Along with reading BMI, fat percentage, and other body composition items, the DEXA test which stands for dual-energy X-ray absorptiometry utilizes X-ray technology to determine changes in body density of up to a tiny 1 percent. DEXA provides a strong look at bone mineral density, allowing doctors stronger disease control over bone-related risks such as osteoporosis and osteopenia. Now that we know all the varying ways to calculate body composition, what can we do with this information?
Most will likely put these details to work for their weight loss programs, acting as their trainer and devising a custom health care plan that works for their individual needs. There's plenty of science to show how these products could improve weight loss.
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You must be over 18, a resident of the U. Late fees apply. Estimated payment amounts shown on product pages exclude taxes and shipping charges, which are added at checkout. Click here for complete terms. Close Cart. Free Shipping. Written By Quinton Hamp. And that's great! But how exactly does a smart scale or handheld BMI machine work? Body Fat Percentage Vs. Skinfold Calipers Skinfold calipers are an affordable, low tech body fat analyzer. Underwater Hydrostatic bodyweight calculates the differences between readouts underwater and online, which allows experts to determine body fat percentage and density.
Air Displacement Plethysmography This method works very similarly to the underwater method. For example: The frequency of weighing has been shown to have a direct correlation with increased fat loss and the adoption of healthier dietary habits. Another bonus of daily weigh-ins is the ability to calculate a daily weight average or even have this done for you in an app with the FitTrack Dara.
This helps you cut through the noise of daily fluctuations to provide a more accurate daily weight, increasing motivation as the daily average begins to fall. Smart products read more than just fat percentage and weight.
Having consistent access to your body water percentage allows you to catch a decrease in total body water so you can be sure to adjust your habits and keep your hydration up. But can scales that reportedly measure things like body mass index and body fat percentage be helpful?
Cleveland Clinic is a non-profit academic medical center. Advertising on our site helps support our mission. We do not endorse non-Cleveland Clinic products or services. Several studies have looked at different digital body fat scales and how they stack up compared to the types of devices that are used in clinical research.
Leslie Heinberg, PhD , Director of Enterprise Weight Management at Cleveland Clinic, says research has found that most of these scales are fairly inaccurate and tend to overestimate body fat percent. Plus the extra bells and whistles on these products can produce distressing results. Handheld BMI machines use bioelectrical impedance, passing a signal through your body and measuring the time it takes to travel through different types of tissue. BMI is calculated using just your weight and height, so it is just an estimate of whether you're likely to fit within the healthy weight range.
Any BMI between For example, if you're 5 feet, 7 inches tall, you're considered a healthy weight if you're between and pounds. This measurement doesn't take into account how much muscle a person has, however, and it can overestimate fat in very muscular people or underestimate in elderly individuals.
The handheld machines sometimes used to measure body fat rely on bioelectrical impedance, which estimates your body fat using a painless electrical signal that's sent through your body. Because it takes different amounts of time for the signal to pass through fat, muscle, bone and water, the time it takes it to move from one side of your body to the other can be used to estimate body fat.
The electrical signal easily passes through water, goes a bit more slowly through muscle and bone and slows down even further when it goes through fat. Thus, the more muscle and the less fat you have, the faster the signal reaches the other side of your body. The equations used for this take into account your gender, weight, height and activity level, as these factors can all affect body composition.
You can purchase scales that use this type of technology, as well as handheld devices that measure from hand to leg, finger to finger, hand to hand or leg to leg. The healthy range for body fat for women is between 19 and 32 percent; for men, it's from 16 to 25 percent.
A number of factors can affect the accuracy of the handheld BIA devices available to consumers, and some device measurements are more accurate than others. Those that measure from leg to leg are more accurate than those that go from hand to hand or finger to finger, according to a study published in the International Journal of Exercise Science in
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