bioelectrical impedance pros and cons

Similar to hand-held methods, leg-to-leg BIA involves an individual standing on scales with four electrodes situated at each footplate, with a low-level current passed through the lower-body. There are factors that BMI does not reflect, such as muscle mass. Once again, there have to be variables, and there have to be constants. It is important that these equations are validated using a total-body, water-based, four-compartment method, in an attempt to minimise the measurement error that is found when equations are based on the two-compartment model; such as hydrostatic weighing. Verywell Fit's content is for informational and educational purposes only. 74-78, 2005. 2015 Jan;69(1):3-13. doi: 10.1038/ejcn.2014.203. Expert Wellness Picks and Advice to Your Inbox, Comparison of Foot-to-Foot and Hand-to-Foot Bioelectrical Impedance Methods in a Population with a Wide Range of Body Mass Indices, Comparisons of accuracy of estimating percent body fat by four bioelectrical impedance devices with different frequency and induction system of electrical current, Bioelectrical impedance analysis (BIA): A proposal for standardization of the classical method in adults, Impact of eating and drinking on body composition measurements by bioelectrical impedance, Validity of body-composition methods across racial and ethnic populations. Malia Frey is a weight loss expert, certified health coach, weight management specialist, personal trainer, and fitness nutrition specialist. Body fat scales use bioelectrical impedance analysis (BIA) to estimate the relative percentages of different tissues and substances within the body. Handheld BIA devices use electrical impulses to estimate BFP. 4, pp. It also measures the volume of water that a persons body displaces when they sit inside a tank of water. You can learn more about how we ensure our content is accurate and current by reading our. The validity (the agreement between the true value and a measurement value) of body composition is key to determine the precision of BIA measurement, and its suitability for clinical use. As with the Bod Pod, HUW is typically only available in research laboratories and university settings. Together, body fat scales and BMI can give a general indication of a persons health. Body Mass Index (BMI) measures how healthy your weight is, based on your height. Bioelectrical impedance analysis; Body composition; Elderly; Prediction equations. Saunders et al., [18] showed that BIA was not a suitable method of body composition assessment in athletes with abnormal hydration status (e.g. In bioelectrical impedance assessment a small alternating current (20 to 100 A, frequency ranging from 5 kHz to 200 kHz) is applied to the body and conducted by water and dissolved electrolytes in the body. Fat loss diet daily burn, natural body fat burning foods celery, best 54-59, 2013. . Results may vary depending on the device used: the accuracy of BI results may vary depending on the specific device used and the quality of the device, Can be affected by recent exercise: The results may be affected by recent exercise as the muscle will have more hydration and will conduct electricity better, thus appearing to have less body fat. Validity of bioelectrical impedance analysis in estimation of fat-free mass in colorectal cancer patients. muscle, fat, bone, etc.) BIA assumes that the human body is composed of a series of cylinders, uniform in shape, length, cross-sectional area, and with constant conductivity. Bioelectrical impedance analysis devices are considered safe for most people. For instance, a 2016 study found an association between increased abdominal fat and a higher risk of developing cardiovascular disease. We rely on the most current and reputable sources, which are cited in the text and listed at the bottom of each article. Can be used on a variety of populations: BI can be used on a variety of populations, including children, older adults, and individuals with disabilities. 2010;8(5):437-441. doi:10.1089/met.2010.0013. Hand-held BIA machines assess the conductance of a small alternating current through the upper-body and use built-in software to calculate body composition after it has been calibrated with the following variables: weight, height, age, and gender [6]. The smaller the electrode of a BIA device, the larger the impedance measurement error due to the contact resistance between the electrode and human skin. The reliability of BIA measurements is influenced by various factors related to the instrument itself, including electrodes, operator, subject, and environment. Some experts say that segmental fat analysis (using hand-foot BIA) is more accurate because hand-hand devices primarily measure the upper body, while foot-foot scales primarily measure the lower body. 417-424, 1986. 2023 Mar 13;12(6):1218. doi: 10.3390/foods12061218. 405-411, 2007. Content is fact checked after it has been edited and before publication. Body fat scales use bioelectrical impedance analysis (BIA) to estimate the relative percentages of different tissues and substances within the body. A Bod Pod requires specially trained operators, who tend only to use it in research laboratories. Even though many factors can affect your reading accuracy, a regular BIA scale can show youchanges in your body fat over time. quantities of fat mass and fat-free mass) by running a small electrical current through the body. If either value is high, a person should see their doctor for a health check. Since your muscles contain mostly water, they have less resistance to this electrical current. 434-440, 1990. P. Clarys, A. D. Martin and D. T. Drinkwater, Gross tissue masses in adult humans- data from 25 dissections, Human Biology, vol. This site needs JavaScript to work properly. 45, p. 865, 1987. Keywords: body composition, fat mass, fat free mass, bioelectrical impedance analysis. However, they are not very accurate. The price of your BIA scale will depend on how sophisticated the product is. The above values make it possible to determine the persons body composition, including their BFP, based on the principle that fat is less dense than muscle. I'll comment on the skinfold caliper method next time. The doctor can also provide advice on diet and exercise. Bioelectrical impedance analysis (BIA) measures body composition based on the rate at which an electrical current travels through the body. This value represents the persons body volume. TicWatch Pro 3 comes in at $300 but is often on sale. 1017-1022, 1988. Hand-to-foot BIA devices, however, may allow for greater accuracy, as the current is sent from the upper-body to the lower-body, and is less likely to be influenced by the distribution of body fat. 407. doi:10.1088/1742-6596/407/1/012018. Bioelectrical Impedance Analysis - an overview | ScienceDirect Topics They then compared these results with the data that they retrieved from the home-use BIA body fat scales. BIA sends a weak electrical impulse through the body. What are the pros & cons of Bioelectrical Impedence? Very accurate: As we know a human is to error but with computerized 3d scanning, precise trigonometric measurements can be precisely recorded at ease with minimal errors. However, it does not measure body fat directly. Body Mass Index (BMI): Pros and cons. 85-92, 2007. First we will begin with the pros: Pros It's non-invasive and therefore that means we don't have to cut anyone up or do any injections. Body Mass Index Advantages and Disadvantages | livestrong This makes the application of BIA in this population difficult, as athletes are likely to possess substantially different quantities of fat and fat-free mass when compared to the general population or diseased populations that current equations are based on. According to the Centers for Disease Control and Prevention (CDC), BMI is a good tool for screening whether a person is underweight or overweight. 2015;28(2):165-171. doi:10.1111/jhn.12259, Blue MNM, Tinsley GM, Ryan ED, Smith-Ryan AE.

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