CSSD Sports Nutrition Planning & Performance Optimization 4

Question 1

Creatine monohydrate supplementation most directly enhances performance in which type of exercise?

Accepted Answer

Repeated high-intensity short-duration bouts with brief recovery periods

Answer

Creatine supplementation increases phosphocreatine availability, most benefiting repeated high-intensity, short-duration activities by accelerating ATP resynthesis between bouts.

Question 2

An athlete completing a 2-hour run loses 1.5 kg of body weight. Assuming losses are primarily sweat, approximately how much fluid should be consumed to achieve full rehydration?

Accepted Answer

2.0-2.3 L

Answer

Rehydration guidelines recommend consuming 1.25-1.5 times the fluid lost; 1.5 kg loss × 1.5 = approximately 2.0-2.3 L to account for ongoing urinary losses.

Question 3

Which micronutrient deficiency is most commonly associated with impaired oxygen transport and reduced endurance performance in female athletes?

Accepted Answer

Iron

Answer

Iron deficiency (with or without anemia) impairs hemoglobin synthesis and oxygen-carrying capacity, directly reducing aerobic endurance performance.

Question 4

A sports dietitian recommends sodium bicarbonate to a competitive swimmer before a 200m race. What is the primary mechanism of action?

Accepted Answer

Buffering extracellular acidosis to delay fatigue

Answer

Sodium bicarbonate acts as an extracellular buffer, increasing blood pH and facilitating efflux of hydrogen ions from muscle, thereby delaying fatigue during high-intensity exercise.

Question 5

During a 4-hour ultramarathon in the heat, which electrolyte loss is most likely to contribute to hyponatremia if the athlete consumes large volumes of plain water?

Accepted Answer

Sodium

Answer

Hyponatremia during prolonged exercise results from excessive sweat sodium losses combined with over-consumption of hypotonic fluids, diluting serum sodium below 135 mEq/L.

(CSSD) Board Certified Specialist in Sports Dietetics Practice Test

(CSSD) Board Certified Specialist in Sports Dietetics Practice Test

CSSD Sports Nutrition Planning & Performance Optimization 4