Summarize (paraphrase) the following paragraph:
Of the more than 1000 bicycling deaths each year, three-fourths are caused by head injuries. Half of those killed are school-age children. One study concluded that wearing a bike helmet can reduce the risk of head injury by 85 percent. In an accident, a bike helmet absorbs the shock and cushions the head. From “Bike Helmets: Unused Lifesavers,” Consumer Reports (May 1990): 348.