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The 10,000 metres race walk is a racewalking event. The event is competed as a track race. Athletes must always keep in contact with the ground and the supporting leg must remain straight until the raised leg passes it. 10,000 meters is 6.21 miles.
kilometre (km) or kilometer is a metric unit used, outside the US, to measure the length of a journey; the international statute mile (mi) is used in the US; 1 mi = 1.609344 km; nautical mile is rarely used to derive units of transportation quantity.
On February 14, 1995, Mikhail Shchennikov of Russia set the 5,000 m race walk world indoor record in Moscow in a time of 18:07.08. The faster all-time men's best outdoor mark is held by Hatem Ghoula of Tunisia, at 18:05.49. The all-time women's best 5,000 m race-walk mark was set outdoor and is held by Eleonora Giorgi of Italy, at 20:01.80.
The 20,000 metres race walk is a racewalking event. The event is competed as a track race. Athletes must always keep in contact with the ground and the supporting leg must remain straight until the raised leg passes it. 20,000 metres is 12.4274 miles.
It can be held on a road course or on a running track. Also referred to as a 10-miler or 10 miles run, it is a relatively common distance in countries that use the mile as a unit of measure. Ten miles is roughly an intermediate distance between the 10K run and the half marathon (21.1 km). The level of endurance required to run the distance ...
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In addition, there are many mountain bike races of 100 miles (160 km). Fewer mountain bike races are longer than 100 miles (160 km) because the average speed on typical mountain biking terrain is much slower than that on the road.
SI, and hence the use of "km/h" (or "km h −1 " or "km·h −1 ") has now been adopted around the world in many areas related to health and safety [36] and in metrology [37] in addition to the SI unit metres per second ("m/s", "m s −1 " or "m·s −1 "). SI is also the preferred system of measure in academia and in education.