Yes!!

My daughter did this alot & developed ankle, knee & hip problems which we didn't discover till she was about 10 & by then getting her to wear the orthotics inside her shoes everyday was a disaster, my son doesn't do it to any great extent but he does have weak knees & ankles (he's 9) my daughter now about to be 16 is paying the price for it not being recognized & dealt with sooner & for her refusing to do all the right things when it was diagnosed & treated.

My son does the same thing and lays on his tummy and wobbles back and forth....I dont think its anything to worry about, because I know that my friends son did it and hes just fine....