Online Class Notes (Jesse)

Vocabulary

move it or lose it 

proper / suitable / reasonable
proper – the right way
suitable – the way that’s best for each situation / person
reasonable – the fair / acceptable way

3 and a half (years old)

civilian hospital
civilized

Excessive exercise is harmful

There is a saying goes ”Life lies in movement”. Proper exercise can strengthen our immunity. However, excessive exercise do harm to our joints, muscles, hearts, etc. Therefore, to establish a scientific and reasonable exercise concept is more important than exercise itself.

Firstly, excessive exercise leads to osteoproliferation and synovitis. Doctors suggest that proper exercise is helpful to prevent osteoproliferation since the nutrition of cartilago articularis comes from synovial fluid which can only enter by extrusion. When joints move, the pressure in articular cavity is increasing, accelerating the penetration of synovial fluid and slowing down the speed of articular cartilage degeneration so as to lessen or prevent osteoproliferation. However, in the case of excessive exercise, the penetrating fluid as a result from congestion and edema synovial membrane triggers swelling and pain. At the same time, since the effect of wear on the articular surface, it will no longer be smooth so that the joint structure is changed by osteoproliferation.

Secondly, high-intensity exercise lead to rhabdomyolysis. Scientist suggest that high-intensity exercise in a short time can accelerate blood circulation. Muscle ischemia is elicited when the speed of blood circulation exceeds muscle tolerance and cause rhabdomyolysis. It’s worth noting that serious local ischemia happened in a short time will induce irreversible damage to cells. Besides, excessive exercise also lead to renal failure by the contraction of renal blood vessels, obstruction of renal tubules, and the damage in tubular epithelial cells.

Thirdly, excessive exercise does harm to heart. Right atrium, right ventricle and cardiac muscle tissue under the inner membrane are the most easily damage location. Because of the disturbance of calcium ion, the activity of enzyme inside the mitochondria enhances, changing the permeability of mitochondria membrane and thus causing damage to cardiac muscle. It also indicates that cardiac ischemia reduce the supply of oxygen to the heart and influence its energy metabolism, which might put us in danger.

Since the body function differs from one another, the scientific and reasonable exercise plans for everybody are differential. If the acute fatigue phenomenons such as muscular pain and the soreness and weakness of waist and knees occurs and fail to be recovered until the next exercise, it’s time to reduce exercise or stop it. If the reaction ability drops and the sense of balance decreases after exercise and can not be recovered in time, it’s necessary to see a doctor promptly.

Excessive exercise is harmful

There is a saying which goes like ”Life lies in movement”. Proper exercise can strengthen our immunity. However, excessive exercise harms / does harm to / may damage / may cause wear and tear to our joints, muscles, heart, etc. Therefore, establishing a suitable, scientifically based exercise plan is cruicial before engaging in exercise.

Firstly, excessive exercise leads to osteoproliferation and synovitis. Doctors suggest that proper exercise may assist in the prevention of osteoproliferation since the nutrition supply of cartilago articularis comes from synovial fluid which can only enter by extrusion. When joints move, the pressure in the articular cavity is increasing, accelerating the penetration of synovial fluid and reducing the speed of articular cartilage degeneration so as to lessen or prevent osteoproliferation. However, in the case of excessive exercise, the penetrating fluid, resulting from congestion and edema synovial membrane, triggers swelling and pain. At the same time, once the articular surface is compromised, it will no longer be smooth, and in turn the joint structure will be altered through osteoproliferation.

Secondly, high-intensity exercise leads to rhabdomyolysis. Scientists suggest that high-intensity exercise over a short period can accelerate blood circulation / cardiovasular circulation. Muscle ischemia occurs when the speed of blood circulation exceeds muscle tolerance, and causes rhabdomyolysis. It’s worth noting that serious local ischemia happened in a short time will induce irreversible damage to cells. Besides, excessive exercise also lead to renal failure by the contraction of renal blood vessels, obstruction of renal tubules, and the damage in tubular epithelial cells.

  Thirdly, excessive exercise does harm to heart. Right atrium, right ventricle and cardiac muscle tissue under the inner membrane are the most easily damage location. Because of the disturbance of calcium ion, the activity of enzyme inside the mitochondria enhances, changing the permeability of mitochondria membrane and thus causing damage to cardiac muscle. It also indicates that cardiac ischemia reduce the supply of oxygen to the heart and influence its energy metabolism, which might put us in danger.

  Since the body function differs from one another, the scientific and reasonable exercise plans for everybody are differential. If the acute fatigue phenomenons such as muscular pain and the soreness and weakness of waist and knees occurs and fail to be recovered until the next exercise, it’s time to reduce exercise or stop it. If the reaction ability drops and the sense of balance decreases after exercise and can not be recovered in time, it’s necessary to see a doctor promptly.