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The 5K run is a long-distance road running competition over a distance of five kilometres (3.1069 miles). Also referred to as the 5K road race, 5 km, or simply 5K, it is the shortest of the most common road running distances. It is usually distinguished from the 5000 metres track running event by stating the distance in kilometres, rather than metres. Among road running events, the 5K distance is mostly popular with novice or infrequent runners or joggers, as it is comparatively easier to complete the distance without endurance training. This also makes the distance suitable for people looking to improve or maintain their general physical fitness, rather than develop long-distance running abilities. The brevity of the distance means that less time is required to take part in the activity and that people from a wide range of ages and abilities may participate. From a physiological perspective, five kilometres is towards the low end of endurance running.〔Wolfe-Bieler, Kristen (2007-06-08). (Run Your First 5-K ). ''Runner's World''. Retrieved on 2014-01-18.〕 The combination of the activity's simplicity, its low-cost, and medium exercise intensity mean that it is often recommended by medical organisations and healthcare professionals.〔( Beginner 5km programme ). BUPA. Retrieved on 2014-01-18.〕〔(5K Fun Run ). Diabetes.co.uk. Retrieved on 2014-01-18.〕〔(5K run: 7-week training schedule for beginners ). Mayo Clinic. Retrieved on 2014-01-18.〕 Like all physical activity, regular 5K runs can improve cardiovascular function and reduce body fat, as well as having mental health benefits (see runner's high).〔(running with Couch to 5K ). National Health Service. Retrieved on 2014-01-18.〕 ==Events== Similar to other road running events, many organised 5K running events incorporate an element of charity running.〔 Runners may elect to raise money for a chosen charity on the condition of their completion of the race.〔(Race for Life ). Cancer Research UK. Retrieved on 2014-01-18.〕 This is typically optional, with other participants running for pleasure. The 5K distance is particularly popular among women and a number of annual women-only races are organised over this distance. Running USA's 2012 analysis of participation in American road races showed that 58% of participants in 5K races were women. This contrasts with women's participation in sport in general and in longer distance races particularly, where the same report showed the gender bias was reversed.〔(Statistics ). Running USA (2012). Retrieved on 2014-01-18.〕〔(2012 State of the Sport Part I: Growth of Women's Running ). Running USA (2012-05-09). Retrieved on 2014-01-18.〕 The Hot Chocolate 5K in Chicago and the Mercedes-Benz Corporate Run in Miami are the largest organised 5K runs in the United States, having attracted over 20,000 and over 16,000 runners, respectively, in 2012. This ranked the Hot Chocolate 5K as the 20th largest road running event of any distance in the United States that year.〔(Largest Races ). Running USA. Retrieved on 2014-01-18.〕 There are several prominent 5K race series, including The Color Run, an international, mass participation, city-based series involving coloured water showers,〔(About ). The Color Run. Retrieved on 2014-01-18.〕 and the parkrun series, which is an umbrella grouping of free-to-enter, volunteer-led races recurring each weekend (principally in the United Kingdom).〔Philips, Mitch (2010-05-21). (Grass-roots support pushes Parkrun to new heights ). Reuters. Retrieved on 2014-01-18.〕 Unlike longer road races, such as the 10K run and marathon, the 5K distance is not commonly contested by elite distance runners. The Carlsbad 5000 is one of the few races that attract competitive elite fields and has seen several world bests for the distance (the IAAF does not recognise world record for the 5K road event).〔(Defar runs fastest ever women's 5km in Carlsbad ). IAAF (2006-04-10). Retrieved on 2014-01-18.〕〔(Third win in a row for Gebremeskel, Burka makes Ethiopian double in Carlsbad ). IAAF (2013-04-08). Retrieved on 2014-01-18.〕 Another annual American race, Freihofer's Run for Women, also regularly has elite women competing in the road distance,〔(Chebet beats the heat to set course record in Albany 5K ). IAAF (2010-06-06). Retrieved on 2014-01-18.〕 as does the BOClassic in Italy.〔Sampaolo, Diego (2012-01-01). (Soi and Cheruiyot take thrillers in Bolzano ). IAAF. Retrieved on 2012-01-02.〕 Elite racing almost exclusively takes place on the track for this distance. There is no official world championship event organised for the 5 km road distance. Championships over 5 km are held nationally in some areas, including the United States and England.〔(Records, Rankings, and Lists ). USA Track and Field. Retrieved on 2014-01-18.〕〔(English 5k Road Championship ). England Athletics (2010-07-12). Retrieved on 2014-01-18.〕 An annual North American 5K Championships was created in 2002, but this competition ceased after 2005.〔(North AMerican 5 Kilometres Championships ). GBR Athletics. Retrieved on 2014-01-18.〕〔(2005 North American 5 km Team Challenge ). USATF. Retrieved on 2014-01-18.〕 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「5K run」の詳細全文を読む スポンサード リンク
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