Arteries are naturally flexible and smooth, which allows blood to easily move throughout the body. High blood pressure creates extra force against the artery walls, which damages the lining of the arteries. As they become narrower and harder, this restricts blood flow, and when blood flow is lowered, the heart has to work harder to pump it through the body, which only makes the problem worse.
Several Indian studies over the last few years have shown that Arjuna, in animals and in humans, reduces total cholesterol and increases HDL (“good” cholesterol). One study showed that this herb was as effective an antioxidant as vitamin E and that it reduced cholesterol in the human subjects quite substantially. Considering its benefit for cholesterol, it is not surprising that it lowers blood pressure; many cases of high blood pressure in the United States are caused by cholesterol accumulation in the arteries.
To calculate your target training heart rate, you need to know your resting heart rate. Resting heart rate is the number of times your heart beats per minute when it's at rest. The best time to find your resting heart rate is in the morning after a good night's sleep and before you get out of bed. Typically, an adult’s resting heart rate is 60-100 beats per minute. However, for people who are physically fit, it's generally lower. Also, resting heart rate usually rises with age.