Determining LBM/Body Fat percentages is essential, especially during intense training periods, for these highly toned individuals. This means they have a higher daily caloric intake need, but it also makes most standard weight assessments inaccurate. Bodybuilders and most elite athletes have a great muscle mass and tend to be much leaner overall. Calculating your Body Fat allows you to then use your Lean Body Mass (LBM) amount to more accurately establish caloric need. Your body fat in comparison to your muscle mass is what determines your fitness. Your body is composed of organs, muscles, bones, water and fat, all contributing to your total body weight. Women: BMR = 655 + ( 4.35 x weight in pounds ) + ( 4.7 x height in inches ) - ( 4.7 x age in years ) Men: BMR = 66 + ( 6.23 x weight in pounds ) + ( 12.7 x height in inches ) - ( 6.8 x age in years ) Using BMR in conjunction with the Harris Benedict formula can be wildly helpful in creating calorie intake goals while training, bodybuilding and prepping for competition (See Caloric Need Calculator). People actively engaging in anaerobic exercise, such as weight lifting, to increase muscle mass have a higher caloric intake need just to sustain bodily function, increasing BMR. Greater muscle mass increases resting energy consumption. Another factor to keep in mind is muscle mass. This need varies based on factors such as age, diet, supplementation, activity level, genetics, even the weather. Generally, the average person uses approximately 70% of their calories for body function, 20% for physical activity, 10% to digest food. ![]() ![]() Every function of the body uses calories, even while lying in bed with an empty stomach. Your BMR (Basal Metabolic Rate) refers to the necessary amount of calories your body needs to, essentially, sustain life.
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