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Whole-body vibration intensities in chronic stroke: a randomized controlled trial
Liao L-R, Ng GYF, Jones AYM, Huang M-Z, Pang MYC
Medicine and Science in Sports and Exercise 2016 Jul;48(7):1227-1238
clinical trial
8/10 [Eligibility criteria: Yes; Random allocation: Yes; Concealed allocation: Yes; Baseline comparability: Yes; Blind subjects: No; Blind therapists: No; Blind assessors: Yes; Adequate follow-up: Yes; Intention-to-treat analysis: Yes; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

PURPOSE: A single-blinded, randomized controlled study was conducted to investigate the effects of different whole-body vibration (WBV) intensities on body functions/structures, activity, and participation in individuals with stroke. METHODS: Eighty-four individuals with chronic stroke (mean age 61.2 years, SD 9.2) with mild to moderate motor impairment (Chedoke-McMaster Stroke Assessment lower limb motor score: median 9 out of 14, interquartile range 7 to 11.8) were randomly assigned to a low-intensity WBV, high-intensity WBV, or control group. The former 2 groups performed various leg exercises while receiving low-intensity and high-intensity WBV, respectively. Controls performed the same exercises without WBV. All individuals received 30 training sessions over an average period of 75.5 days (SD 5.2). Outcome measurements included knee muscle strength (isokinetic dynamometry), knee and ankle joint spasticity (Modified Ashworth Scale), balance (Mini Balance Evaluation Systems Test, Mini-BESTest), mobility (Timed-Up-and-Go test, TUG), walking endurance (6-Minute Walk Test, 6MWT), balance self-efficacy (Activities-specific Balance Confidence scale, ABC), participation in daily activities (Frenchay Activity Index), perceived environmental barriers to societal participation (Craig Hospital Inventory of Environmental Factors), and quality of life (Short-Form 12 Health Survey, SF-12). Assessments were performed at baseline and post-intervention. RESULTS: Intention-to-treat analysis revealed a significant time effect for muscle strength, TUG, distance, and oxygen consumption rate achieved during 6MWT, Mini-BESTest, ABC, and SF-12 physical composite score domain (p < 0.05). However, the time by group interaction was not significant for any of the outcome measures (p > 0.05). CONCLUSION: Addition of the 30-session WBV paradigm to the leg exercise protocol was no more effective in enhancing body functions/structures, activity, and participation than leg exercises alone, chronic stroke patients with mild to moderate motor impairments.

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