When swimming and fitness, you should be prepared for sun protection. It is best to apply some oily sunscreen to prevent the sunscreen from being washed away by water for a long time. Of course, you still need to reapply sunscreen in two or three hours. It is recommended to use waterproof sunscreen with SPF above 30 to protect the skin. To ensure the effect, apply it at least once every half hour. Because ultraviolet light reflected in water can cross more than one meter of water depth. Because water reflects sunlight, the radiation intensity will increase, and the ultraviolet radiation received by people in water will double.
In addition, wear a swimming cap to protect your hair after applying sunscreen. In hot summer, strong external irradiation will make keratin in hair lose a lot of water. Wearing a swimming cap is the most direct and effective method. Without swimming cap, you can directly apply disposable hair care essence with sunscreen function to your hair. This way, you can better protect yourself from the sun when swimming.
In hot summer, the strongest outdoor sunshine is from 10 to 3 pm. The best time for swimming and fitness is after 1 pm. If you are particularly afraid of tanning but like swimming, it is recommended to swim in the indoor swimming pool. Choose the right time to go swimming. At the same time, don't think that you don't need sun protection on cloudy days. On cloudy days, sunlight also has ultraviolet rays, which will become very strong after being reflected by water. Therefore, swimming on cloudy days still needs sun protection.