NCSF Sport Nutrition Specialist Certification (SNS) Practice Test

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What is the classification of sodium bicarbonate in terms of dietary supplements?

  1. Energy booster

  2. Buffering agent

  3. Protein supplement

  4. Carbohydrate source

The correct answer is: Buffering agent

Sodium bicarbonate is classified as a buffering agent due to its ability to help maintain pH levels in the body, especially during high-intensity exercise. When lactic acid accumulates in the muscles, it can lead to a drop in pH, contributing to fatigue. By alkalinizing the blood, sodium bicarbonate helps to neutralize acid in the muscles and blood, thereby potentially enhancing performance and delaying the onset of fatigue during anaerobic activities. This function contrasts significantly with other classifications. For instance, energy boosters are typically substances that provide a quick source of energy, such as carbohydrates or stimulants, which does not align with the role of sodium bicarbonate. Protein supplements, on the other hand, are used primarily for muscle repair and growth, focusing on supplying amino acids, again differing from the buffering action of sodium bicarbonate. Similarly, a carbohydrate source provides readily available energy, a function that sodium bicarbonate does not serve in the context of performance enhancement. Thus, recognizing sodium bicarbonate as a buffering agent highlights its important role in improving athletic performance through pH regulation, distinguishing it from more direct energy or structural nutritional supplements.