E
Ex member
Yes they both can. They can cause pain in the knees, ankles, hips and spine.
With flat feet it is about alignment, if your foot has no arch then your ankles roll in, which throws everything off in a big chain reaction. For some this causes pain.
Hypermobility causes joint pain, lots of it.
Having both is not fun at all.
I think (or hope) that by doing gymnastics it helps my dd by means of exercising, I have been told that you shouldn't do any high contact sport like Football and Rugby, my dd came home with a letter for an after school Rugby club and I had to say no, pleased that she was keen to do it though lol. My dd's GP is aware that she does gymnastics (he had to sign a Disability Classification form that British Gymnastics require if you want to compete) and has asked for a list of exercises she does in gymnastics. I am grateful that there is a disability class at our gym that enables dd to take part as she would be able to cope in the regular classes.