Body composition analysis relies on BMI calculation, understanding BMR/RMR standards, and identifying the biochemistry behind fat metabolism and lipolysis.
The Centers for Disease Control and Prevention has estimated the average height of American teenagers via physical examinations 5 times since the 1960s. CDC estimates that the average teenage girl in 2002 -- the year of the most recent physical exams -- is about 0.3 inches taller than she was in the 1960s.
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The body mass index, or BMI, tables use the word "normal" to categorize the weight status of people who weigh between the underweight and overweight standards. Your height and weight determine your BMI. The weight-for-height tables use "desirable"
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The average body mass index (BMI) in men between the ages of 20 and 74 has increased from 25.1 in the early 1960s to 27.9 between 1999 and 2002, the last year there was a National Health and Nutrition Examination Survey. Men 75 and over weren’t sampled until 1988, but their BMI has also increased.
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The standard for determining what is a man’s ideal weight has changed in recent years from insurance companies’ Weight-for-Height tables to Body Mass Index (BMI) tables that correlate height and weight with BMI.
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