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It would be great if those values were precisely known, and many are. But it has been found, for example, that athletes and African-Americans happen to have slightly higher density bones than average. It would also be great if we knew the exact percentages of bone, blood, and the rest are in our bodies. bbw escort But there are variations here, too. Some people bbw escort are "big-boned" and others are "barrel-chested" or "thin-as-a-rail". These factors all affect the relative proportions of the component materials bbw escort of us. The point being: even the best analysis has a certain error factor. It works out that these variations among people seem to have a collective effect of well under 1% regarding bodyfat analysis. This is actually why the hydrostatic weighing method can have a repeatable accuracy of better than 1%. Fortunately, the proportions of bone and lean muscle tissue in an individual non-body-builder are fairly consistent, and the proportion of blood in our bodies seems to be fairly consistent, too.
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