Adults taking part in outdoor winter sports should use sunscreen on cloudy days as well as clear days, a study suggests.
In a study of 3,937 skiers and snowboarders who reported on their use of sun protection, researchers investigated the association between adult sun protection behaviour and UV radiation at North American ski resorts between 2001 and 2003.
The results showed that subjects took more sun safety precautions on days when the sky was clear, although the researchers found that UV is highest around noon and at time points far from the winter solstice, in addition to clear days. During inclement weather, subjects tended to maintain body temperature but neglected sun safety.
Anderson PA, Buller DB, Walkosz BJ et al. Arch Dermatol 2010; 146: 1241-7