Are Bone and Muscle Changes from POWER PE, an 8-month In-school Jumping Intervention, Maintained at Three Years?

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Title Are Bone and Muscle Changes from POWER PE, an 8-month In-school Jumping Intervention, Maintained at Three Years?
Author Weeks, Benjamin Kurt; Beck, Belinda Ruth
Journal Name PLoS ONE
Year Published 2012
Place of publication United States
Publisher Public Library of Science
Abstract Our aim was to determine if the musculoskeletal benefits of a twice-weekly, school-based, jumping regime in healthy adolescent boys and girls were maintained three years later. Subjects of the original POWER PE trial (n = 99) were contacted and asked to undergo retesting three years after cessation of the intervention. All original measures were completed including: sitting height, standing height, weight, calcaneal broadband ultrasound attenuation (BUA), whole body, hip and spine bone mineral content (BMC), lean tissue mass, and fat mass. Physical activity was recorded with the bone-specific physical activity questionnaire (BPAQ) and calcium intake was estimated with a calcium-focussed food questionnaire. Maturity was determined by Tanner staging and estimation of the age of peak height velocity (PHV). Twenty-nine adolescents aged 17.3 +/-0.4 years agreed to participate. Three years after the intervention, there were no differences in subject characteristics between control and intervention groups (p<0.05). Three-year change in weight, lean mass, and fat mass were similar between groups (p<0.05). There were no significant group differences in three-year change in BUA or BMC at any site (p<0.05), although the between-group difference in femoral neck BMC at follow-up exceeded the least significant change. While significant group differences were not observed three years after cessation of the intervention, changes in bone parameters occurred in parallel for intervention and control groups such that the original benefits of the intervention observed within the treatment group were sustained.
Peer Reviewed Yes
Published Yes
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Copyright Statement Copyright 2012 Weeks et al. This is an Open Access article distributed under the terms of the Creative Commons Attribution License CCAL. (
Volume 7
Issue Number 6
Page from e39133-1
Page to e39133-6
ISSN 1932-6203
Date Accessioned 2012-06-21
Language en_US
Research Centre Centre for Musculoskeletal Research; Menzies Health Institute Qld
Faculty Griffith Health Faculty
Subject Exercise Physiology; Paediatrics
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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