IntroductionIn recent years, exercise has attracted more and more attention. Regular exercise can not only allow people to stay healthy but also do good for their muscles. Composed of muscle tissue, muscles play an important role in bodily functions. Muscles can be divided into three types: skeletal muscle, smooth muscle and cardiac muscle. Smooth muscle and cardiac muscle are involuntary and do not contract according to the will of humans. Skeletal muscles are voluntary and represent approximately 40% of total body weight. Muscles are essential for maintaining normal physiological functions because they can produce movement, maintain posture, stabilize joints and generate heat. The purpose of this report is to study the effect of exercise on muscles. I will discuss the effect on mitochondria, muscle fibers, capillaries and other aspects. Changes in the elements of the musclesIf muscle activities last a long time, the muscles will contract less effectively and muscle fatigue will occur due to lack of oxygen. Overall, exercise can lead to stronger, more flexible muscles with greater resistance to fatigue. Long-term exercise can change elements of muscle tissue. For example, it increases the amount of muscle glycogen, muscle myosin and muscle hemoglobin. The increase in these elements can improve the activity of the ATP enzyme and enhance the ability of muscles to contract. In the mitochondria, glucose is broken down into carbon dioxide and water. In this process, energy is generated that can be used to attach a phosphate molecule to ADP to produce ATP. However, if there is not enough oxygen, lactic acid will be produced which can cause muscle fatigue. If the activity of the ATP enzyme is improvised... middle of paper... to do medium and low intensity exercises such as brisk walking and jogging. Conclusion Muscles play an indispensable role in normal physiological functions. Without muscles, people are unable to play football, run and swim. Muscles allow people to exercise, and exercise can have a positive effect on muscles in return. The report aims to study the effect of exercise on muscles. Exercise can change elements of muscles such as muscle glycogen, muscle myosin and muscle hemoglobin. Additionally, exercising can increase the amount of mitochondria that can provide energy to your muscles. Additionally, exercise can lead to improvements in the cardiovascular and respiratory systems and capillary network. It can also increase the volume of muscle cells and make muscles stronger. However, it is important to choose appropriate activities and exercise intensities.