elcetronic b/f machine

[beach_bum_dude]

I went to the gym a while ago and one of the trainers there was showing off his new device, measures b/f and bmi from just holding the device. This thing said my b/f was 24.7 and my bmi was 22.6......the last time I was checked with calipers I was 14% bf......wtf

 

[cindylou]

i'd trust calipers over anything

 

[chris302001]

I thought this was gonna be a Sybian thread...

 

[Humble Pride]

I went to the gym a while ago and one of the trainers there was showing off his new device, measures b/f and bmi from just holding the device. This thing said my b/f was 24.7 and my bmi was 22.6......the last time I was checked with calipers I was 14% bf......wtf

Does it resemble a large gamepad - and you hold your arms straight out in front of you (while holding it's two handles)?

If so - they are not new, and they are fairly accurate, but nowhere near calipers, and now even in the same league as getting dunked....

 

[miplank]

I went to the gym a while ago and one of the trainers there was showing off his new device, measures b/f and bmi from just holding the device. This thing said my b/f was 24.7 and my bmi was 22.6......the last time I was checked with calipers I was 14% bf......wtf

hit the gym fat ass!



haha...just kidding. Fuck electronics...You want accurate get dunked. Or calipers if you don't have access to a dunk tank

 

[chewyxrage]

those things are pieces of shit.....fairly accurate my ass, every one I've seen has been off by 10%

 

[beach_bum_dude]

those things are pieces of shit.....fairly accurate my ass, every one I've seen has been off by 10%

That's exactly what this one was...10%, but I admit it was a scary moment!! Hit the gym fat ass...LOL, and thanks for your support!! j/k

 

[Creepusmaximus]

The amount of water in your body will screw it up one way or another.

 

[Jocques Straap]

From the studies I've seen, Bioelectrical impedance analysis of body fat is accurate to about 3-5%. They also seem to error on the high side.
Calipers are accurate to about 3-5%, while they error on the low side. This is also when an experienced user is using them. The average joe, or the average trainer, will result in less accuracy.

Some tips for the best Measurement via BIA:

1. Place electrodes according to manufacturer specifications (sites should be measured). Misplacing the electrode by as little as one centimeter decreases measurement accuracy.
2. Body position affects BIA. The test is most accurately done in the supine position. Limbs should not be crossed.
3. No eating or drinking within four hours of the test.
4. No exercise within 12 hours of the test.
5. No alcohol consumption within 48 hours of the test.
6. No diuretics within seven days of the test.
7. Urinate within 30 minutes of the test.


....extreme muscular hypertrophy presents special problems that may limit the accuracy of body composition assessment via BIA. A recent study by Loren Cordain at Colorado State University found inconsistencies among commonly used procedures for estimating body fat percentages in competitive male body builders. The average percentage of body fat for the body builders was 16.7% for BIA, 12.5% for underwater weighing and 10.4% for skinfolds. BIA overestimated the body fat percentage because equations for men who did not weight train were applied to highly muscled athletes.......

Measuring up: evaluating the most commonly used methods to determine body fat | American Fitness | Find Articles at BNET

 

[beach_bum_dude]

From the studies I've seen, Bioelectrical impedance analysis of body fat is accurate to about 3-5%. They also seem to error on the high side.
Calipers are accurate to about 3-5%, while they error on the low side. This is also when an experienced user is using them. The average joe, or the average trainer, will result in less accuracy.

Some tips for the best Measurement via BIA:

1. Place electrodes according to manufacturer specifications (sites should be measured). Misplacing the electrode by as little as one centimeter decreases measurement accuracy.
2. Body position affects BIA. The test is most accurately done in the supine position. Limbs should not be crossed.
3. No eating or drinking within four hours of the test.
4. No exercise within 12 hours of the test.
5. No alcohol consumption within 48 hours of the test.
6. No diuretics within seven days of the test.
7. Urinate within 30 minutes of the test.


....extreme muscular hypertrophy presents special problems that may limit the accuracy of body composition assessment via BIA. A recent study by Loren Cordain at Colorado State University found inconsistencies among commonly used procedures for estimating body fat percentages in competitive male body builders. The average percentage of body fat for the body builders was 16.7% for BIA, 12.5% for underwater weighing and 10.4% for skinfolds. BIA overestimated the body fat percentage because equations for men who did not weight train were applied to highly muscled athletes.......

Measuring up: evaluating the most commonly used methods to determine body fat | American Fitness | Find Articles at BNET

I just walked up and tried it out, and didn't follow any of the rules you mentioned. Thanks for the info bro.