What is the formula for calculating sweat rate?

The correct formula for calculating sweat rate involves determining the volume lost from sweat during an exercise period, and option C accurately captures this process. The formula states to take the difference in weight in grams (which reflects the body mass lost during exercise), add the amount of fluid consumed (drink in mL), and subtract the volume of urine produced. This approach effectively quantifies the net fluid lost, accounting for both the hydration consumed and the fluid excreted through urine, leading to an accurate calculation of sweat loss.

Understanding this formula is key in sports nutrition for evaluating hydration status and optimizing fluid intake for athletes. By quantifying these variables, sports dietitians can better advise athletes on their hydration strategies to maintain performance and prevent dehydration.

The other options do not accurately represent the relationship between these variables needed to determine sweat loss, either misplacing how to incorporate fluid intake and urine output or failing to represent the loss accurately through the exercise period. Therefore, option C stands out as the correct formulation for calculating sweat rate.