Everything You Need to Know About Calorie Counting
Calories are the units of energy your body uses to function. Whether you want to lose weight, gain muscle, or maintain your current physique, understanding your caloric needs is the first step toward success.
Choosing the Right BMR Formula
Not all metabolic formulas are created equal. Depending on your body composition, one might be more accurate than the others:
- Mifflin-St Jeor: Consider the most accurate for the average person in the modern era. Used by most medical professionals.
- Harris-Benedict: An older, classic formula. Often slightly overestimates needs for very active individuals but remains a reliable benchmark.
- Katch-McArdle: Most accurate for athletes and bodybuilders because it calculates BMR based on Lean Body Mass rather than total weight.
BMR vs TDEE
- BMR (Basal Metabolic Rate): The energy your body needs for basic functions like breathing and heart rate while at complete rest.
- TDEE (Total Daily Energy Expenditure): The total amount of calories you burn per day based on your BMR combined with your physical activity level.
International Standards (kJ vs kcal)
While Americans and Europeans mostly use "Calories" (kilocalories), many countries like Australia and New Zealand use "Kilojoules" as their official unit of energy measurement. 1 calorie is approximately equal to 4.184 kilojoules.