Wrestlers are almost always in excellent physical condition, as they are required to perform difficult stunts and compete in long, demanding matches. They are dedicated athletes who spend a great deal of time training, exercising, and lifting weights. Wrestlers tirelessly practice and perfect moves outside the ring, so that they can execute them safely and believably during future matches. Wrestling federations create dramatic storylines to captivate audiences. A pro wrestler must be a convincing actor who is able to take on the role of a hero or a villain. He or she might be instructed to give intense, emotional interviews, promote upcoming matches, intimidate opponents, and fake injuries. Wrestlers who are the most popular with audiences are generally given more opportunities to compete and develop detailed storylines.