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Training methods that add resistance to a sprint embody sporting a weighted belt, towing a parachute, and towing a weighted sled [4–7]. Sled towing exerts a horizontal drive on the athlete and is very effective in enhancing acceleration performance [4, 5, eight, 9]. In a sled-towing train, the athlete is connected to the sled by way of a chest or waist harness, and a sequence of sprints are performed with a particular weight added to the sled [4, 10]. The coaching stimulus relies upon primarily on the weight of the sled and the coefficient of sliding friction. The coefficient of friction should be thought-about as a end result of it influences the magnitude of horizontal frictional drive between the sled and the operating floor [11].
When many vehicles are to be transported, somewhat than...