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Whole-body vibration training versus conventional balance training in patients with severe COPD -- a randomized, controlled trial
Gloeckl R, Schneeberger T, Leitl D, Reinold T, Nell C, Jarosch I, Kenn K, Koczulla AR
Respiratory Research 2021 May 4;22(138):Epub
clinical trial
6/10 [Eligibility criteria: Yes; Random allocation: Yes; Concealed allocation: Yes; Baseline comparability: Yes; Blind subjects: No; Blind therapists: No; Blind assessors: Yes; Adequate follow-up: No; Intention-to-treat analysis: No; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

BACKGROUND: Whole-body vibration training (WBV) performed on a vibration platform can significantly improve physical performance in patients with chronic obstructive pulmonary disease. It has been suggested that an important mechanism of this improvement is based on an improvement in balance. Therefore, the aim of this study was to investigate the effects of WBV compared to conventional balance training. METHODS: 48 patients with severe COPD (FEV1 37 +/- 7 %predicted) and low exercise performance (6 min walk distance (6MWD) 55 +/- 10 %predicted) were included in this randomized controlled trial during a 3 week inpatient pulmonary rehabilitation. All patients completed a standardized endurance and strength training program. Additionally, patients performed 4 different balance exercises 3x/week for 2 sets of 1 min each, either on a vibration platform (Galileo) at varying frequencies (5 to 26 Hz) (WBV) or on a conventional balance board (BAL). The primary outcome parameter was the change in balance performance during a semi tandem stance with closed eyes assessed on a force measurement platform. Muscular power during a countermovement jump, the 6MWD, and 4 m gait speed test (4MGST) were secondary outcomes. Non-parametric tests were used for statistical analyses. RESULTS: Static balance performance improved significantly more (p = 0.032) in favor of WBV (path length during semi-tandem stand -168 +/- 231 mm versus +1 +/- 234 mm). Muscular power also increased significantly more (p = 0.001) in the WBV group (+2.3 +/- 2.5 W/kg versus -0.1 +/- 2.0 W/kg). 6MWD improved to a similar extent in both groups (WBV 48 +/- 46 m, p < 0.001 versus BAL 38 +/- 32 m; p < 0.001) whereas the 4MGST increased significantly only in the WBV-group (0.08 +/- 0.14 m/s2, p = 0.018 versus 0.01 +/- 0.11 m/s2, p = 0.71). CONCLUSIONS: WBV can improve balance performance and muscular power significantly more compared to conventional balance training. TRIAL REGISTRATION: ClinicalTrials.gov registration number NCT03157986; date of registration May 17, 2017. https://ClinicalTrials.gov/ct2/results?cond=&term=NCT03157986&cntry=&state=&city=&dist =.

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