Data on BMI, standard weight, and obesity determination

A new standard for determining obesity – BMI. To determine if someone is truly obese, it's essential to know their body fat percentage. Accurately measuring body fat requires large machinery or equipment, and the process is quite cumbersome. Therefore, previously, only height and weight were measured, without estimating body fat percentage. However, after considerable effort, several calculation formulas have been developed, such as BMI, which is widely used internationally and can be calculated using a computer. The method utilizes familiar measurements of height and weight, specifically weight (in kilograms) divided by the square of height (in meters). Research indicates that the calculated value is most closely related to body fat percentage.

For example, a man who is 175 cm tall and weighs 70 kg has a BMI of 70 ÷ 1.75 ÷ 1.75 = 22.86. This is the calculated result. The Japanese Obesity Society believes that the optimal BMI for maintaining health is 22 for both men and women. At this level, even eating too little will not cause various adult-onset diseases (lifestyle-related diseases), nor will it cause illness due to nutritional deficiencies.

Standard weight calculation: Height (meters) squared × 22. The value calculated using this formula is your standard weight. If your actual weight is within plus or minus 10%, it is considered normal. If it exceeds 10% to 20%, you are slightly overweight. If it exceeds 20%, you are considered obese.

Normal range for body fat: In a normal person, the weight ratio is approximately 75% to 85% for "active tissue" and 15% to 25% for "body fat". If a man's body fat percentage exceeds 20% to 25% and a woman's body fat percentage exceeds 30%, he is considered obese.

Distinguishing between subcutaneous fat and visceral fat: If you can pinch your abdomen while lying on your back, it indicates a higher proportion of subcutaneous fat. If your abdomen protrudes but cannot be pinched, it indicates a higher proportion of visceral fat. An apple-shaped abdomen (protruding belly) is often associated with a "beer belly," a common trait among middle-aged men. A pear-shaped abdomen (lower body obesity) indicates a higher proportion of subcutaneous fat.

Daily calorie requirement (for people with low-intensity lifestyle):

For men: 20-29 years old: basal metabolic rate 1509 kcal/day, daily calorie requirement 2250 kcal/day; 30-39 years old: 1486/2200; 40-49 years old: 1434/2150; 50-59 years old: 1363/2050; 60-64 years old: 1294/1900; 65-69 years old: 1244/1800; 70-74 years old: 1193/1700; 75-79 years old: 1142/1600; 80 years and older: 1068/1500.

For women: 20-29 years old: basal metabolic rate 1185 kcal/day, daily calorie requirement 1800 kcal/day; 30-39 years old: 1166/1750; 40-49 years old: 1148/1700; 50-59 years old: 1103/1650; 60-64 years old: 1054/1550; 65-69 years old: 1024/1500; 70-74 years old: 991/1400; 75-79 years old: 960/1350; 80 years and older: 904/1250.

Basal metabolic rate baseline values ​​(kcal/kg/day): Men: 20-29 years old 23.3, 30-39 years old 22.3, 40-49 years old 21.7, 50-59 years old 21.4, 60-64 years old 21.2, 65-69 years old 21.0, 70-74 years old 20.8, 75-79 years old 20.7, 80 years and above 20.2. Women: 20-29 years old 23.1, 30-39 years old 21.6, 40-49 years old 20.7, 50-59 years old 20.4, 60-64 years old 20.6, 65-69 years old 20.7, 70-74 years old 20.8, 75-79 years old 20.9, 80 years and above 20.7.