Sport can be performed on an amateur basis, professional or semi-professional, as the participants are invited to attend (usually by paying a salary). participation in amateur sport at a lower level is often called “grassroots sport”.
The popularity of the spectator sports recreation for the participants did not bring the sport to become an important business in itself, leading to a well-paid professional sports culture where the best participants of the show are rewarded with a good salary above about wage, those who it can amount to millions of dollars.
Some sports or individual competitions in a sport, maintain a policy of allowing amateur sport. The Olympics began with a principle of amateur competition with those who practiced a professional sport considered to have an unfair advantage over those who practiced only as a hobby. Since 1971, Olympic athletes were allowed to receive compensation and sponsorship, and since 1986, the IOC decided to make all professional athletes eligible for the Olympics, with the exception of boxing and wrestling.
Technology plays an important role in modern sports. With this being a necessary part of some sports (such as motor sports), it is used in other to improve performance. Some sports are also used to enable decision-over decision.
sports science is an academic discipline widespread and can be applied to areas such as the use of video analysis to refine the technique or equipment, such as sneakers or improved costumes competitive bathroom. The sports engineering has emerged as a discipline in 1998 with increased focus not only on the design of materials, but also the use of technology in sports, analysis and important data in portable technology. In order to control the impact of technology on fair play, organs often have special rules imposed to control the impact of the technical advantage among participants. For example, in 2010, FINA has banned costumes full bath, non-textile, because they have improved the performance of the swimmers.
The rise of technology has also enabled many decisions in sports games to be taken or examined, outfield, with another official using instant replay to make decisions. In some sports, players can now challenge decisions by officials. In football, the technology brings to decide whether a ball has crossed the goal line or not. The technology is not mandatory, but it has been used during the 2014 World Cup in Brazil, the Women’s World Cup Canada 2015, the Premier League and Bundesliga 2013-2014 2015-16. In the NFL, an arbitrator may request the revision of the stand playback, or have a coach able to launch a challenge to review the game using replays. The final decision rests with the referee. Video referee (commonly known as the official match television or TMO) can also use replays to aid in decision making in rugby (league and union). In international cricket, an arbitrator may request the third referee’s decision, and the third arbitrator makes the final decision. Since 2008, one of the judges review decision system was introduced and used in tournaments organized by the ICC, and maybe even in other games. According to the host broadcaster, a number of different technologies are used in the examination of a referee or a player, between repetitions snapshots, Hawk-Eye, Hot Spot and Snickometer in real time. Hawk-Eye is also used in court to appeal against the referee’s decisions