BODY COMPOSITION

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BODY COMPOSITION The assessment of body composition in the health and fitness industry, as well as in the clinical setting, can provide useful information in assessing risk of metabolic and cardiovascular disease and providing healthy target weights. There are many ways to assess body composition. These ways are summarized on the K536 Overweight and Obesity website. For the most part, the Bod Pod, anthropometry, Near-Infared Interactance, and bioimpediance are the most common techniques used in the health & fitness industry. None are accurate; especially with poor training and poor control of factors. In the clinical setting recommendations can be found at: In the research setting, Bod Pod, Computed Tomography, Magnetic Resonance Imaging, and Dual X Ray Absorptiometry are most often used.

In exercise prescription and programming, assessment of body fat distribution and total body fat can be utilized to make recommendations for health. If your client/patient exhibits an upper body distribution of body fat, weight loss is more critical. Target weights in exercise prescription and programming are based on health or risk of disease rather than athletic performance.

Calculating Target Body Weights Because >33% for women and >25% for men are considered at risk, targeting weight to be under these values should reduce risk. BODY FAT CLASSIFICATION WOMEN MEN Minimal Weight Below Average Above Average At Risk < 8% or < 14% 8-14% to 23% 23 to 33% > 33% < 5% 5 to 15% 15 to 25% > 25% Good policies in recommending target weights: Give all target weights in ranges of 5%. Give short term (6 months) weight loss goals as 3-5% below current weights Give long term weight loss goals 25-30% for women 18-23% for men The steps to determine target weights: Determine fat weight (FW) from total body weight (TW) and percent fat (%F). Determine lean weight (LW) from total body weight and fat weight. Choose the target percent fat. Convert the target percent fat to target percent lean Calculate target weights (TarWt) from target lean (TarLe) and lean weight. Round up your target weights to the nearest whole number FW = TW x %F LW = TW-FW Women 25-30% or men 18-23% Women 70-75% lean or men 77-82% lean TarWt = LW/(TarLe x 100) Re-evaluate body composition every six months for individuals who want to lose weight.

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