Swimming is one of the most popular forms of aerobic exercise, and it is an excellent activity for anyone who wishes to get fit and stay active. Swimming is the movement by humans or animals through water usually without artificial assistance. It is a healthy activity and very enjoyable. Swimming is an excellent form of exercise.
Swimming involves the overall muscle mass of the body than almost any other exercise and in swimming people get an upper body and lower body workout in addition, as with most aerobic exercise. Swimming is also believed to reduce stress. The density of the human body is approximately similar to that of water, therefore the body is supported by the water when swimming, and less stress is therefore placed on bones and joints since the buoyancy of the water protects the joints. Water exercise is good for people who are overweight. Swimming is also good for older people and pregnant women.
Specifically swimming and other forms of water exercise such as water aerobics offers remarkable cardiovascular benefits and are one of the few forms of exercise that workout the entire body. Swimming is primarily an aerobic exercise due to the relatively long exercise time requiring a constant supply of oxygen to the muscles, except the short sprints where the muscles work anaerobically. Particularly water aerobics put less stress on the knee and hip joints than running and many other forms of aerobic activities. If you put people in the water, they don’t experience the pounding and compression on their joints, so there are much more pain free than any other form of exercise.

BENEFITS OF SWIMMING
Swimming works all muscles and gives the same results as walking or running without adding stress to the knees, ankles, legs and the back.
Swimming strengthens the heart, which improves delivery of oxygen to muscles.
Swimming is good for rehabilitation after weight loss and relaxation.
Swimming is a low impact exercise that is even suitable for pregnant women.
Swimming can improve posture and develop a strong physique.
The near weightless feeling of being in water help strengthen shoulder and abdominal muscle.
It enhances effective flow of blood and reduces coagulation with fatty droplets (fat micelles) in the blood vessels, thereby eliminating embolism.
It improves the store of energy since it is stress free.
It has being proven that swimming reduces psychological imbalance.