How can water loss from the body be quickly estimated at the end of a physical activity?

Question

Quizplus · Accepted Answer

The best way to estimate water loss from the body at the end of a physical activity is to take the difference in body weight (lbs) before and after the event and multiply by 2 to determine cups of water loss. This is because water weighs approximately 1 pound per cup, and any weight lost is likely to be due to water loss. However, it should be noted that this method may not be entirely accurate due to other factors that can affect body weight (e.g. food consumption, sweating, etc.).

How Can Water Loss from the Body Be Quickly Estimated