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Computerized system for measurement of force exerted within each pedal revolution during cycling

1981; Elsevier BV; Volume: 26; Issue: 1 Linguagem: Inglês

10.1016/0031-9384(81)90090-1

1873-507X

J. D. Brooke, J. Hoare, P. Rosenrot, Russell Triggs,

Muscle activation and electromyography studies

Human bipedal behavior merits physiological study, to identify both basic control mechanisms and factors causing deterioration of control. The prerequisite of measurement of the force exerted, in this instance within each pedal cycle, has been obtained through a computerized system. Strain gauge transducer on force pedals were linked through a mini-computer A/D interface and timer to measure force per 7 degrees pedal rotation and to accumulate data from successive cycles. Means, standard deviations and coefficients of variation were tabulated for later on-line analysis via a large computer. The 95% confidence bands for calibration of the system were within ± 0.6 N. Such bands for replicability of subjects at particular angular positions in the power generating phase were within ± 29 N both within trials and between trials on the same day. ANOVA revealed replicability coefficients of 0.95 to 0.99 when stability of the force for each angular position was assessed in a composite design for within trial, between trial and between day terms.