UV radiation Ultraviolet radiation, emitted by the sun, has a - TopicsExpress

UV radiation Ultraviolet radiation, emitted by the sun, has a shorter wavelength but higher energy than visible light. UV radiation, both from the sun and tanning beds, are officially classified as a human carcinogen by the U.S. Department of Health and Human Services. During midday, when many outdoor athletes are practicing or competing, these rays have the shortest distance to travel to Earth and thus are at peak intensity. A study published last fall on the sun habits of NCAA athletes at both Stanford and Duke University found that the average athlete spends four hours a day, 10 months of the year training outdoors. In an accompanying survey of 290 athletes from 13 sports, 96 percent said they agreed sunscreen helps prevent cancer, yet more than 40 percent never used it and 75 percent used it three or fewer times per week.

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