What type of substance is commonly used to enhance athletic performance?

Anabolic steroids are commonly used to enhance athletic performance because they are synthetic derivatives of testosterone. These substances are known for facilitating muscle growth, increasing strength, and improving overall physical performance. Athletes often use anabolic steroids to gain a competitive edge, leading to enhanced training capabilities and recovery times.

In contrast, depressants typically slow down the body's functions and can impair physical performance. Stimulants may temporarily increase energy and focus, but they are not specifically designed for muscle building like anabolic steroids. Narcotics primarily serve pain relief purposes and can hinder athletic performance due to their sedative effects. Therefore, anabolic steroids are the most relevant and effective choice for individuals seeking to enhance their athletic capabilities.