pronation

/proʊˈneɪʃən/
noun
  1. The rotation of the hand or forearm so that the palm faces downward or backward.
    • The exercise involves a slow pronation of the forearm while holding a weight.
    • He practiced pronation and supination to improve his tennis swing.
    • Pronation of the hand helps you pour liquid from a pitcher.
  2. The inward roll of the foot while walking or running, a natural part of the gait cycle.
    • The running store analyzed her pronation to recommend the right sneakers.
    • Overpronation can lead to shin splints and other injuries.
    • A small amount of pronation helps absorb shock when your foot hits the ground.
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