Sports are the most popular spectator activities, enjoyed by people from all walks of life and all age groups, both children and adults. Sports are generally governed by some group of unwritten rules or traditions, which ensure fair play, and enable consistent adjudication of the result. In popular sports, records of past performance are often maintained, and this information can be widely reported or announced in local sport newspapers or in sports news. Some sports like cricket have gone beyond simple status reporting and have become part of the social media and developed their own websites. Many athletes have their own websites where fans and competitors can interact on a common platform.
A wide variety of sports can be broadly classified as physical activity involving physical exertion. This could also include sport involving intellectual activity or a combination of the two. Physical activity is normally competitive, although it can include non-competition physical activity. For example, dancing is considered an extracurricular activity, rather than a competitive one. Extreme sports involve very high levels of exertion, such as skydiving, triathlons, skydiving with equipment, or mountain climbing. The extreme sports world often encompasses dangerous sports and high injury risk.
Sportive mental activities incorporate mental aspects of sport, such as concentration, focus, and alertness. Some examples of sports with a strong mental aspect include chess, bingo, poker, blackjack, and baccarat. Professional sportive sports people often hold office jobs, so there are plenty of opportunities for social interaction in sports like football, rugby, ice hockey, basketball, swimming, bowling, hockey, tennis, and golf. Most professional sports have a training and development programme that teach skills and techniques that can be transferred to everyday use. Other recreational physical activities can include cycling, walking, kayaking, horse riding, tennis, golf, swimming, hiking, aerobics, surfing, or weightlifting.