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Cross Country races vary in length and terrain. They are most often run at 5K, 6000 meters, 8000 meters, 10K, and 12,000 meters, though many races for children are shorter. During training season, professional runners can run anywhere from 40 to 120 miles each week, depending on preference, training method, and ability to remain healthy.
The idea of running economy is increasingly used to understand performance, as new technology can drastically lower running times over marathon distances, independently of physiology or even training. Factors affecting running economy include a runner’s biology, training regimens, equipment, and environment.
When George Simpson became the first person to run 9.4 seconds for the 100-yard dash in 1930, his record was disallowed because he used starting blocks. [ 3 ] Wood was the first material used, with some tracks having permanently-placed wooden starting blocks as built-in structures at the start line.
Sports footwear includes football boots (also referred to as cletes), trainers, riding boots, tennis shoes (or running shoes), or ice skates. Sportswear also includes sports bras for running, crop tops, or a bikini top. Sportswear is often worn as casual fashion clothing.
Sprint training includes various running workouts, targeting acceleration, speed development, speed endurance, special endurance, and tempo endurance. Additionally, athletes perform intense strength training workouts, as well as plyometric or jumping workouts.
Running shorts are designed to facilitate comfort and free movement during exercise. Their materials are lightweight and hard-wearing. Many running shorts include an inner lining that acts as underwear, so wearing separate underwear is not necessary. Polyester is a common fabric in running shorts and makes it comfortable. [citation needed]
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