High-frequency vibration training increases muscle power in postmenopausal women |
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Authors: | Russo Cosimo Roberto Lauretani Fulvio Bandinelli Stefania Bartali Benedetta Cavazzini Chiara Guralnik Jack M Ferrucci Luigi |
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Affiliation: | Laboratory of Clinical Epidemiology, INRCA Geriatric Department, Florence, Italy. |
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Abstract: | OBJECTIVE: To test whether training on a high-frequency (28Hz) vibrating platform improves muscle power and bone characteristics in postmenopausal women. DESIGN: Randomized controlled trial with 6-month follow-up. SETTING: Outpatient clinic in a general hospital in Italy. PARTICIPANTS: Twenty-nine postmenopausal women (intervention group, n=14; matched controls, n=15). INTERVENTION: Participants stood on a ground-based oscillating platform for three 2-minute sessions for a total of 6 minutes per training session, twice weekly for 6 months. The controls did not receive any training. Both groups were evaluated at baseline and after 6 months. MAIN OUTCOME MEASURES: Muscle power, calculated from ground reaction forces produced by landing after jumping as high as possible on a forceplate, cortical bone density, and biomarkers of bone turnover. RESULTS: Over 6 months, muscle power improved by about 5% in women who received the intervention, and it remained unchanged in controls (P=.004). Muscle force remained stable in both the intervention and control groups. No significant changes were observed in bone characteristics. CONCLUSION: Reflex muscular contractions induced by vibration training improve muscle power in postmenopausal women. |
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Keywords: | Bone density Exercise Muscles Postmenopause Rehabilitation Vibration Women |
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