{
    "id": 7996,
    "date": "2018-11-01T14:00:43",
    "date_gmt": "2018-11-01T14:00:43",
    "guid": {
        "rendered": "https:\/\/uk.inbody.com\/?p=7996"
    },
    "modified": "2018-11-01T14:00:43",
    "modified_gmt": "2018-11-01T14:00:43",
    "slug": "bia-once-flawed-not-anymore",
    "status": "publish",
    "type": "post",
    "link": "https:\/\/ro.inbody.com\/en\/bia-once-flawed-not-anymore\/",
    "title": {
        "rendered": "BIA: Once Flawed, Not Anymore"
    },
    "content": {
        "rendered": "<p>In the world of body composition analysis, bioelectrical impedance analysis (BIA) is almost a dirty word.<\/p>\n<p>Although well-known and popularly used in consumer home\/fitness equipment, BIA technology has been disregarded for years\u00a0when it comes to medical or professional purposes.\u00a0 And for good reason:\u00a0<strong>many early BIA devices had serious design flaws<\/strong>.\u00a0 Even today, many people immediately dismiss BIA technology as technology that can only give ballpark estimations, even in the best of circumstances.<\/p>\n<p>However, BIA has come a very long way over the past few decades.\u00a0 So far, in fact, that some bioelectrical impedance devices are now producing results that nearly\u00a0<strong>mirror results generated by DEXA<\/strong>, an industry-regarded gold standard.<\/p>\n<p>Really?\u00a0<a href=\"http:\/\/www.ncbi.nlm.nih.gov\/pubmed\/?term=Accuracy+of+direct+segmental+multi-frequency+bioimpedance+analysis+in+the+assessment+of+total+body+and+segmental+body+composition+in+middle-aged+adult+population\">Yes, really<\/a>.<\/p>\n<p>Imagine if you could determine body composition with a device that used technology which\u00a0had all the convenience of traditional BIA, but combined it with the precision and reproducibility of a gold standard procedure.\u00a0 Imagine if that device was small enough to be placed anywhere: a doctor\u2019s office, a gym, even a bedroom.\u00a0 Imagine if that device could track your results forever and illustrate your progress over time.<\/p>\n<p>Today, devices like these exist.<\/p>\n<p>If you haven\u2019t interacted with BIA technology recently, or the last time you encountered it was in a Fitness Science textbook in a college class years ago, consider this your crash course update on modern, 21<sup>st<\/sup>\u00a0century, BIA technology.<\/p>\n<h2><strong>Why BIA Gets a Bad Name<\/strong><\/h2>\n<p>Many of the valid concerns people have about using BIA technology stem from outdated, older technology.\u00a0 If you\u2019re concerned about the accuracy of BIA devices, you probably have very legitimate reasons.\u00a0 These devices fall into three general groups:<\/p>\n<ol>\n<li>BIA Scales<\/li>\n<li>Handheld BIA Devices<\/li>\n<li>\u201cWhole Body\u201d Impedance Devices<\/li>\n<\/ol>\n<p>Let\u2019s look at each one to see what the concerns are and where they come from.<\/p>\n<ul>\n<li>\n<h3>BIA Scales<\/h3>\n<\/li>\n<\/ul>\n<p>When people think about BIA devices that measure body fat, many of them think about something that looks similar to this:<\/p>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0832\/8945\/files\/BIA_1_grande.png?6591425938445054800\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>This is a traditional digital scale that incorporates BIA technology to determine body fat percentage.\u00a0 To use it, you must enter your age, height, and gender.\u00a0 Some devices require body type, too. Then, you stand on the scale while it measures your weight.\u00a0 Once the scale has all the required data, it computes your body fat percentage using BIA technology.<\/p>\n<p>However, the accuracy of such a device has some serious flaws.<\/p>\n<p>First of all, what many people may not realize is BIA scales such as these\u00a0<strong>only send a current up one leg and down the other<\/strong>.\u00a0 This means that impedance (the metric that all BIA devices use to compute results) is only directly measured in the legs.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0832\/8945\/files\/bia_foot_scale_grande.JPG?400011047683417858\" \/><\/p>\n<p>The upper body and arms?\u00a0 Estimated based on the results for the legs.\u00a0 This means that\u00a0<a href=\"http:\/\/www.exrx.net\/Kinesiology\/Segments.html\">roughly 40%<\/a>\u00a0of your Lean Body Mass is used to determine a body fat percentage that is supposed to account for 100% of your body.<\/p>\n<p>If you feel skeptical about trusting your results from a BIA scale, you\u2019re absolutely correct to do so.<\/p>\n<ul>\n<li>\n<h3>Handheld BIA Devices<\/h3>\n<\/li>\n<\/ul>\n<p>Handheld BIA devices \u2013 such as the ones carried by many gyms \u2013 are no better, and due to the relatively smaller size of the arms compared to the legs may actually be even more unreliable.\u00a0 Those devices operate similarly as BIA scales, except instead of measuring the legs, handheld BIA devices\u00a0<strong>send the current from one arm to the other and then estimate everything from your chest down<\/strong>.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0832\/8945\/files\/handheld-bia-device_grande.jpg?15955042515873399242\" alt=\"\" \/><\/p>\n<p>This means that these devices are guessing what your overall body composition is based on the composition of your arms.\u00a0 This can lead to inaccurate results.\u00a0 If your arms are the most muscular part of your body but you carry the majority of your fat in your midsection, a handheld BIA device will not be able to account for that.<\/p>\n<p>Because handheld BIA devices don\u2019t just report muscle and fat for the arms and give results for the entire body,\u00a0<strong>these results are not trustworthy<\/strong>. Handheld BIA devices only directly measure the arms. Everything else is just estimation and guesswork.<\/p>\n<ul>\n<li>\n<h3>\u201cWhole Body\u201d Impedance Devices<\/h3>\n<\/li>\n<\/ul>\n<p>What about conventional BIA devices, the ones that require you to lie down and have a technician attach adhesive electrodes to the whole right side of your body?\u00a0 Surely those must be accurate.<\/p>\n<p>Just like scales and handhelds, these devices\u00a0<strong>don\u2019t measure the entire body, even though they might appear to do so<\/strong>.\u00a0 However, instead of completely missing the upper or lower half of the body like BIA scales and handhelds do, these devices operate differently \u2013 but are just as flawed.<\/p>\n<p>In the case of conventional BIA devices, four electrodes are placed on the right half of the body.\u00a0\u00a0 The current is sent from the arm, through the body, and out through the leg.\u00a0 This is somewhat misleadingly referred to as the \u201cWhole Body Impedance\u201d method.<\/p>\n<p>Why\u00a0<strong>misleading<\/strong>? Take a look below:<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0832\/8945\/files\/whole-body-impedance-device_grande.jpg?14436249758653383398\" alt=\"\" \/><\/p>\n<p>Although \u201cwhole body\u201d might suggest that these devices actually measure the whole body, in reality these machines only directly measure approximately half (usually the right side) and then estimate the remainder.<\/p>\n<p>The core problem with these devices is that they treat the entire body as a single \u201ccylinder.\u201d\u00a0 This means that when the machine is collecting information, it treats your arms in the same way it treats your trunk\/torso; never mind that the trunk\u2019s composition is significantly different than an arm (it contains the internal organs, for instance, and contains a greater amount of Lean Body Mass).<\/p>\n<p>This is a problem when measuring fat and muscle.\u00a0 Although similarities among genders exist, everybody and every\u00a0<strong>body<\/strong>\u00a0is different.\u00a0 Men tend to collect the majority of their fat around their abdomen (android obesity), whereas women tend to collect in the arms and legs in addition to their midsections (gynoid obesity).<\/p>\n<p>What would happen if a particular person didn\u2019t conform to these assumptions? False readings and inaccurate results.<\/p>\n<h2><strong>The Future: DSM-BIA<br \/>\n<\/strong><\/h2>\n<p>For many people, the devices described above are the only BIA devices they are familiar with.\u00a0 That\u2019s why, including for those described above, people have very good reasons for dismissing BIA technology.\u00a0<strong><br \/>\n<\/strong><\/p>\n<p>However, the industry has recognized the flaws in these BIA devices for some time and, in the last few decades, has responded.<\/p>\n<p><a href=\"https:\/\/inbodyusa.com\/general\/technology\/\">Direct Segmental Multi-Frequency Bioelectrical Impedance Analysis<\/a>\u00a0(DSM-BIA) is a new, modern approach to BIA technology that, for the first time, directly measures the entire body.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0832\/8945\/files\/dsm_bia_grande.jpg?400011047683417858\" alt=\"\" \/><\/p>\n<p>Unlike any of the previous methods or devices above, devices that employ DSM-BIA do not leave any section of the body unaccounted for.\u00a0 In order to do this accurately, the body is divided into 5 segments and the impedance for each segment is measured independently.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0832\/8945\/files\/BIA_10.JPG?10216028706023350704\" \/><\/p>\n<p>Once the impedance values for each segment are known, the device interprets the raw data and translates it into useful values such as:<\/p>\n<ul>\n<li>Body Fat Percentage<\/li>\n<li>Total Body Water<\/li>\n<li>Lean Body Mass<\/li>\n<\/ul>\n<p>Because all 5 segments are measured independently of each other, this allows for more advanced analyses. \u00a0The below example shows the amount of Lean Body Mass in pounds in each segment of the body:<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0832\/8945\/files\/BIA_6_grande.JPG?6920577250069337279\" alt=\"\" \/><\/p>\n<p>Using a device that employs DSM-BIA technology allows a doctor, researcher, or fitness professional to paint a more complete picture of a client\u2019s body composition.\u00a0 It allows each segment of the body to be measured independently, just as DEXA does, but does it much quicker and more conveniently than DEXA \u2013a major advantage of using a BIA device.<\/p>\n<h2><strong>Why Trust This Tech?<\/strong><\/h2>\n<p>DSM-BIA represents a major improvement over all previous BIA devices.\u00a0 But in order to understand this technology and be confident in the results, you\u2019ll need a brief overview on the basics of how BIA devices work.<\/p>\n<p>All BIA devices operate by sending a small electrical current through fluid, which in the human body, is body water.\u00a0 The current enters and exits via electrodes that come into contact with the skin.\u00a0 As the current travels throughout your body water, it encounters muscle cells, fat cells, skin cells, etc.\u00a0 Each of these has a certain ability to oppose the current slightly as it travels on its path towards the exit point.<\/p>\n<p>Once the current finally reaches its endpoint, it will have lost some of its voltage on its journey through body water.\u00a0 From here, impedance is determined.\u00a0 BIA devices, including DSM-BIA devices, take impedance values and translate them into useful information that people can readily understand, like Body Fat Percentage and Lean Body Mass.<\/p>\n<p>If all BIA devices use the same basic principle, then what makes DSM-BIA different?<\/p>\n<p>Consider the example of the \u201cWhole Body Impedance\u201d devices.\u00a0 While on the one hand they\u00a0<strong>appear to be<\/strong>\u00a0measuring the entire body and delivering trustworthy results, on the other, they treat the body as though it were a single tube of water, irrespective of body shape.\u00a0 This means that the opposing effect that the current experiences as it travels through the body gets lumped together as a single impedance value.<\/p>\n<p>This is a problem because due to the width of the arms and legs vs. the width of the upper body, impedance values actually\u00a0<strong>vary quite significantly<\/strong>.\u00a0 Impedance values for the arms and legs can be\u00a0<strong>10+ times greater<\/strong>\u00a0than those for the trunk, as shown below (TR = trunk):<\/p>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0832\/8945\/files\/BIA_2_large.png?2593472611936040307\" \/><br \/>\nAs you can see, the values for the trunk are much, much lower than those of the arms and legs.\u00a0 A \u201cWhole Body\u201d impedance device\u00a0<strong>would have taken all five of these values and lumped them into a single \u201cwhole body\u201d result.<\/strong>\u00a0\u00a0This is where Whole Body impedance gets its name and where it gets its inaccuracy.<\/p>\n<p>As for BIA scales and handheld BIA devices?\u00a0 A BIA scale will produce results that would look like this:<\/p>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0832\/8945\/files\/BIA_3.png?2545323074284822687\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>The handheld BIA device will only be able to measure the arms:<\/p>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0832\/8945\/files\/BIA_4.png?440875056550684885\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>You should notice something:\u00a0<strong>neither of them will measure the all-important trunk<\/strong>.\u00a0 Only devices that use DSM-BIA paint a complete picture, and only DSM-BIA devices will deliver results that stack up against the gold standards.\u00a0 All other devices can only offer estimations at best.<\/p>\n<h2><strong>An Easier, Better, More Accurate Way<br \/>\n<\/strong><\/h2>\n<p>DSM-BIA technology represents the future of body composition analysis and BIA technology.\u00a0 Older BIA devices have major design flaws that limited their reliability and the reproducibility of their results;\u00a0<strong>DSM-BIA technology has responded to those flaws.<\/strong><strong><br \/>\n<\/strong><\/p>\n<p>By improving BIA technology, DSM-BIA devices blend the precision expected from gold standard devices with the convenience and ease-of-use provided by traditional BIA devices.\u00a0 It is possible to have the best of both worlds, after all.<\/p>\n<p>Source:\u00a0https:\/\/inbodyusa.com\/blogs\/inbodyblog\/bia-technology\/39971073-bia-once-flawed-not-anymore\/<\/p>",
        "protected": false
    },
    "excerpt": {
        "rendered": "<p>In the world of body composition analysis, bioelectrical impedance analysis (BIA) is almost a dirty word. Although well-known and popularly used in consumer home\/fitness equipment, BIA technology has been disregarded&#8230;<\/p>",
        "protected": false
    },
    "author": 18,
    "featured_media": 7997,
    "comment_status": "closed",
    "ping_status": "open",
    "sticky": false,
    "template": "",
    "format": "standard",
    "meta": {
        "inline_featured_image": false,
        "footnotes": ""
    },
    "categories": [
        197,
        192
    ],
    "tags": [],
    "class_list": {
        "0": "post-7996",
        "1": "post",
        "2": "type-post",
        "3": "status-publish",
        "4": "format-standard",
        "5": "has-post-thumbnail",
        "7": "category-fat-mass",
        "8": "category-health"
    },
    "_links": {
        "self": [
            {
                "href": "https:\/\/ro.inbody.com\/en\/wp-json\/wp\/v2\/posts\/7996",
                "targetHints": {
                    "allow": [
                        "GET"
                    ]
                }
            }
        ],
        "collection": [
            {
                "href": "https:\/\/ro.inbody.com\/en\/wp-json\/wp\/v2\/posts"
            }
        ],
        "about": [
            {
                "href": "https:\/\/ro.inbody.com\/en\/wp-json\/wp\/v2\/types\/post"
            }
        ],
        "author": [
            {
                "embeddable": true,
                "href": "https:\/\/ro.inbody.com\/en\/wp-json\/wp\/v2\/users\/18"
            }
        ],
        "replies": [
            {
                "embeddable": true,
                "href": "https:\/\/ro.inbody.com\/en\/wp-json\/wp\/v2\/comments?post=7996"
            }
        ],
        "version-history": [
            {
                "count": 2,
                "href": "https:\/\/ro.inbody.com\/en\/wp-json\/wp\/v2\/posts\/7996\/revisions"
            }
        ],
        "predecessor-version": [
            {
                "id": 10241,
                "href": "https:\/\/ro.inbody.com\/en\/wp-json\/wp\/v2\/posts\/7996\/revisions\/10241"
            }
        ],
        "wp:featuredmedia": [
            {
                "embeddable": true,
                "href": "https:\/\/ro.inbody.com\/en\/wp-json\/wp\/v2\/media\/7997"
            }
        ],
        "wp:attachment": [
            {
                "href": "https:\/\/ro.inbody.com\/en\/wp-json\/wp\/v2\/media?parent=7996"
            }
        ],
        "wp:term": [
            {
                "taxonomy": "category",
                "embeddable": true,
                "href": "https:\/\/ro.inbody.com\/en\/wp-json\/wp\/v2\/categories?post=7996"
            },
            {
                "taxonomy": "post_tag",
                "embeddable": true,
                "href": "https:\/\/ro.inbody.com\/en\/wp-json\/wp\/v2\/tags?post=7996"
            }
        ],
        "curies": [
            {
                "name": "wp",
                "href": "https:\/\/api.w.org\/{rel}",
                "templated": true
            }
        ]
    }
}