What do people do wrong in their weight transfer that could cause the side of their knees to hurt afterwards?

[DaN3]

After playing table tennis, these red areas in my knees hurt, and I think it is because of my weight transfer in forehand topspins or loops. Some people have told me that this happens because I do wrong movements. What do people do wrong in their weight transfer that could cause the side of their knees to hurt afterwards, and how should they fix it?

 

[UpSideDownCarl]

After playing table tennis, these red areas in my knees hurt, and I think it is because of my weight transfer in forehand topspins or loops. Some people have told me that this happens because I do wrong movements. What do people do wrong in their weight transfer that could cause the side of their knees to hurt afterwards, and how should they fix it?
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I am not sure it is an issue of wrong and right. The rotational force of a stroke in many racket sports puts torque on your knees. Therefore it can be hard on your knees. But the more your feet are allowed to move with the stroke, the less torque you will put in your knees.

Can you post footage of some FH strokes? Not much: maybe a few counterhits, a few larger drives and a few loops. Footage where we can see your feet?

If your feet are planted and don't move enough that puts more torque on your knees.

 

[turbozed]

Your technique might be fine but you'll still suffer from an overuse injury you have too much training volume than your body can handle. If you went from being completely sedentary to playing a few hours a day, a few times a week, this is sometimes enough volume to cause issues without taking some sort of recovery break.

Take a week or so off, then see how you feel. If the pain disappears, that means you've recovered and you can likely handle slightly more training volume now. When you start feeling joint pain again, then rest again. Rinse and repeat.