Steroids can decrease an athlete's ability to perform by causing injuries that are difficult to recover from. This happens because steroids don't foster overall development. Which of the following DO steroids strengthen?

Anabolic steroids are composed of synthetic variants of the hormone testosterone and is used to build muscles. These steroids can be used to treat conditions resulting from a steroid hormone deficiency and diseases such as AIDS. Some athletes and body builders use this type of steroid to increase muscle mass and aid athletic performance