Explain why not everyone can become a bodybuilder, even if they train hard enough.

Answer:

While weight training will improve muscle strength and mass, the potential of a body to develop muscle is limited in part by genetic factors that are out of an individual's control. Other health and fitness conditions may also limit a person's ability to build sufficient muscle to qualify as a bodybuilder. As a result, not everyone can become a bodybuilder, even with sufficient training.