Abstract
The purpose of this study was to determine the relative changes in kinetic and potential energy which occurred during the performance of vaults with a fiberglass pole. A 16mm camera was used to film four college pole vaulters during practice over a four-week period. Measurements were made of nine segmental centers of gravity and pole bend from every fifth frame of the best four vaults by each subject. A computer program was developed to calculate from these basic data the following biomechanical components: The vaulter's center of gravity (segmental method), vertical and horizontal velocities, kinetic and potential energies, predicted height, adjusted predicted height, actual height, and vertical energy gained. The decrease in kinetic energy and the increase in potential energy occur at different rates during the vault. The fiberglass pole provides an effective means of transforming kinetic energy to potential energy throughout the vault. Vaulters achieve certain heights by distributing the losses in kinetic energy and gains in potential energy in specific energy patterns.
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