How long can you stand on one foot? The answer may predict your fall risk. The Washington PostHow long can you stand like a flamingo? The answer may reflect your age, new study says CNNSimple one-legged balancing test determines your biological age – so how old are YOU really? Daily MailHow Old Are You? Stand on One Leg and I’ll Tell You MedscapeMayo Clinic study: What standing on one leg can tell you Mayo Clinic