This Article Full Text (PDF) References Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Similar articles in PubMed Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Tihanyi, T. K. Articles by Tihanyi, J. Search for Related Content PubMed PubMed Citation Articles by Tihanyi, T. K. Articles by Tihanyi, J. Social Bookmarking                         What's this?

One session of whole body vibration increases voluntary muscle strength transiently in patients with stroke

Semmelweis University, Budapest, tihanyi{at}mail.hupe.hu

Mónika Horváth

Department of Rehabilitation Medicine, Saint John Hospital Budapest, Hungary

Gábor Fazekas

Department of Rehabilitation Medicine, Saint John Hospital Budapest, Hungary

Tibor Hortobágyi

East Carolina University Greenville, North Carolina, USA

József Tihanyi

Semmelweis University, Budapest, Hungary

Objective: To determine the effect of whole body vibration on isometric and eccentric torque and electromyography (EMG) variables of knee extensors on the affected side of stroke patients.

Design: A randomized controlled study.

Setting: A rehabilitation centre.

Subjects: Sixteen patients (age 58.2 ± 9.4 years) were enrolled in an inpatient rehabilitation programme 27.2 ± 10.4 days after a stroke.

Interventions: Eight patients were randomly assigned to the vibration group and received 20 Hz vibration (5 mm amplitude) while standing on a vibration platform for 1 minute six times in one session. Patients in the control group also stood on the platform but did not receive vibration.

Main measures: Maximum isometric and eccentric torque, rate of torque development, root-mean-squared EMG, median frequency of vastus lateralis, and co-activation of knee flexors.

Results: Isometric and eccentric knee extension torque increased 36.6% and 22.2%, respectively, after vibration (P < 0.05) and 8.4% and 5.3% in the control group. Vibration increased EMG amplitude 44.9% and the median frequency in the vastus lateralis by 13.1% (all P < 0.05) without changes in the control group (10.6% and 3.9%). Vibration improved the ability to generate mechanical work during eccentric contraction (17.5%). Vibration reduced biceps femoris co-activation during isometric (8.4%, ns) and eccentric (22.5%, P < 0.05) contraction.

Conclusion: These results suggest that one bout of whole body vibration can transiently increase voluntary force and muscle activation of the quadriceps muscle affected by a stroke.

Clinical Rehabilitation, Vol. 21, No. 9, 782-793 (2007)
DOI: 10.1177/0269215507077814


CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter    What's this?