The Harris Benedict equation is a calorie formula using the variables of height, weight, age, and gender to calculate basal metabolic rate (BMR). This is more accurate than calculating calorie needs based on total body weight alone. The only factor it omits is lean body mass and thus the ratio of muscle-to-fat a body has. Remember, leaner bodies need more calories than less fatter ones. Therefore, this equation will be very accurate in all but the very muscular, then, Harris-Benedict will under-estimate calorie needs, and the very fat , then, Harris-Benedict will over-estimate calorie needs. Harris Benedict Formula for Men: (uses 66 as the male gender constant) BMR = 66 + (13.7 * weight in kilos) + (5 * height in cm) - (6.8 * age in years) Example: Say you're a 25 year old male, who's 6'0, 210 pounds and is moderately active: 1. Convert your height to inches, which would be 72 inches and then to centimeters (72 * 2.54) = 182.88 centimeters. 2. Convert your weight to kilograms. (210 / 2.2) = 95.45 3. Plug in your numbers. 66 + (13.7 * 95.45) + (5 * 182.88) - (6.8 * 25) is 66 + 1,307.67 + 914.4 - 170 = 2118.07 BMR 2118.07 BMR * .5 = 1059.04 activity factor 2118 + 1059.04 = 3177.11 BMR+activity factor 3177.11 BMR+activity factor * .1 = 317.71 thermic food effect 3177.11 + 317.71 = 3494.82 Calories is the BMR+activity factor+thermic food effect
The programs bottom 2x tables take a turn away from the Harris Benedict formula, to use the BMR+Activity+TEF calculation in way of calculating Gaining Mass and Losing Fat. The t-nation.com Nov 2005 article by Christian Thibaudeau, titled "The Carb Cycling Codex" is the latest diet adaption for bodybuilders to hit the news. Its basis is in a Carb Cycling diet, and such types of diet have been around for a while. But here the cycling is used and applied in 6x different ways. 3x ways for Gaining Mass and 3x ways for Losing Fat. The Harris-Benedict calculations only allow a maximum bound of calories per day, this calculation is called a Maintenance Diet. But in this Carb Cycling diet, the calculations can be applied toward a bodybuilders dream of Gaining Mass and/or Losing Fat. By switching diet strategies, this is what makes Carb Cycling work, basically keeping the body guessing, without ever stabilizing the diet and causing either muscle loss or fat gain. Read the Carb Cycling Codex article to get the full instructions about the use of this mighty fine diet. Sources: (with much thanks for making this program possible) http://www.weight-loss-i.com/calorie-needs-harris-benedict.htm http://www.t-nation.com