Graduate Thesis Or Dissertation
 

External and internal work of a T-6 paraplegic propelling a wheelchair and arm cranking a cycle ergometer : case study

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  • The purpose of this investigation was to compare the results of two methods of gathering data on the stress of wheelchair propelling at equivalent work loads and to account for differences in physiological responses with a mechanical analysis of wheelchair propelling. Physiological data collected were heart rate, systolic blood pressure, and rate-pressure product. A biomechanical cinematography analysis was used to determine external work in wheelchair propelling. Ergometer settings determined external work in arm cranking cycle ergometry. A t-test of equivalent external work loads indicated that heart rate was not different between the two exercise modes at the . 05 level of significance. The t-tests did indicate a significant difference in systolic blood pressure and rate-pressure product at the . 05 level of significance. The biomechanical analysis of wheelchair propelling established that an increase in external work was accompanied by a decrease in the range of motion and an increase in the speed of movement. During cycle ergometry the range and speed of movement remained the same while the resistance was increased. Results of the study established that while heart rate for equivalent external work loads was the same for wheelchair propelling and arm cranking cycle ergometry, systolic blood pressure and rate-pressure product were not the same.
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