1727, from Japanese samurai warrior, knight, originally the military retainer of the daimio, variant of saburai, nominal form of sabura(h)u to be in attendance, to serve..
The bubbles make a noise when they burst. This is called cavitation. Another cause for painless popping in the knee is when the ligaments and tendons catch as they go over a bony lump and pop when they snap back into place. Or the clicking and popping may be caused by catching on soft tissue or scar tissue within the knee.
In most cases, this is nothing to be concerned about. In fact, the theory that popping your joints will lead to arthritis has absolutely no support in the research literature. Now some folks will notice a grinding noise in the knee joint when they squat. If it's not painful, itâs categorized as âbenign creptiusâ which, again. is nothing to be concerned about.