The role of Vitamin D in common ailments

High blood pressure is known as the silent killer becuase of its the link to heart attacks and strokes. The causes of high blood pressure are: Mental stress: Stress can have a severe impact on blood pressure, especially when it is chronic. It can occur as a result of both socioeconomic and psychosocial factors. Some aspects of sex: In general, high blood pressure is more common among adult men than adult women. However, after the age of 55 years, a woman's relative risk of hypertension increases. A recent study compared the impact of medication and exercise for reducing high systolic blood pressure.  The researchers reviewed 197 exercise randomised control trials and 194 randomised control trials looking at medication. While anti-hypertensive medications achived hight reductions in blood pressure that exercise.  Researches concluded that modest but consistent reductions in systolic blood pressure can be achieved with exercise. Reference

The standard theory of heart disease states that fatty foods cause the arteries to "clog up" and narrow, which is a major feature of cardiovascular disease.  Researchers have discovered that a lack of sleep seem to have more to do with hardening of the arteries (atherosclerosis) than a fatty diet. Not getting enough sleep on a regular basis can cause a buildup of plaque in the arteries, which causes them to stiffen and eventually close. Researchers at Massachusetts General Hospital now think that hardening of arteries has more to do with a "neuro-immune axis" linking sleep to the cardiovascular system.  Sleep helps regulate the production of inflammatory cells and maintain healthy blood vessels, and so it would follow that lack of sleep has the reverse effect. The researchers demonstrated the effect on a group of laboratory mice.  Although the cholesteral levels of sleep deprived ice remained the same, they developed larger arterial plaques and had double the number of inflammatory cells known to contribute to hardening of arteries. Reference Tall AR, Jelic S. How broken sleep promotes cardiovascular disease. Nature. 2019 Feb;566(7744):329-330

In my previous post, I shared the evidence of how nature can restore you.  I appreciate that not everyone in London lives within easy access to a green space, and it turns out that it may not be necessary to visit the green space just look at a green space. This first occurred to me a few weeks ago, when I was in Manchester.  In the hotel reception they had screens playing a short video clip of a roaring log fire.  A roaring log fire just happens to be another of those things that I find both calms me, reduces my stress levels and restores me.  What I noticed is that I had a positive response to the video clip, even though it was just a film of a log fire rather than an actual log fire.  So this made me think, would just looking at a picture of nature on your PC have the same positive impact as going out in nature. Li & Sullivan in a randomised controlled experiment demonstrated that views to green landscapes promote attention restoration and help individuals to recover from stress.  In another study, researches in China, have discovered that viewing nature based scenes were restorative and those with more openness but no people were more lived to reduce stress.  So maybe you could just look at a picture instead. So for those of you where its not practical to spend 5 minutes in nature per day, why not look at a picture of a green landscape (without people) on your mobile phone  or tablet or pc, and see if it boosts your attention levels and restores you. References D Li and W C Sullivan, Impact of views to school landscapes on recovery from stress and mental fatigue.  Landscape and Urban Planning, vol 148, 2016, pp 149 - 158.