Which of the following recommendations would you make to your client who plans on playing tennis on a very hot and humid afternoon?

Salt tablets in large quantities can cause gastrointestinal distress and hypernatremia; sodium needs during exercise are better met through sports drinks or food, not concentrated tablets.

High protein intake is not a hydration or heat-performance strategy; protein does not meaningfully contribute to fluid balance or thermoregulation during exercise.

Fluids in the range of 15 to 22.2 degrees Celsius (59-72 degrees Fahrenheit) empty from the stomach more efficiently than very cold or warm fluids and are more palatable, encouraging adequate intake. This temperature range is the ACSM-supported recommendation for exercise hydration in hot environments.

While carbohydrates support endurance performance, consuming 5-6 g/kg before a tennis match in heat is not the priority recommendation and could cause gastrointestinal issues.