What is the recommended treatment for an athlete who is dehydrated but conscious, cognizant, not demonstrating any type of gastrointestinal upset, and not at risk for hyponatremia?

Oral fluids.

Explanation:

Dehydration may be defined as the loss of ions from the body. The dehydration may occur due to any bacterial infection or change in the body's physiology.

To recover from the dehydration different strategies and medication are given to the patient depending on the severity of dehydration. The athlete that has simple dehydration cab easily recovered from dehydration by the oral fluids intake. The oral fluids provide proper electrolyte in the body.

Thus, the answer is oral fluids.