Muscle and fat respond differently to electrical currents, and the scale uses these differences to determine body fat.Įven though this method is one of the simplest ways to estimate body fat in a home setting, there are some drawbacks to using smart scales.Ī 2021 study compared the accuracy of three smart scales in measuring body weight and composition in underweight, normal weight, and overweight adults against DEXA. The FFI estimates body fat and muscle mass by sending electrical currents to the body and measuring the response. Unlike traditional scales that only measure body weight, body fat scales combine weight scales with something called a foot-to-foot impedance meter (FFI) ( 12). Nevertheless, the CM method is one of the best ways to measure body fat at home because it’s inexpensive and can be done by most anyone.īody fat scales or smart scales are popular amongst those who want an easy way to monitor their body composition regularly at home. This means that the accuracy of the CM method varies depending on body fat distribution. However, the researchers found that the CM method was less accurate when measuring females with larger waists. It’s important to measure correctly, leaving enough tension to provide an accurate measurement while being careful not to indent the skin.Īlso, this method requires some knowledge of anatomy for example, knowing the location of the voicebox.Ī 2019 study that included 76 active military service members found no significant differences when comparing the accuracy of the CM method to DEXA - considered one of the most reliable measures of body fat ( 10). % body fat = 86.010 x log10 (abdomen – neck) – 70.041 x log10 (height) + 36.76Įven though this method may seem simple, it does require taking measurements accurately and precisely. These averages are then plugged into an equation along with a person’s height ( 11). The three measurements for each site are read parallel to the floor and averaged together.
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