Walking

Walking like swimming, bicycling and running is a good exercise. It builds the capacity of energy output and physical endurance by increasing the supply of oxygen to skin and muscles, such exercise may be a primary factor in the prevention of heart and cirucula tory disease.
Walking is the least strenuous and safest exercise. A great number of people indulge in the exercise. Walking at comfortable speed improves the efficiency of heart and lungs.
There is evidence that walking may actually open up narrowed areas in the coronary blood vessels. This lessens chance of a heart attack. Walking also offers added help by decreasing the abnormally high levels of carbon monoxide and nicotine in the blood.
The less active you are, the faster the ageing process accelerates, and more vulnerable you become to physical and psychological problems.Walking eliminates this.