Assuming that the concentration of sodium in urine and sweat

Assuming that the concentration of sodium in urine and sweat is 200 mEq/L and 1100 mg/kg, respectively, how much sodium is lost each day (in grams) through sweat and urine for: a.A person at rest in a comfortable environment b.A person undergoing prolonged exercise

Solution

Ans:

Vigorous exercise is one way sodium levels in the body are depleted. In fact, as you sweat during exercise, you lose sodium -- though the amount of mineral loss may vary substantially from person to person.

According to Power Bar, sodium losses during exercise are highly variable and depend on a number of factors - including air temperatures, exercise length and intensity, and hydration status. In fact, there is no specific answer about the amount of sodium that an individual will lose during an exercise session. The Ultramarathon Cycling Association estimates that in 1 quart of sweat or about the equivalent of a 1/2 pound of body weight - most individuals will lose about 1,000 milligrams of sodium.

Here in the above case A person at rest in a comfortable environment lost his Sodium through urine i.e 200 mEq/L and a person undergoing prolonged exercise lost his Sodium through sweat i.e., 1100 mg/kg