The Immersion TechniqueThis is the most accurate approach. It involves submerging a person in a special water tank and determining how much water they displace. This information, along with the person's weight, is used to calculate their density.
What do you suppose is meant by "how much water they displace"? Why is this quantity used "along with" weight, if the immersion measures weight?
Is it within your mental capacity to undestand that displacement provides a measurement of volume, and when put in a formula along with weight, provides density?
And density provides an estimate of body fat?
Is it within your mental capacity to undestand that displacement provides a measurement of volume, and when put in a formula along with weight, provides density?
Is it within your mental capacity to recall your first question about measuring a person’s mass?
They don’t dunk people in tanks just for the fun of finding out anything about vloume but how fat they are. Fat MASS...as a percentage of body WEIGHT.
Conversely, if the issue was only weight, they’d merely weigh a person and be done with it.
The two are taken together to determine a person’s percentage of body fat, or fat MASS, and this is a way of determing it, and body fat MASS is ultimately determined in number of pounds, or kilos, not volume.
It’s just that we can’t cut a person up and separately weigh their muscles and then weigh their fat.
Volume isn’t what they’re looking for, they could care less about a person’s volume ultimately, that measurement is a means to an end...body fat MASS as a percentage.