CSSD Practice Exam 2025 – Complete Study Resource

Beta-alanine's primary function is to increase muscle carnosine levels, which is essential for improving performance during high-intensity exercises. Carnosine acts as a buffer against acid accumulation in muscles, particularly during strenuous activities, allowing athletes to perform at peak levels for longer periods before fatigue sets in. By elevating carnosine concentrations in skeletal muscle, beta-alanine helps enhance exercise capacity and may improve overall workout performance.

The other options do not accurately reflect the mechanism of action related to beta-alanine. While increasing muscle glycogen storage is critical for endurance activities, that function is more closely associated with carbohydrates and insulin. The statement about reducing heart rate pertains more to various cardiovascular drugs rather than a direct action of beta-alanine, while inhibiting protein breakdown relates to other compounds, not the role of beta-alanine in muscle performance and fatigue management. Understanding these distinctions is vital for a comprehensive grasp of how different substances affect exercise performance and metabolism.