Sports psychology studies the role of psychological factors that can influence the sports, athletic performance, exercise, and physical activity. The sport psychologists help the sportsperson utilize psychology to improve their athletic performance and mental wellness. Different sub-areas have also emerged and require special attention, e.g. attentional focus which involves the ability to tune out distractions (such as screaming fans). Mental toughness that refers to the psychological characteristics are important for an athlete to reach the optimal performance. It also helps visualization and goal-setting. It can also be useful for helping athletes feel calmer and more focused before an event. Some sports psychologists work with professional athletes and coaches to improve performance by increasing, at both levels, extrinsic and intrinsic.