Flex your foot, continue to breathe and hold for one breath.

Participants were asked to flex their foot against a suite of sensors as quickly as they could.

Split-sole jazz shoes allow enhance shoe flexibility, making it possible to flex the foot more easily.

By controlling the opponent's body, and using the hands to plantar flex the foot either straight or slightly sideways, hence putting considerable torque on the ankle.

In the non-weight-bearing leg, the anterior tibialis dorsal flexes the foot and lifts the medial edge of the foot.