would guess if you are reasonable active, you are usage maybe 3200 cal per day. That is the number that will dermine your weight loss. At a negative 2000 calories a day you will lose more than a pound every two days. This is very fast, and probably not sustainable. One problem, as you lose weight your BMR will go down and you total calorie usage will also go down, so your rate of weight loss will drop.

Answer 3

Your BMR is the amount of calories your body burns on its own without activity. You are not supposed to eat less than 500 calories less than your BMR everyday, as you will be starving yourself. In fact, you are technically anorexic because the minimum calories a day for men is 1300. I would say that your diet is unhealthy.

Answer 4

Your bmr is theamount of calories u burn when u do absolutely nothing.If you start a 1200 calorie diet,you'll burn 1350+ calories a day and lose 2.7lbs or more per week.