The standard posture is to bend your knees 90 degrees and squat down against the wall, but many people don't use too much force at first, otherwise bending your knees 90 degrees will hurt. You can exercise from 120 degrees and gradually reach 90 degrees. It can improve the knee joint problem very well.
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Precautions for squatting against the wall:
Since it is exercise, if it is only a scratch, it will not have a good effect. Don't stop if your thighs are not sore, but that doesn't mean that the longer you sit, the better. Because the specific situation varies from person to person, there is no fixed standard answer for how long to squat, and everyone's ability will be different.
You can usually sit still until you feel sore. Squat shallow, the time can be slightly longer, squat deep, the time can be short. When you do this action for the first time, it is not recommended to persist until you can't persist. There is a step-by-step process, usually starting from 10- 15 seconds at a time, taking a break of 30 seconds between actions, doing 3-5 groups at a time, and then gradually increasing the number of times with the improvement of your ability.
People's Health Network-Practice static squat, stand with your knees protected, stand with your chest and feet apart, and slowly squat to 45 degrees.