Whole-body vibration improves neuromuscular parameters and functional capacity in osteopenic postmenopausal women.
In this longitudinal, paired-control study, we developed special vibration platforms to evaluate the effects of low-intensity vibration on neuromuscular function and functional capacity in osteopenic postmenopausal women.



Women in the platform group (PG; n = 62) stood still and barefoot on the platform for 20 minutes, 5 times a week for 12 months. Each platform vibrated with a frequency of 60 Hz, intensity of 0.6g, and amplitude of less than 1 mm. Women in the control group (CG; n = 60) were followed up and instructed not to modify their physical activity during the study. Every 3 months all volunteers were invited to a visit to check for any change in their lifestyle. Assessments were performed at baseline and at 12 months, and included isometric muscle strength in the hip flexors and back extensors, right handgrip strength, dynamic upper limb strength (arm curl test), upper trunk flexibility (reach test [RT]), mobility (timed up and go test), and static balance (unipedal stance test). Statistical analyses were performed using the intention-to-treat strategy.



Both groups were similar for all variables at baseline. At the end of intervention, the PG was significantly better than CG in all parameters but in the RT. When compared with baseline, after 12 months of vibration the PG presented statistically significant improvements in isometric and dynamic muscle strength in the hip flexors (+36.7%), back extensors (+36.5%), handgrip strength (+4.4%), arm curl test (+22.8%), RT (+9.9%), unipedal stance test (+6.8%), and timed up and go test (-9.2%), whereas the CG showed no significant differences during the same period of time. As such, there were no side effects related to the study procedures during the 12 months of intervention.



Low-intensity vibration improved balance, motility, and muscle strength in the upper and lower limbs in postmenopausal women.
1Division of Endocrinology, Escola Paulista de Medicina, Universidade Federal de São Paulo, Sao Paulo, Brazil 2Department of Bioengeneering, Universidade de São Paulo (USP) de São Carlos, Sao Paulo, Brazil.
Milena C
MC
Dutra
Mônica L
ML
de Oliveira
Rosangela V
RV
Marin
Hellen C R
HC
Kleine
Orivaldo L
OL
Silva
Marise
M
Lazaretti-Castro
D001851:Bone Diseases, Metabolic / Q000503:physiopathology* / Q000628:therapy*; D016022:Case-Control Studies; D005260:Female; D018737:Hand Strength; D006801:Humans; D008137:Longitudinal Studies; D008875:Middle Aged; D053580:Muscle Strength; D026741:Physical Therapy Modalities; D017698:Postmenopause / Q000502:physiology*; D016896:Treatment Outcome; D014732:Vibration / Q000627:therapeutic use*