A new study shows that moderate sun exposure can help reduce high blood pressure , and hypertension is a risk factor for heart disease and stroke.
The study published in a recent issue of " Skin scientific journal " on that nitric oxide concentration in the sun can change the skin , blood vessels to dilate , thus achieving the blood pressure lowering effect . Due to the small portion of nitric oxide enters the circulatory system from the skin , dilation of blood vessels . If the blood pressure down , suffering from heart disease and reduce the risk of stroke will follow .
British researchers of the University of Southampton in southern 24 volunteers were tested , divided into two phases , the first phase, the researchers asked subjects received Tanning light irradiation , UV absorption and heat, lasted 20 minutes ; in Phase 2 , the researchers UV blocking , just let light emitted heat, the time is 20 minutes . The results showed that the absorption of ultraviolet rays to the subject a marked decrease in blood pressure .
The researchers said the study supports the " association between blood pressure and cardiovascular disease ," this theory. Studies have shown , the high incidence of cardiovascular disease will live with the seasons and different latitudes in winter and regional higher latitudes , the onset of cardiovascular disease, the higher the probability of ultraviolet rays and lower in those areas this season .
The researchers noted that , to avoid excessive sun exposure is the key to preventing skin cancer , but did not the sun, it will increase the risk of cardiovascular disease.