In this article, you may find all methods for check lean mass and fat tissue. It is important to differentiate between overweight and overfat. Overweight is defined as an upward deviation in body weight, based on the subject’s height. Most normative data defines overweight as 20% or more above ideal weight. Since only height and weight are factored into the equation, excess body weight could be attributed to either fat mass or lean tissue. Overfat, a more accurate depiction of body composition, indicates an excess amount of body fat.
Assessment of body composition is often of great interest to a person. In fact, many men’s/women’s are compelled to enroll in a personal training program for the sole purpose of changing their body composition. The assessments presented in Table are used to assess body composition. Due to the cost and limited availability 0 the equipment needed, not all are practical in a fitness setting.
The assessment of body composition can be quite invasive. It is important for personal trainers to conduct these assessments in a private area to put the client at ease. Clients should be instructed on appropriate attire to promote easy access to measurement sites. The trainer should act as a professional and be competent in the chosen method. Testing accuracy is improved by proper hydration, so it is important to instruct the man not to exercise prior to testing and to maintain adequate hydration throughout the day
During subsequent reassessments, body composition will likely change due to a loss of body fat and an increase in lean tissue Between measurements, a person may notice changes in the way his or her clothes fit. These subjective observations will be motivating to the men/women. objective reassessments of body composition will be especially important for a person who has not noticed any significant change on the bathroom scale. a person may need to be reminded that as lean mass increases and body fat decreases. the scale cannot differentiate between the two.
If a person is extremely obese. some of the body-composition techniques will not be accurate (see Table). in some cases, lt may be more appropriate to utilize only BMI and girth measurements.
Body-Composition Assessments (Methods for check lean mass and fat tissue)
Bioelectrical impedance analysis(BIA) whole-body BIA machine is found primarily in a laboratory setting
Less-sophisticated BIA devices are found in a fitness setting
BIA measures electrical signals as they pass through fat, lean mass, and water in the body. In essence, this method assesses leanness, but the calculation can be made based on this information. BIA accuracy is based primarily on the sophistication of the machine and the validity of the prediction algorithms. Many fitness centers utilize BIA due to the simplicity of use. optimal hydration is necessary for accurate results.
Air displacement plethysmography(ADP) Example: Bod Pod (or pea pod for children)
Marketed for the fitness setting, but it is cost-prohibitive for most facilities.
The Bod Pod is an egg-shaped chamber that measures the amount of air that is displaced when a person sits in the machine. Two values are needed to determine body-fat: air displacement and body weight. ADP has a high accuracy rate but the equipment is expensive.
Dual-energy x-rayabsorptiometry (DXA) Typically found in a clinical setting: may be found in exercise physiology departments at colleges and universities.
DXA ranks among the most accurate and precise methods. DXA is a whole-body scanning system that delivers a low-dose x-ray that reads bone and soft-tissue mass. DXA has the ability to identify regional body-fat distribution.
May be found in exercise physiology departments at colleges and universities
The method measures the amount of water a person displaces when completely submerged, thereby indirectly measuring body fat via body density. it is generally not practical in a fitness center setting due to the size of the apparatus and the complexity of the technique required for accurate measurements, which involves the individual going down to the bottom of the tank, exhaling all air from the lungs (expiratory reserve volume), and then holding the breath until the scale settles and records an accurate weight. the assessment must then repeated to ensure reliability.
Magnetic resonance imaging(MRI) Found in hospital and diagnostic centers
MRI uses magnetic fields to asses how much fat a person has and where it deposited. Since MRIs are located in a clinical setting, using an MRI solely for calculating body fat is not practical.
Near-infrared interactants (NIR) Example:futrex
NIR uses a fiber optic probe connected to a digital analyzer that indirectly measures tissue composition (fat and water). Typically, the bicep is the assessment site. The calculation is then plugged into an equation that includes height, weight, frame size, and level of activity. this method is relatively inexpensive and fast, but generally not as accurate as other techniques.