EFFECT OF SUN EXPOSURE ON BLOOD PRESSURE IN HUMAN SUBJECTSMukesh Kumar, Satish Prakash AND Rupesh TiwariAbstract The paper presents results of experimental studies dealing with the effect of sun exposure on blood pressure in human subjects outdoors. The field experiments were carried out in the month of April, May and June 2006 in Meerut District. Detailed history about age, height weight work, exercise, alcohol consumption, smoking and duration of exposure to sunlight in 221 volunteer subjects (age-20-40 yrs.) were taken. Subjects were classified into eight groups according to the duration of exposure to sunlight. Systolic (BPS) and Diastolic (BPD) Blood pressure were recorded in all groups using mercury manometer. Decrease in blood pressure was statistically significant (p<0.05) and positively co related (r ho = 0.78) with the number of hrs exposed to sunlight. The most obvious conclusion of this study is that sunlight exposure greater than 3 hrs/ day is a major factor in the prevention of Hypertension particularly for dark skinned people. The optimum exposure for prevention of Hypertension is 7-hrs/per day. It seems that mechanisms that play role in blood pressure control during sun exposure are intensive sweating, metabolism of cholesterol and decreased level of stress.
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