Immediate effects after stochastic resonance whole-body vibration on physical performance on frail elderly for skilling-up training: a blind cross-over randomised pilot study.
OBJECTIVE
This pilot study examined the feasibility outcome recruitment, safety and compliance of the investigation for stochastic resonance whole-body vibration (SR-WBV) training. Another aim was to evaluate the effect size of one SR-WBV intervention session on Short Physical Performance Battery (SPPB), Expanded Timed Get Up-and-Go (ETGUG), isometric maximal voluntary contraction (IMVC) and rate of force development (IRFD) and chair rising (CR).


METHODS
Randomised double-blinded controlled cross-over pilot study.


METHODS
Feasibility outcomes included recruitment, safety and compliance. For secondary outcomes, SPPB, ETGUG, IMVC, IRFD and CR were measured before and 2-min after intervention. Nonparametric Rank-Order Tests of Puri and Sen L Statistics to Ranked Data were proposed. Wilcoxon signed-ranked tests were used to analyse the differences after SR-WBV intervention and sham intervention. Treatment effects between the interventions were compared by a Mann-Whitney U test.


RESULTS
Among 24 eligible frail elderly, 12 agreed to participate and 3 drop out. The adherence was 15 of 24 intervention sessions. For secondary outcome, effect sizes (ES) for SR-WBV intervention on SPPB, ETGUG and CR were determined.


CONCLUSIONS
This pilot study indicate that the training protocol used in this form for frail elderly individuals is feasible but with modification due to the fact that not all defined feasibility outcomes target was met. SR-WBV with 6 Hz, noise level 4 shows benefit improvements on SPPB (ES 0.52), ETGUG (part sit-to-stand movement: ES 0.81; total time: ES 0.85) and CR (ES 0.66). Further research is desired to determine whether a new adapted training protocol is necessary for SR-WBV in the "skilling up" phase in frail elderly individuals.
Bern University of Applied Sciences, Discipline Physiotherapy, Murtenstrasse 10, 3008, Bern, Switzerland, slavko.rogan@bfh.ch.
Slavko
S
Rogan
Dietmar
D
Schmidtbleicher
Lorenz
L
Radlinger
D000368:Aged; D000369:Aged, 80 and over; D015992:Body Mass Index; D018592:Cross-Over Studies; D004311:Double-Blind Method; D005081:Exercise Therapy; D005260:Female; D016330:Frail Elderly; D006801:Humans; D008297:Male; D010349:Patient Compliance; D026741:Physical Therapy Modalities; D010865:Pilot Projects; D013269:Stochastic Processes; D016896:Treatment Outcome; D014732:Vibration