The reason is that the knee is in contact with the thigh and femur, with meniscus and ligament in the middle. They can only be worn out until people get old and can't use them. Knee health will not be achieved through exercise. The so-called knee exercises, whether it's massaging acupoints, strengthening quadriceps femoris, leg press lacing, etc. It is all to delay the aging process of the knee.

Knees can be maintained in the following ways:

1, static squat:

Back against the wall, feet apart, shoulder width, and gradually extend forward, forming a certain distance from the body center of gravity, about 40 ~ 50 cm. At this time, the body has been squatting, so that the long axis of the calf is vertical to the ground. The included angle between thigh and calf should not be less than 90 degrees. Generally, every time you squat, you can't hold it once, rest for 1 ~ 2 minutes, and then repeat. It is best to repeat it 3 ~ 6 times a day.

2. Bending resistance:

Lie prone on the bed, put a load on one ankle or tie a rubber band for maximum buckling resistance. The purpose of this exercise is to strengthen the muscle strength (hamstring muscle) on the back of thigh. As the antagonistic muscle of quadriceps femoris, the posterior thigh muscle plays an important role in maintaining the balance of the whole joint and the controllability of joint movement, which should be paid attention to. And this action will not lead to the increase of patellofemoral joint pressure, and it is still suitable for patients with severe degenerative osteoarthropathy.

Extended data:

18 years old is the growth period of knee joint, and the pain of knee joint at this stage may be growth period pain.

Teenagers' bones grow and develop rapidly, and metabolites are easy to accumulate at the knee joint. Nocturnal pain often occurs near the knee joint or in the front of the calf, that is, growth pain, which is a normal phenomenon in the growth process of teenagers and will automatically improve after the growth cycle.

Teenagers should pay attention to rest and massage or hot compress the painful parts, which can effectively relieve the pain. Growing pains are mostly intermittent. If you have persistent pain, you should seek medical attention in time to rule out diseases such as bone tumor, childhood leukemia and juvenile arthritis.

Reference link: stay away from the three major misunderstandings in orthopedics. Proper maintenance can prolong the life of the knee _ People's Network