title: An isokinetic evaluation of trunk strength in elite female field hockey players.
abstract: A Kin-Corn dynamometer was used to evaluate trunk extensor and flexor strength in 11 elite female field hockey players. Average torques during maximal concentric and eccentric muscle actions through a range of movement from 25° of extension to 30° of flexion were measured at angular velocities of 30°.s(-1) and 60°.s(-1). Strength curve shape, average torque values and derived eccentric/concentric and trunk extensor/flexor ratios were analysed. The strength curves displayed greatest torques in the lengthened position for both muscle groups. Statistical analysis revealed no significant difference in strength between first and second test occasions (p=0.9920). Muscle action (eccentric versus concentric) and group (extensors versus flexors) were significant main effects (p <0.0001). There was no significant difference between torques at 30°.s(-1) and 60°.s(-1). The trunk extensor/flexor ratio approximated 1.75 for eccentric muscle action and 1.82 for concentric muscle actions. Gravity correction did not affect strength data but did affect strength curve shape. The results can be utilised to design individual prophylactic exercise programs for back pain.
authors.forename: A
authors.initials: A
authors.lastname: Hoens
authors.forename: M
authors.initials: M
authors.lastname: Telfer
authors.forename: G
authors.initials: G
authors.lastname: Strauss
keywords: Hockey; Muscle performance, measurement