Eating a diet rich in whole grains, fruits, vegetables and low-fat dairy products (such as the DASH diet) while cutting back on foods that are high in saturated fat and cholesterol can significantly lower your blood pressure. One way to stick to a healthy diet is to write down everything you eat. Keeping a diary for even just a week can make people aware of their true eating habits.
There are other reasons you may want to spend more time in the great outdoors, though. A 2014 study found that when the skin is exposed to sunlight, a chemical reaction causes blood vessels to widen and blood pressure to drop. And in a 2010 study, people who spent time in nature—walking in the forest as opposed to in an urban environment—saw greater reductions in their blood pressure, pulse rate, and stress hormones.