RCVibro System: full description of a custom-made vibratory system and its reliability.
Marcelo Pinto Pereira, Paulo Henrique Silva Pelicioni, Lilian Teresa Bucken Gobbi
PMID 28941960WHAT IT FOUND
A custom-built muscle vibration system delivered consistent frequencies across days and shifted body weight forward in healthy adults.
This validates the device's technical reliability for research use, not its clinical effectiveness for patient movement.
Key findings
01The custom vibratory system showed very high agreement for frequency delivery within the same day and between different days, with only one device showing lower initial agreement that resolved on retesting.
02When applied to the shin muscle in healthy adults, the system caused a measurable forward shift in center-of-pressure position and increased sway velocity, replicating known physiological effects of vibration.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
The functionality test was conducted only on healthy young adults, so it is unknown if the device produces the same reliable effects or is safe for people with motor impairments, spasticity, or sensory loss. The order of testing was not randomized (always no-vibration first, then vibration), which could introduce order effects, though the authors argue this minimized carryover. One device showed lower reliability initially, suggesting that custom-built equipment requires rigorous, ongoing calibration checks before use. The study measured physiological responses in standing, not functional outcomes like walking or reaching, so it does not demonstrate therapeutic benefit.
Declared interests
The authors declare no conflicts of interest.
The easy way to misread this
Do not interpret the forward center-of-pressure shift as evidence that this device improves balance or gait in patients. The study only tested healthy adults in a lab setting to verify the device works; it did not test clinical populations or functional tasks.