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Osteoporosis International

, Volume 26, Issue 3, pp 911–920 | Cite as

Bone quality in osteopenic postmenopausal women is not improved after 12 months of whole-body vibration training

  • A. M. Liphardt
  • J. Schipilow
  • D. A. Hanley
  • S. K. Boyd
Original Article

Abstract

Summary

Whole-body vibration training may improve bone quality through structural adaptation. We tested if 12 months of training affects bone structure in osteopenic postmenopausal women by using advanced 3-dimensional high-resolution imaging techniques. We found that whole-body vibration training did not improve bone structure compared to inactive controls.

Introduction

Whole-body vibration training (WBVT) has been suggested as a preventive measure against bone loss. Contradicting results of previous studies may be confounded by insufficiently sensitive bone density measures to detect relevant bone changes. WBVT may improve bone quality through structural adaptations, without increasing bone mineral density (BMD). We hypothesized that 12 months of WBVT will improve or maintain bone microarchitecture and bone strength in osteopenic postmenopausal women.

Methods

Twenty-two women received WBVT for 2–3 sessions/week and were compared with 20 controls. Bone outcomes were measured by high-resolution peripheral quantitative CT (HR-pQCT, XtremeCT, Scanco Medical) and finite element estimated bone strength. Balance and jump performance and maximum voluntary contraction (MVC) of knee flexor and extensor muscles were recorded. All measurements were taken at baseline, 4, 8, and 12 months and a reduced data set at 4 and 8 months follow-up and compared using a mixed model repeated measures ANOVA.

Results

Thirty-one women completed the study with 90 % compliance (WBVT: n = 17, control n = 14). Total BMD (p < 0.001), cortical area*(p = 0.004), cortical thickness (p = 0.011), and cortical porosity (p = 0.024) all significantly decreased over time in both groups; WBVT did not affect the response. All other bone outcomes were not affected by WBVT or time. No difference in measures of balance, jump height, and MVC due to WBVT were detected.

Conclusion

In our cohort, WBVT did not lead to improved bone quality in postmenopausal osteopenic women after 12 months of training compared to controls, and there were no detected benefits related to balance and muscle strength outcomes.

Keywords

Bone quality Finite element analysis High-resolution peripheral quantitative computed tomography (HR-pQCT) Osteopenia Postmenopausal women Whole-body vibration training 

Notes

Acknowledgments

This work was supported by grants from German Research Foundation (Deutsche Forschungsgemeinschaft, DFG) and the Canadian Institutes of Health Research (CIHR). We are thankful for all participating women and their power of endurance to complete the study. Furthermore, we thank the Exercise Physiology group of the Human Performance Laboratory at the University of Calgary for their support and Aneal Khan, Barbara Ramage, and Ion Robu of the Alberta Children’s Hospital for their support of the study. This study would not have been possible without the help of Michelle Kan, Lauren Burt, Eva Szabo, Anne Bauer, and Anna Steinhoff.

Conflicts of interest

None.

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Copyright information

© International Osteoporosis Foundation and National Osteoporosis Foundation 2014

Authors and Affiliations

  • A. M. Liphardt
    • 1
    • 2
    • 5
  • J. Schipilow
    • 1
    • 2
    • 3
  • D. A. Hanley
    • 3
  • S. K. Boyd
    • 1
    • 2
    • 3
    • 4
  1. 1.Schulich School of EngineeringUniversity of CalgaryCalgaryCanada
  2. 2.Roger Jackson Centre for Health and Wellness ResearchUniversity of CalgaryCalgaryCanada
  3. 3.McCaig Institute for Bone and Joint HealthUniversity of CalgaryCalgaryCanada
  4. 4.Department of RadiologyUniversity of CalgaryCalgaryCanada
  5. 5.German Sport University Cologne (DSHS Köln), Institute of Training Science and Sport InformaticsInstitute of Biomechanics and OrthopedicsKölnGermany

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