how-does-dehydration-eg-after-heavy-exercise-typically-affect-a-single-frequency

Question

How does dehydration (e.g., after heavy exercise) typically affect a single-frequency BIA measurement of body fat percentage if the device and algorithm do not account for hydration status?

Accepted Answer

Dehydration reduces electrical conductivity (increases impedance), causing the device to overestimate body fat percentage

Answer

Dehydration has no impact on BIA estimates because impedance is independent of total body water

Answer

Dehydration causes BIA to estimate bone mineral density directly rather than fat percentage, making the body fat output irrelevant

Answer

Dehydration increases conductivity and therefore causes the device to underestimate body fat percentage markedly