title: Relationships between preferred and maximum effort low-back motion.
abstract: The purpose of this study was to determine if subjects differed in their preferred and maximum effort low-back-movement characteristics, and to determine if preferred low-back-movement characteristics could contribute to the prediction of maximum effort performance parameters. Sixteen subjects performed a flexibility trial, isometric exertions, and both maximum effort and preferred effort repetitive trunk motion against a resistance set at 50% of the recorded maximum isometric torques. All movement directions about all three primary axes were examined. The results showed that the preferred low-back-movement characteristics were different from those when a maximum effort was requested, although the performances were equally consistent. It was possible to reasonably predict maximum effort velocities from a knowledge of the preferred effort velocities.
authors.affiliation: Isotechnologies Inc., Hillsborough, NC, USA.
authors.forename: D R
authors.initials: DR
authors.lastname: McIntyre
authors.forename: L H
authors.initials: LH
authors.lastname: Glover
authors.forename: D C
authors.initials: DC
authors.lastname: Reynolds