To find out if you experience supination of the ankle, most running shops will perform a gait analysis in store by having you jog on a treadmill or perform a squat then analyzing your form. However, O’Connor said supinated running mechanics aren’t particularly common.
“A properly defined supinated (cavoid) foot type where the foot has minimal or underpronation, is rare, (affecting) only 10% of the population,” she said.
“It is possible to have a very high arched foot that has adequate pronation or overpronation, not all high arched foot types have underpronation or can be described as a 'supinated' or cavoid foot type.”