The Body Mass Index (BMI) is an index used to estimate ones body fat.
BMI indicates your potential health risks by comparing your height and weight. Males with a BMI greater than 27.8 and women with a BMI greater than 27.3 are considered overweight. Males with a BMI less than 20.7 and women less than 19.1 are classified as underweight.
There are limitations to BMI, so it is important to realize that it is only an estimation of body fat. People have valid reasons for maintaining weight outside the normal BMI ranges. Pregnant or breast feeding women, competitive athletes, body builders and people who are chronically ill may experience inaccurate BMI values. People with a high percentage of muscle mass may appear overweight using BMI because muscle weighs more than fat.
How many calories does your body use when you do absolutely nothing for a whole day?
Your Resting Metabolic Rate (RMR) is the minimum number of calories your body needs to support its basic physiologic functions including breathing, circulating blood, digestion and all of the numerous biochemical reactions required to keep you alive. Your RMR is generally 60-75% of your total daily caloric expenditure.
Knowing the minimum number of calories your body needs is important if you're trying to lose, gain or maintain your current weight. Once you know your RMR, use the Daily Caloric Needs calculator which will take into account your activity level.
Knowing your Daily Calorie Needs is more than just knowing how many calories your body needs for its basic physiologic functions (known as your Resting Metabolic Rate).
It is also important to know how many calories your body need to support your daily activity level. By combining your resting metabolic rate and your activity level, you will get the total number of calories your body needs each day.
Very light: sitting, studying, talking, minimal walking
Light: typing, teaching, some walking
Moderate: walking, jogging, gardening
Heavy: digging, climbing
Exceptionally Heavy: weight training, aerobic dance
Sports: vigorous sports competition (> 3 days/wk)
All-out Training high intensity weight and cardio training
Extended Maximal Effort: extremely high intensity and long duration
We all know that exercise and recreational activities burn calories, but just how many?
In addition to your Resting Metabolic Rate and your Daily Caloric Needs, the specific exercises and activities you participate in throughout the day also add to the number of calories your body uses.
Use the Calorie Burn Calculator to find out how many calories you burn by activity and duration.