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What would Heather's sweat rate be given the following 3-hour triathlon training?

- Pre-exercise weight (voided) = 135 lbs (61.4 kg).
- Post-exercise weight (voided) = 131 lbs (59.5 kg).
- Fluid consumed during exercise = 30 ounces (887 ml) per hour.

Answer :

Final answer:

Heather's sweat rate during her 3-hour triathlon training is around 51.33 ounces per hour. This was calculated by adding the weight loss in ounces to the fluid she consumed and dividing by the workout duration.

Explanation:

To calculate Heather’s sweat rate during her 3-hours triathlon training, we need to consider her pre-exercise and post-exercise weights, as well as the fluid she consumed during exercise. Heather’s pre-exercise weight was 135 lbs (61.4 kg), and her post-exercise weight was 131 lbs (59.5 kg), indicating a loss of 4 lbs (1.9 kg). Since 1 pound is approximately equivalent to 16 ounces of water, this corresponds to a loss of 64 ounces. Heather drank 30 ounces of fluid per hour, which adds up to 90 ounces over the three-hour period. To determine her total fluid loss, we add the weight loss in ounces (64 ounces) to the amount of fluid consumed (90 ounces), resulting in a total of 154 ounces. Her sweat rate is the total fluid loss divided by the exercise duration in hours, so her sweat rate is 154 ounces/3 hours, which is approximately 51.33 ounces per hour.

It's important to remember that the goal for hydration is to replace the fluids lost through sweat during exercise without overhydrating. The variability of the sweat rate will depend on several factors, including body composition, environmental conditions, and the intensity of the exercise.

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