Effects of a Whole body vibration (WBV) exercise intervention for institutionalized older people: A randomized, multicentre, parallel, clinical trial

Mercè Sitjà-Rabert, Ma José Martínez-Zapata, Azahara Fort Vanmeerhaeghe, Ferran Rey Abella, Daniel Romero-Rodríguez, Xavier Bonfill

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Resum

Objectives: To assess the efficacy of an exercise program on a whole-body vibration platform (WBV) in improving body balance and muscle performance and preventing falls in institutionalized elderly people. Design/Setting/Participants: A multicentre randomized parallel assessor-blinded clinical trial was conducted in elderly persons living in nursing homes. Interventions: Participants were randomized to an exercise program performed either on a whole body vibratory platform (WBV plus exercise group) or on a stationary surface (exercise group). The exercise program for both groups consisted of static and dynamic exercises (balance and strength training over a 6-week training period of 3 sessions per week). The frequency applied on the vibratory platform was 30 to 35Hz and amplitude was 2 to 4mm. Measurements: The primary outcome measurement was static/dynamic body balance. Secondary outcomes were muscle strength and number of falls. Efficacy was analyzed on an intention-to-treat basis and per protocol. The effects of the intervention were evaluated using the t test, Mann-Whitney test, or chi-square test, depending on the type of outcome. Follow-up measurements were collected 6weeks and 6months after randomization. Results: A total of 159 participants from 10 centers were included: 81 in the WBV plus exercise group and 78 in the control group. Mean age was 82years, and 67.29% were women. The Tinetti test score showed a significant overall improvement in both groups (P<.001). No significant differences were found between groups at week 6 (P=890) or month 6 (P=718). The Timed Up and Go test did not improve (P=599) in either group over time, and no significant differences were found between groups at week 6 (P=757) or month 6 (P=959). Muscle performance results from the 5 Sit-To-Stand tests improved significantly across time (P=001), but no statistically significant differences were found between groups at week 6 (P=709) or month 6 (P=841). A total of 57 falls (35.8%) were recorded during the follow-up period, with no differences between groups (P=406). Conclusion: Exercise program on a vibratory platform provides benefits similar to those with exercise program on a stationary surface in relation to body balance, gait, functional mobility, and muscle strength in institutionalized elderly people. Longer studies in larger samples are needed to assess falls.

Idioma originalAnglès
Pàgines (de-a)125-131
Nombre de pàgines7
RevistaJournal of the American Medical Directors Association
Volum16
Número2
DOIs
Estat de la publicacióPublicada - 1 de febr. 2015

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