The question of whether running hurts the knee needs to vary from person to person. I have seen a marathon once or twice a week, and I have never had a knee accident. I saw that my knee began to hurt for two weeks before I started to lose weight.
On the one hand, the knee joint is extremely complicated, the blood circulation is extremely bad, and it is difficult to repair after injury; On the other hand, its natural structure (ligaments in all directions, strong quadriceps femoris, locking mechanism, etc. ) it has excellent stability, and the meniscus buffer device will not concentrate pressure, so the knee is not so fragile.
When walking, the weight of our knees is about 3 times of our body weight, and it will increase to 7-8 times when running. If it is 70 kilograms, the pressure is still great, and there are 490 kilograms! !
Actually, the human body is very powerful. Running is the basic ability of human beings. Imagine that in ancient times, human beings lived in running. On the contrary, the development of science and technology makes our physical strength less confident and powerful. In fact, our bodies are very powerful and magical, and there are many places to develop.
On the contrary, regular pressure stimulation can also stimulate the secretion of joint fluid, bring more oxygen and nutrition to articular cartilage, and help cartilage repair and growth.
In addition, the landing time of feet is much shorter when running than when walking, and the pressure on knees is similar to the actual pressure when running and walking.