Question

athletes wear specially designed shoes with Spikes on soles why

Answer 1

The studs can dig into the ground and offer a much larger frictional force than the simple shoes while on grass. In short you can also say, Stud shoes increases friction and enables the player fast running quality. These shoes give a grip on the ground , improving the running speed of the players.

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Answer 2

athletes wear specially designed shoes with Spikes on soles to increase friction between their feet and ground and also the Spikes piece into the soft ground which is usually used for sports and does prevent them from slipping over
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