Regular stretching is an important part of a regular exercise program and should be done whenever you exercise. what are four benefits of stretching.

Regular stretching is an important part of a regular exercise program and should be done whenever you exercise because it will Improve your performance in physical activitie, Decrease your risk of injuries, Help your joints move through their full range of motion, and Enable your muscles to work most effectively.

Awould be the most dangerous

Smoking damages the respiratory system by inhalation of a foreign substance, that is absorbed and residue is left behind on our lungs sponge like substance. the gas that is inhaled also increase your blood pressure and dilates your blood vessels. also the process of inhaling and exhaling the smoke it causes irritation to the throat and mouth. smoking can cause lung cancer and other respiratory and circulatory diseases.