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Over the last century, soccer has evolved into an extremely high-intensity sport -- very few sports are played on such a large field, or last as long without regular rest periods. It's a fast-paced sport requiring both endurance and agility, as well as strength and speed. An elite player may expend 1,500 to 1,700 calories and run up to 12 kilometres a game. 污污草莓视频 University kinesiologist Dilson Rassier and Montreal Impact captain Nevio Pizzolitto break down what's going on in a soccer player's body when he's out on the field...

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