CSSD Hydration Strategies 2

Question 1

An endurance cyclist is training in 35°C heat for 3 hours. Which electrolyte replacement strategy is most appropriate?

Accepted Answer

Sodium-containing beverage (500–700 mg/L) consumed regularly

Answer

Sodium-containing fluids help replace sweat sodium losses, maintain plasma osmolality, and stimulate thirst during prolonged exercise in heat.

Question 2

Which urine specific gravity (USG) value best indicates adequate hydration before an athletic event?

Accepted Answer

1.001–1.020

Answer

A USG of 1.001–1.020 indicates euhydration, while values above 1.020 suggest significant dehydration.

Question 3

A football lineman sweats at a rate of 2.5 L/hr during two-a-day practices. What is the primary concern beyond fluid replacement?

Accepted Answer

Sodium and chloride losses leading to hyponatremia risk if overdrinking water

Answer

High-volume sweaters who replace losses with plain water risk dilutional hyponatremia; sodium replacement is critical.

Question 4

Which method is considered the gold standard for assessing sweat rate in athletes?

Accepted Answer

Pre- to post-exercise body weight change

Answer

Pre-to-post exercise nude body weight change (corrected for fluid intake and urine output) is the most practical and accurate field measure of sweat rate.

Question 5

An athlete competing in a 2-hour half-marathon in cool (15°C) conditions reports drinking 1.5 L every 30 minutes. What risk should the CSSD prioritize?

Accepted Answer

Exercise-associated hyponatremia (EAH)

Answer

Drinking in excess of sweat rate, especially with hypotonic fluids, dilutes serum sodium and can cause exercise-associated hyponatremia.

(CSSD) Board Certified Specialist in Sports Dietetics Practice Test

(CSSD) Board Certified Specialist in Sports Dietetics Practice Test

CSSD Hydration Strategies 2