Why is it easy to get a tan when swimming outdoors in the summer?

Because the ultraviolet rays outdoors are particularly strong in summer, when swimming**, you will be directly exposed to ultraviolet rays, and it is easy to get tanned.

Swimming outdoors in the summer is easy to get a tan, because after swimming, a layer of chemicals in the pool will adhere to the body, and it is easy to react with the sun's rays when exposed to the sun.

Because when swimming outdoors, it leads to **exposure, and sunlight contains ultraviolet rays, which act on the surface of the **, excite** keratinocytes, make blood vessels dilate, increase blood flow, and will be red at the beginning, and then slowly turn brown, that is, the saying black.

That's because in summer, the ultraviolet rays are particularly strong, which is easy to darken and even sunburn.

Because in water, the surface of the water reflects the sun's rays, making ** receive a greater dose of ultraviolet rays, so it is more likely to get tanned.

Swimming at the beach is easier to tan, because the sea water will absorb a lot of ultraviolet rays during the day, and it will be released when it is dark.

In addition, swimming is of course also considered to be exercise, exercise will cause the body to secrete a substance called phenol nitrosamine, which is a kind of melanin.

The sun's strongest ultraviolet rays (which can cause the most damage) are between 10 a.m. and 3 p.m. It is best to choose the swimming time after 4 p.m., especially if you work indoors with less sun exposure and are more prone to sunburn.

Tips to prevent swimming from going black:

1. Choose PA+++ for sunscreens

PA+++ means that it can delay the tanning time of the skin by about 8 times, and the sun protection time is long, which is suitable for long-term outdoor use. Under sunlight, the amount of ** UV absorption in the water will be doubled, and it is best to choose SPF30, PA++ sunscreen.

2. Sunscreen is more needed for swimming on cloudy days.

There are also ultraviolet rays in the sun on cloudy days, which is not something you can't see, and it will become very strong after the reflection of water, and the skin will still be sunburned, so as long as the skin is exposed to the sun, you must protect yourself from the sun.

3. Wipe dry immediately after swimming.

Quickly dry your body after swimming to reduce the reflection of water, and the reflection of water droplets left on the body in contact with the sun will also occur, and the chance of UV damage to the skin is also enhanced!

Here's why:

Because in summer, ultraviolet rays are already stronger;

It is because in the water, the surface of the water will reflect the sun's rays, making ** receive a greater dose of ultraviolet rays, so it is easier to be tanned.

After contact with water, human ** will slowly start chemical synthesis to produce an organic compound that strongly absorbs ultraviolet rays, and the American Stidi temporarily named it Sartart Shine, which means something that strongly absorbs ultraviolet rays. So, when swimming, people are more likely to get tanned.

Ways to get a tan for swimming in summer:

1. You can buy that kind of sunscreen swimsuit (like the kind of water that only shows your hands, feet and head).

2. When swimming ashore, you can choose to rest in a cool place, or use a bath towel to protect your shoulders**.

3. After playing, you should immediately wipe off the water on your body, because the ** that is wet with water is sensitive to sunlight.

4. Apply some skin care oil or sunscreen whitening lotion to the exposed **Naga.

In summer, the sun shines directly near the Tropic of Cancer, and the northern hemisphere is a little more exposed to the sun's light, resulting in strong ultraviolet rays in summer, and the reflected light of water is n times that of land, so it is not dark at the beach for ten days outside.

This is the reason for the strong ultraviolet rays, and the other is direct exposure to strong light. Be careful not to avoid it in an open-air swimming pool;

After swimming during the day, or after a day in the sun, the exposed **will be darker than the covered**, and it will be obvious. This is because the melanin in the base layer is strange, and when the sun shines, it stimulates and activates the melanin, and it becomes darker and darker.

In fact, melanin is also good, that is, it has the effect of protecting the body against ultraviolet rays, people with light skin will be red and have been burned after being sunned for a long time, but people with dark skin will not. Because people with dark skin tones** have melanin, which can prevent ultraviolet damage. If it is **white,** there is a lack of melanin, under the sun's irradiation, in order to protect**, the melanin will be intensified, so after you tan, don't blame the black **, that is to protect you.

Everyone knows that basking in the sun will turn black, especially when you are swimming in the water, the sun's ultraviolet light is refracted through the water, and the ultraviolet light becomes stronger, making it easier to tan in the water.

After swimming, the sun turns black because the body is directly exposed to the sun, and the dew on the body at this time will gather sunlight, so it will turn black.

Swimming is the skill of floating on the water and moving forward in the water with the movement of one's own limbs and body. Competitive swimming is the second largest sport in the Olympic Games, including butterfly, backstroke (also known as back stroke), breaststroke and jet stroke (also known as crawling freestyle) four swimming style races, as well as synchronized swimming.