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The effects of weather on sport are varied, with some events unable to take place while others are changed considerably. The performance of participants can be reduced or improved, and some sporting world records are invalid if set under certain weather conditions. While outdoor sports are most affected, those played indoors can still be impacted by adverse or advantageous weather conditions. ==Temperature== Temperature has a significant impact of the performance of athletes. High temperature can cause various heat illnesses such as heat cramps and heat stroke, while very low temperatures may lead to hypothermia. Some major sporting events cannot be held when the temperature is too high. When AFC selected Qatar as the host of the 2011 AFC Asian Cup they opted to run the event in the January window rather than July or August because they considered it to be "too hot in the Gulf region".〔(Qatar to host Asian Cup 2011 ). FIFA. 29 July 2007. Accessed 18 September 2011.〕 However, the 2022 FIFA World Cup, also set to be held in Qatar, is scheduled for the summer months (see ''2022 FIFA World Cup#Climate''). Training regimes may include methods of heat acclimatisation, and regulations in some sports stipulate the intensity of some schedules. The National Collegiate Athletic Association (NCAA) in North America requires teams to build up the level of training in hot weather. Such preparation intends to improve performance and reduce the potentially fatal risk of heat stroke.〔English, Marianne. (How football players can beat the heat ), Discovery News. 24 August 2011. Accessed 18 September 2011.〕 High temperatures also result in thinner air, which results in less drag on athletes in sports where air resistance plays a major role. Velodrome designers capitalise on this, heating the stadium in the hope of making the cycling faster, and ''The Daily Telegraph'' has reported that some Olympic Games organisers have pumped cold air into velodromes to give rival teams a disadvantage in close time trials.〔Pierce, Nick. (London 2012 Olympics: Cyclists aim to get up to speed in London velodrome dress rehearsal ). ''The Daily Telegraph''. 15 February 2012. Accessed 3 August 2012.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Effects of weather on sport」の詳細全文を読む スポンサード リンク
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