Bicycle helmet

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A bicycle helmet is a helmet intended to be worn while riding a bicycle. They are designed to attenuate impacts to the cranium of a cyclist in falls while minimizing side effects such as interference with peripheral vision. There is intense academic debate on whether helmet use offers any reduction of the chance of head injury. The debate on whether helmet use should be compulsory is even more intense and occasionally bitter, often based not only on differing interpretations of the academic literature, but also on differing assumptions and interests on the two sides.

A cycle helmet should be light in weight and should provide adequate ventilation, because cycling can be an intense aerobic activity which significantly raises body temperature and the head in particular needs to be able to regulate its temperature.