Effect of 6 months of whole body vibration on lumbar spine bone density in postmenopausal women: a randomized controlled trial

Figures & data

Figure 1 Flowchart of this trial.

Abbreviations: n, number; BMD, bone mineral density.

Figure 2 The subject stood on the platform in a natural full standing posture and was monitored by a well-trained physical therapist during whole body vibration.

Table 1 Baseline characteristics of the sample (mean ± SD)

Assessment	WBV group	CON group	P-value
Number (N=28)	14	14
Age (years)	60.1±7.1	62.4±7.1	0.386
Years after menopause	9.8±8.7	10.6±6.9	0.776
BMI (kg/m^2)	22.7± 1.9	23.1 ±4.4	0.749
BMD of lumbar spine (g/cm^2)	0.818±0.088	0.819±0.078	0.992
Proportion of osteopenia and osteoporosis (%)	100	85	0.481

Abbreviations: SD, standard deviation; WBV, whole body vibration; CON, control; N, number; BMI, body mass index; BMD, bone mineral density.

Table 2 Comparative effects of the WBV and CON groups after 6 months (mean ± SD)

	Month 0 BMD (g/cm^2)	Month 6 BMD (g/cm^2)	P-value	Change in BMD (%)	P-value
WBV group	0.818±0.088	0.835±0.098	0.047*	2.032%±3.332%
CON group	0.819±0.078	0.815±0.076	0.188	−0.046%± 1.245%	0.016*

Note:

* P<0.05.

Abbreviations: WBV, whole body vibration; CON, control; SD, standard deviation; BMD, bone mineral density.

Table 3 Comparative effects of the WBV and CON groups after six months (mean ± SD)

	WBV group	CON group	P-value
Difference	0.017±0.029	−0.004±0.011	0.018*
Change in BMD	2.032%±3.332%	−0.046%± 1.245%	0.016*

Notes: Analysis of covariance was used to compare the differences between the two groups and adjust factors such as age, BMI, and number of post-menopausal years.

* P<0.05.

Abbreviations: WBV, whole body vibration; CON, control; SD, standard deviation; BMD, bone mineral density; BMI, body mass index.