Influence of drop-landing exercises on bone geometry and biomechanical properties in prepubertal girls: A randomized controlled study
Journal article
Greene, David A., Wiebe, Peter N. and Naughton, Geraldine A.. (2009). Influence of drop-landing exercises on bone geometry and biomechanical properties in prepubertal girls: A randomized controlled study. Calcified Tissue International. 85(2), pp. 94 - 103. https://doi.org/10.1007/s00223-009-9253-7
Authors | Greene, David A., Wiebe, Peter N. and Naughton, Geraldine A. |
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Abstract | We conducted a 28-week school-based exercise trial of single-leg drop-landing exercise with 42 girls (Tanner stage 1, 6–10 years old) randomly assigned to control (C), low-drop (LD), or high-drop (HD) exercise groups. The LD and HD groups performed single-leg drop-landings (three sessions/week and 50 landings/session) from 14 and 28 cm, respectively, using the nondominant leg. Single-leg peak ground-reaction impact forces in a subsample ranged between 2.5 and 4.4 times body weight. Dependent variables were bone geometry and biomechanical properties using magnetic resonance imaging. No differences (P > 0.05) were found among groups at baseline for age, stature, lean tissue mass (DXA - Lunar 3.6-DPX), leisure-time physical activity, average daily calcium intake, or measures of knee extensor or flexor torque. A series of ANOVA and ANCOVA tests showed no within- or between-group differences from baseline to posttraining. Group comparisons assessing magnitude of change in side-to-side differences in geometry (area cm2) and cross-sectional moment of inertia (cm4) at proximal, mid, and distal sites revealed negligible effect sizes. Our findings suggest that strictly controlled unimodal, unidirectional single-leg drop-landing exercises involving low to moderate peak ground-reaction impact forces do not influence geometrical or biomechanical measures in the developing prepubertal female skeleton. |
Year | 2009 |
Journal | Calcified Tissue International |
Journal citation | 85 (2), pp. 94 - 103 |
Publisher | Springer New York LLC |
ISSN | 1432-0827 |
Digital Object Identifier (DOI) | https://doi.org/10.1007/s00223-009-9253-7 |
Scopus EID | 2-s2.0-69249218996 |
Page range | 94 - 103 |
Research Group | Sports Performance, Recovery, Injury and New Technologies (SPRINT) Research Centre |
Place of publication | United States of America |
https://acuresearchbank.acu.edu.au/item/885yy/influence-of-drop-landing-exercises-on-bone-geometry-and-biomechanical-properties-in-prepubertal-girls-a-randomized-controlled-study
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