Hydrostatic Under Water Weighing w/ Isadora Williams Olympic Figure Skater
Video taken from the channel: Vivo Phys Evan Matthews
Measuring Body Fat Percentage In Hydrostatic Weight Tank
Video taken from the channel: Odum Idika
Checking My Body Fat% | Does Hydrostatic Weighing Work? | 135lbs Curls
Video taken from the channel: TheSwolefessor
BODY FAT TEST Comparison: Hydrostatic, Skin Fold, DEXA Scan, BIA
Video taken from the channel: Alan Thrall
Hydrostatic Body Fat TestingThe most accurate way!
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Hydrostatic weighing how-to
Video taken from the channel: Hawaii Concussion Awareness and Management Program
Hydrostatic Weighing
Video taken from the channel: Utah State University Extension
By Weighing Yourself Underwater Hydrostatic weighing is a method of determining body fat percentage where you are weighed in and out of water. This relies on some fun math having to do with measuring the density of your body in water. Lean mass (bone, muscle, connective tissue, and organs) is more dense than water, while fat is less dense.
Hydrostatic weighing, also referred to as “underwater weighing”, “hydrostatic body composition analysis”, and “hydrodensitometry” is a technique for measuring the density of a living person’s body. It is a direct application of Archimedes’ principle, that an object displaces its own volume of water.On the tails of the hydrostatic weighing method is a revolutionary body composition weighing method known as the Dexa (DXA) Scan.
This scan from DexaFit is designed to not just measure the amount of body fat you’re carrying, but also tell you where it is in the body. The Dexa Scan is the most accurate method for body composition analysis.“Hydrostatic weighing, also referred to as ‘underwater weighing,’ it is a technique for measuring the density of a living person’s body. It is a direct application of Archimedes’ principle, that an object displaces its own volume of water.Hydrostatic weighing borrows Archimedes’ principle in physics to measure body fat and lean mass through full underwater submergence.
In the case of body composition testing, lean mass is denser than water, while fat mass is less dense than water. Therefore, a person with more fat will weigh less under water than someone with more muscle.Underwater weighing is based upon Archimedes Principle which states that the buoyant force on a submerged object is equal to the weight of the fluid that is displaced by the object. We can use this principle to determine a person’s percentage of body fat because the density of fat mass and fat-free mass are constant.Hydrostatic weighing, or hydrodensitometry, is the most accurate test used to measure the body composition of a subject till date.
The other terms used for this test are ‘underwater weighing’ and ‘hydrostatic body composition analysis’. It helps determine the body density of a ‘subject’ or human body. Would you like to write for us?-maintaining the increased caloric intake is necessary to maintain the higher body weight The thermal effect of the diet can affect energy balance (Dietary composition) -it takes more energy to digest, absorb, transport, and metabolize protein and carbs. vs. fat.
If each test is performed correctly according to the recommended guidelines, hydrostatic underwater weighing has small percentage error (+/1.5% error), and has been labelled the gold standard assessment of fat mass/fat free mass.Underwater weighing, also known as hydrostatic weighing, is a method of calculating body fat percentage based off body density. Underwater weighing takes place in specially designated pools and/or water tanks designed for hydrostatic measurement. The test is usually only available at universities, research facilities, and some fitness centers.
Hydrostatic weighing is the “gold standard” and the most widely used laboratory procedure for measuring body composition. It is useful to have an assessment such as this when trying to make physical changes because body weight by itself doesn’t tell us how our weight is distributed; how much is lean and how much is fat.Hydrostatic Weighing Hydrostatic weighing, also known as Hydrodensitometry or underwater weighing, is a classic measure of body composition. The test involves the subject being lowered into a water tank until all body parts are emerged, expelling all the air from the lungs, then weighed.Hydrostatic (underwater) weighing is generally regarded as the “gold standard” for body composition assessment.
Because body fat is less dense than water, it increases one’s buoyancy. Fat-free mass is denser than water and causes one to sink. After correcting for residual volume, body density can be calculated based on the underwater weight.Question 11 11. _ is a precise way to measure body fat percentage using underwater weighing. Hydrostatic weighing.
Waist to hip ratio. Bioelectrical impedance analysis. Skinfold measurements.Popularity.
National and international sport professionals who assess body composition prefer ADP to UWW (i.e. hydrostatic weighing), according to a 2013 survey [10]. However, these methods were the least popular compared with the other popular body composition assessment methods, including skinfold assessment, bioelectrical impedance analysis (BIA), and dual energy x-ray.
List of related literature:
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| from The Ketogenic Diet: A Complete Guide for the Dieter and Practitioner |
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| from Physical Fitness and Wellness: Changing the Way You Look, Feel, and Perform |
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| from The Biophysical Foundations of Human Movement |
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| from The Encyclopedia of Nutrition and Good Health |
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| from The DASH Diet Action Plan: Proven to Lower Blood Pressure and Cholesterol Without Medication |
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| from Natural Bodybuilding |
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| from Human Biology: An Evolutionary and Biocultural Perspective |
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| from Transcend: Nine Steps to Living Well Forever |
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| from Dietary Reference Intakes for Water, Potassium, Sodium, Chloride, and Sulfate |
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| from Maternal Child Nursing Care |
31 comments
is very easy to measure the volume of the loungs. Stop asking for the obvious stuff.
I stopped at 3:45 to guess you have 4% body fat. OOHHHH, I was close! You come in at 3.5%! Dude, you got a nice, NICE physique for a powerlifter, btw. I mean, I’ve seen some really flabby youtube powerlifters, lol. Anyway, wish I can test my body fat tho. Best video on body fat science!
when some one say i am a natural competing body builder you know they are lyin
Alan you lucky bastard, get to have abs at 20+, also know it’s cause you train your ass off ��
I feel like it’s impossible to have visible abs and be over 20%
Are you still going to the Game Changer’s 21 day vegan mass building challenge?
Awesome vid!!! Those scales always read higher IMO. I wish you’d tried a bod pod too, I was curious how that compares. I was thinking 17-18% for you.
I actually looked for scientific literature comparing different body composition methods and couldn’t find any. Some random youtuber had to do the work… Thanks my good man.
3% drop is a 3% drop. is not true. Thats only true if its linear and most likely the impedence method is not.
I guessed 18. Only because you look like me.
However, I have zero method so my guess means nothing.
PS, them dudes with the stupid bicep poses at 6:15, can’t hit harder or beat me at arm wrestling.
natural bodybuilder but looks suspeciously like hes on roids xD
I think people are sometimes really dumb when calculating bodyfat. Let me explain: we associate a certain degree of visual leanness to a percentage. What we often forget is to take into account the person’s total bodyweight. My man Alan has a big amount of muscle mass. My guess is in 18%-20%
Hydrostatic 17,8%
DEXA Scan: 22%
Skin fold: 18,6%
Body Scale: 25,7%
Coach 1: 23%
Coach 2: 18% 22%
Do not take gym advice from someone who looks like that with shirt off
Without advanced imaging equipment RV cannot be measured in a human in vivo. It’s often estimated from forced vital capacity, which can be measured using a spirometer. There are (less expensive) stand-alone spirometers that simply report lung volumes, or the pneumotach (or other flow meter equivalent) on an indirect calorimeter (“metabolic cart”) can be used.
Also common is the estimation of RV using the patient’s anthropomorphic data. These equations, as well as the FVC spirometry protocols, are all easily accessible via a simple google search.
Bio-impedance is highly inaccurate; because the machine is essentially subtracting two similar numbers (resistance values), each with large errors, and calculating the percent body fat from the rather small difference between these resistance values (which is comparable in size to the error range), thus the results are highly inaccurate (hence all the questions such as how old, athlete or not, male or female etc. to fiddle the result. If the method of determination was truly accurate no questions would be required.
Three years later, but I do have to wonder if you can measure scale accuracy by doing consecutive weighings. It would be just like one of those companies to have the software detect that the same person is using it twice in a row (highly similar weight, short time between reading) and simply reissue the same number. I’ve got a scale that looks similar to that one, minus the body fact gizmo, and I have to fool it by using a foot to get a dissimilar weight into it before going again. It obviously is resetting as the weight will move slightly in that case.
I have some home body fat scales, different brand, and they measured me as 40% for about a week then it jumped up to 60%. Scales in the gym measure me at 17% so those home scales aren’t just inaccurate they can be inconsistent.
Hello my name is Alberto Montoya, you killed my father. prepare to die.
I have the exact same fat composition as you. Right now my upper body is certainly not looking lean but compared to my lower body it is pretty lean
The only truly accurate way to measure body fat is an autopsy.
You should do a Dexa-Scan. Bro, your in awesome shape, but 3.5% is unhealthy, I would have put you to be a respectable 8-10% really the ideal level of being as low as healthily possible.
I appreciate the experiment.. I guess we will have to just go by the mirror and keep cutting until the body looks sufficient ����
Aw that’s some bullshit bro. I knew it was a lot lower but I overestimated for the fun of it. Maybe next time I get my 50 cent discount but damm you lean. EDIT: There’s still hope. I may give my 50 cent
if you feel the need to present yourself as a “natural” bodybuilder you ain’t natural boi
Wow..I didnt know bodybuilders drop to 3% in competition thats around aneroxia levels
PSS, why does anyone wanna be 3-6% body fat and useless as a nude mag?
I would say, you do look more like 23-24%. Now, let’s watch your video.
At the university of Physical education I was taught that the water is the most accurate one
Yeah….I would say you are a little chunky. If you just cut out the ice cream, oatmeal & bananas you would naturally loose some of that baby fat