What is an indication of steroid use in fitness and wellness?

An increase in muscle size is a well-known indication of steroid use in fitness and wellness. Steroids, specifically anabolic steroids, are synthetic variations of testosterone, which is a hormone that promotes muscle growth and strength. When individuals use these substances, they often experience rapid gains in muscle mass and size beyond what can typically be achieved through natural training and nutrition alone. This substantial change is one of the primary reasons athletes and bodybuilders may misuse steroids, as it can enhance their physical appearance and performance in their respective sports or activities.

The other options do not indicate steroid use in the same way. Decreased stamina is generally more associated with fatigue or overtraining rather than the physiological effects of anabolic steroids. A higher body fat percentage can indicate a variety of lifestyle factors and is not directly correlated with steroid use; in fact, many steroids can lead to a more muscular appearance with possibly reduced body fat. Improved flexibility does not relate to steroid use, as steroids are more often associated with muscle growth rather than enhanced flexibility. Therefore, the increase in muscle size stands out as the most relevant and observable indicator of steroid use in fitness and wellness.