Task: Answer Verification
Input (English): Question: Is flat-footedness a disadvantage for athletic performance in children aged 11 to 15 years?
Answer: No disadvantages in sport performance originating from flat-footedness were confirmed. Children with flat and children with "normal" feet were equally successful at accomplishing all motor tests; thus, we suggest that there is no need for treatment of flexible flat feet with the sole purpose of improving athletic performance, as traditionally advised by many.
Output (English): no