Staying physically active is very much essential in order to lead a healthy life. Any sport, physical activity or exercise plays an important role in keeping ourselves fit. It is always interesting to think about what happens to our body while we exercise or sport. Physical activity has lots of beneficial effects.
Blood flow pattern changes when a person goes from resting to exercising. The body starts to use many different muscles to generate the necessary motion. This means energy production must increase to cope with the changes in activities. The body starts to call upon those stuff stored in its reserve namely glucose, ATP (adenosine triphosphate). ATP is the high-energy phosphate molecule that allows for muscle contraction.
After the reserve gets empty, the body needs extra oxygen to create some more of ATP. More blood gets pumped to the muscles in action in order to deliver the additional oxygen. That is why our heart starts to beat faster and you tend to breathe heavier.
Triglycerides and LDL Cholesterols are fatty substances that travel through the blood to the cells. High LDL cholesterol (bad cholesterol) and triglyceride level would cause fats to build on the artery walls, raising the blood pressure and restricting blood flow. This leads to heart attacks. Exercise affects blood pressure by lowering the triglyceride levels and improving HDL cholesterol levels (good cholesterol) minimizing the risk of coronary attacks.
Minute tear also occurs in the muscles which help them grow bigger and stronger as they heal. The rate at which the body uses energy is called the metabolic rate. In response to exercise, many hormones are secreted at a higher rate while insulin is secreted at a lower rate.
The systems that get the benefits of physical activity are the cardiovascular, muscular-skeletal, metabolic, endocrine (system that releases hormones) and the immune system. However the benefits diminish within two weeks if the physical activity is discontinued. You may not need to exercise vigorously but getting up and moving around more would definitely do a lot of good to your health.