It's hot in dog days, and a lot of sweat will be lost in the process of drying your back, so the time of drying your back needs to be decided according to your physical fitness and endurance.
If it's the first time to bask in the back, it won't take too long, usually about 20 minutes. In the future, you can gradually increase the sunbathing time according to your ability, but it is generally not recommended to exceed 1 hour, so as not to cause great losses to your body.
When to sunbathe in dog days, it is best to sunbathe when ultraviolet rays are weak and the temperature is low.
The ultraviolet intensity is very strong in dog days, and it is very hot. Therefore, it is recommended to sunbathe when the ultraviolet rays are weak and the temperature is relatively low, such as 7-8 am and after 4 pm.
Otherwise, too strong ultraviolet rays will not only cause great irritation to the skin, but also cause sunburn such as redness, peeling and blackening. If the temperature is too high, it is easy to cause heatstroke.
Do you have to get a tan in the dog days? Not necessarily.
Ultraviolet rays in the sun can synthesize vitamin D after irradiating the skin, promote the absorption of calcium in the body, and also play a role in sterilization and disinfection. Therefore, in addition to the dog days, you can also properly sun your back at other times.
It's just that the dog days are the hottest time of the year. At this time, sunbathing can better nourish the yang in the body and promote the blood circulation of the body, and the effect is better.
It is enough to sunbathe your back several times a day in dog days.
Although supine sunbathing in dog days can play a certain health care role for human body, because the human body will lose more sweat in the process of supine sunbathing, if it is too many times, it will easily lead to symptoms such as insufficient body fluid, getting angry and quenching thirst, and even heatstroke and electrolyte imbalance in the body may occur in severe cases.
Therefore, generally speaking, it is recommended to sunbathe about 1 time every day, and the sunbathing time should not be too long, depending on the body feeling hot, slightly sweaty and comfortable.