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Stride length is reduced, so to achieve competitive speeds, racewalkers must attain cadence rates comparable to those achieved by Olympic 800-meter runners, [32] and they must do so for hours at a time since the Olympic events are the 20 km (12 mi) race walk (men and women) and 50 km (31 mi) race walk (men only), and 50-mile (80 km) events are ...
Although running can seem like a very cheap activity that anyone can partake in, there are some expenses. Replacing running shoes every 400–500 miles (650–800 km) costs money. [14] [It was 300 to 400 miles earlier in the article.] Also, road race entry fees can be expensive because they have to cover the costs incurred by the race organizer ...
This was the last water before crossing about 45 miles (72 km) of desert consisting of soft dry soil that rose in suffocating clouds [72] before reaching the next water at the Green River about 4 miles (6.4 km) below the present town of La Barge, Wyoming. Here, the Green cut a steep 400 feet (120 m) channel through the Green River Desert, which ...
Once his reaction time of 0.146 seconds is subtracted, his time is 9.434 seconds, or 10.6 m/s, 38.16 km/h, or 23.71 mph. [143] Bolt's top speed, based on his split time of 1.61 seconds for the 20 metres from the 60- to 80-metre marks (made during the 9.58 WR at 100 m), is 12.42 m/s, 44.72 km/h, or 27.79 mph. [337] He also has the second fastest ...
The city encompasses 142.71 square miles (369.62 km 2), of which 134.18 square miles (347.52 km 2) is land and 8.53 square miles (22.09 km 2), or 6%, is water. [79] Natural bodies of water include the Delaware and Schuylkill rivers, lakes in Franklin Delano Roosevelt Park , and Cobbs , Wissahickon , and Pennypack creeks.
Endurance riding, a competition usually of 50 to 100 miles (160 km) or more, over mountainous or other natural terrain, with scheduled stops to take the horses' vital signs, check soundness and verify that the horse is fit to continue. The first horse to finish and be confirmed by the veterinarian as fit to continue is the winner.
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