title: The effect of a "wind-up" on forearm rotational velocity.
abstract: Subjects performed supination and pronation of the forearm against an inertial load with maximal voluntary effort, from either rest or when arresting the opposite motion of the load (a wind-up). The angular velocities produced at the mid-range of forearm movement were significantly greater with wind-up than without. The angle from which the movement began was significantly increased by wind-up. Isometric contractions produced torques which varied a great deal through the range of motion. While it was not possible to identify the physiology effects of wind-up, consideration was given to techniques which would achieve this aim. Wind-up was discussed in the context of skilled activity where sustained maximal contractions are unlikely throughout the activity.
mesh_terms: D001696:Biomechanical Phenomena; D005260:Female; D005542:Forearm / Q000502:physiology*; D006801:Humans; D008297:Male; D009068:Movement; D009119:Muscle Contraction