Liphardt A M, Schipilow J, Hanley D A, Boyd S K
Schulich School of Engineering, University of Calgary, Calgary, AB, Canada.
Osteoporos Int. 2015 Mar;26(3):911-20. doi: 10.1007/s00198-014-2995-8. Epub 2015 Jan 8.
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.
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.
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.
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.
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.
全身振动训练可能通过结构适应来改善骨质。我们使用先进的三维高分辨率成像技术测试了12个月的训练是否会影响骨质疏松绝经后女性的骨结构。我们发现，与不进行运动的对照组相比，全身振动训练并未改善骨结构。
全身振动训练（WBVT）已被提议作为预防骨质流失的措施。先前研究结果相互矛盾，可能是由于骨密度测量不够灵敏，无法检测到相关的骨变化。全身振动训练可能通过结构适应来改善骨质，而不增加骨矿物质密度（BMD）。我们假设，12个月的全身振动训练将改善或维持骨质疏松绝经后女性的骨微结构和骨强度。
22名女性接受每周2 - 3次的全身振动训练，并与20名对照组进行比较。通过高分辨率外周定量CT（HR - pQCT，XtremeCT，Scanco Medical）和有限元估计骨强度来测量骨结果。记录平衡和跳跃性能以及膝部屈肌和伸肌的最大自主收缩（MVC）。所有测量均在基线、4个月、8个月和12个月时进行，在4个月和8个月随访时采用简化数据集，并使用混合模型重复测量方差分析进行比较。
31名女性完成了研究，依从性为90%（全身振动训练组：n = 17，对照组n = 14）。两组的总骨密度（p < 0.001）、皮质面积*（p = 0.004）、皮质厚度（p = 0.011）和皮质孔隙率（p = 0.024）均随时间显著下降；全身振动训练未影响该反应。所有其他骨结果均未受全身振动训练或时间的影响。未检测到全身振动训练在平衡、跳跃高度和最大自主收缩测量方面的差异。
在我们的队列中，与对照组相比，12个月的训练后，全身振动训练并未使绝经后骨质疏松女性的骨质得到改善，且未发现与平衡和肌肉力量结果相关的益处。
