The issue of vitamin D
However, studies carried out in various parts of the world have shown that many sportsmen and women suffer from a lack of vitamin D. The consequences are manifold, here we cite the most significant: decrease in muscle strength, inability to sustain intense training, joint pain and increased incidence of stress fractures.
The sun as a source of vitamin D
Last but not least: the sunscreen
Today's creams are very different from the ancestors of the 30s, today the identity of the effective cream is: fragrance-free, in large packaging and with clearly legible labels. They must contain latest generation filters with high stability (mexoryl, tinosorb, uvinul). Possibly in large packages because, to be really effective, the sun creams must be spread evenly throughout the body in abundant measure continuously renewing the application during the day. According to experts, the right amount is 40 grams of product for every hour of exposure to the sun.
Protecting oneself from the harmful effects of radiation does not preclude the production of Vitamin D.
Finally, a very important precaution on the conservation of these products: the sun and sand alter the properties of sun creams, which is why it is good not to use the creams of the previous year. If optimally stored, sunscreen products last for 12 months from the date of opening (period after opening shown on the labels). But considering we keep them on the beach, they can lose effectiveness in even less time.
A solar swimming pool must be photo stable, water resistant and chemically inert, a rare feature in commercial products. What does this last point mean? Many sun filters are decomposed by chlorine in the water and lose their ability to absorb UV-B and UV-A rays. In addition, sun protection is reduced with frequent baths: The so-called water-resistant solar baths are tested to withstand about 4 20-minute dives. The clutch of the towel also helps to remove the sun. The recommendation is therefore to take a shower after swimming in the pool and reapply the protection on the skin.
Dry in the sun. It is one of the most effective remedies because the sun's rays counteract the effects of chlorine and are also a way to "refresh" your tan.
Use waterproof solar. These products do not dissolve in water and allow to create a protective layer on the skin against chlorine.
Take a shower. At the end of the day in the pool it is better to prefer a quick shower with not too hot water. Too much immersion in water accelerates the detachment of dead cells that carry away your tan. Moreover, it is advisable to use neutral detergents to avoid damaging the epidermis and, at the end, dry gently and dab with a towel.
Always be hydrated. To avoid losing your tan, your skin should always be hydrated. Spread creams and moisturizing oils several times a day, but also take care of your diet by drinking plenty of water and favouring foods such as fruits and vegetables that contain a lot of liquids.