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A Note on Stability in Force Applied to Control a Repetitive Task With the Legs

1984; Taylor & Francis; Volume: 16; Issue: 3 Linguagem: Inglês

10.1080/00222895.1984.10735323

1940-1027

J. D. Brooke, Andrew R. Chapman, L.J. Fischer, P. Rosenrot,

Muscle activation and electromyography studies

The forces applied to pedals during cycling were collected every 40 ms from approximately 29,000 movement repetitions. Intra-cycle mean values of force and its variability were significantly correlated, supporting Schmidt's impulse variability theory of within-movement activities of the legs. In addition, as mean forces approached peak values, coefficients of variation decreased. From averages taken minute by minute, intra-cycle forces were seen to rise or fall in concert, implying that the pattern as a whole constituted a significant neuro-muscular unit of control.