Year: 1998
Type: dissertation
Study design: Clinical Trial
Abstract: This study examined the effects of imagery and belief in imagery on concentric and eccentric quadriceps force production as measured by a Kin-Com isokinetic dynamometer over three consecutive weeks.Nineteen healthy female university students volunteered for this study and were divided into three groups: 1) imagery, 2) imagery + belief, and 3) control.Following week one baseline testing, groups 1 and 2 were instructed in imagery techniques and practiced an imagery script of the Kin-Com testing protocol for 3 to 5 minutes daily.Group 3 underwent a nonsense intervention and read selected articles daily.On week two, repeat isokinetic testing was performed.Group 2 underwent an intervention to promote belief in imagery, group 1 a second imagery intervention, and group 3 a second nonsense intervention.Groups 1 and 2 continued daily imagery, and group 3 daily reading.On week three, final isokinetic testing was performed.The Movement Imagery Questionnaire-Revised and a general questionnaire were administered to investigate imagery ability, belief in the imagery intervention, and spontaneous imagery by the control group.Two-way ANOVAs revealed a significant group by time interaction for average concentric force (F= 2.75, p = 0.045) and peak concentric force (F= 2.91, p = 0.037).Post-hoc Bonferroni r-tests showed a significant improvement in average concentric force for the imagery group between the first and third week (t=2.730,p = 0.017); and the imagery + belief group between the first and second week (t= 4.438, g = 0.0035); and peak concentric force for the imagery + belief group between the first and second week (t= 4.996, p = 0.002); and the first and third week (t= 3.465, p = 0.009).No significant group by time interaction was found for average eccentric force (F= 1.087, p = 0.379) or peak eccentric force (F= 1.578, E= 0.204).Results of this study suggest that imagery is beneficial for improving concentric quadriceps motor performance.Promoting belief in imagery does not appear to be a necessary component for enhancing quadriceps force production.
Source: The Mathematics Enthusiast
Author: Patricia M. Mangan
Language: English
Subfield: Developmental and Educational Psychology
Field: Psychology
Domain: Social Sciences
Open Access status: green
OpenAlex ID: W2472860788