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Effects of amplitudes of whole-body vibration training on left ventricular stroke volume and ejection fraction in healthy young men [Anatol J Cardiol]
Anatol J Cardiol. 2015; 15(12): 976-980 | DOI: 10.5152/akd.2014.5863  

Effects of amplitudes of whole-body vibration training on left ventricular stroke volume and ejection fraction in healthy young men

Farshad Ghazalian1, Laleh Hakemi2, Lotfali Pourkazemi3, Mohammadreza Akhoond4
1Department of Physical Education, Science and Research Branch, Islamic Azad University; Tehran-Iran
2Internal Medicine-Vice President- Sports Medicine Federation-Iran
3Sports Medicine Federation- Iran.
4Department of Statistics, Shahid Chamran University; Ahwaz-Iran.

Objective: The aim of this study was to evaluate the effects of different whole-body vibration (WBV) training amplitudes on left ventricular stroke volume and ejection fraction in healthy young men. Methods: A total of 24 healthy men (age 21.711.49 year, height 176.176.61 cm, weight 70.7310.08 kg, BMI 22.363.57 kg/m2, and body surface area 1.870.13 m2) were divided into two groups: high and low amplitude vibration (n=12). The vibration training consisted of 8 weeks of WBV 3 times a week with amplitudes of 2 or 4 mm and progressive frequencies from 20 Hz with increments of 5 Hz weekly. As outcome measures, left ventricular stroke volume and ejection fraction at baseline and after 8 weeks were evaluated. Mann-Whitney U test was used for the comparison between groups; Wilcoxon signed-ranks tests were used to compare pretest and post-test results in each group. A p value less than 0.05 was considered significant. Results: Whole-body vibration training with low amplitude (2 mm) caused an numerically increase in stroke volume (pre-test: 72.4214.34; post-test: 78.42 23.19 cm3; p=0.06) and ejection fraction (pre-test: 65.223.41; post-test: 67.004.18%; p=0.52). So; the increase was not significant. In the high-amplitude (4 mm) group, post-test results were nearly unchanged compared to the pre-test results. No significant difference was evident between groups. Conclusion: The intensity and volume of whole-body vibration training were not enough to affect systolic function.

Keywords: vibration, training, stroke volume, ejection fraction


Farshad Ghazalian, Laleh Hakemi, Lotfali Pourkazemi, Mohammadreza Akhoond. Effects of amplitudes of whole-body vibration training on left ventricular stroke volume and ejection fraction in healthy young men. Anatol J Cardiol. 2015; 15(12): 976-980


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