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Non-invasive Vibratory Stimulation of the Knee Muscles for the Improvement of the Somatosensory Input and Motor Performance

NCT07424066 · Status: RECRUITING · Phase: NA · Type: INTERVENTIONAL · Enrollment: 35

Last updated 2026-02-20

No results posted yet for this study

Summary

The goal of this interventional cross-sectional study is to evaluate motor responses to non-invasive vibratory stimulation applied to the hamstring muscle tendons in healthy individuals. Knee flexion and extension efforts, in both isometric and concentric contractions, will be tested.

The investigators hypothesize that vibratory stimulation causes an increase in activity in the flexor muscles (hamstrings) and a decrease in the extensor muscles (quadriceps) of the knee in all motor tasks. It follows that during knee flexion (both concentric and isometric), vibratory stimulation should cause an increase in the distance between the angular trajectories of the knee obtained with and without vibratory stimulation (with a positive sign). The increased activity of the hamstring muscles would, in fact, contribute to increasing the velocity of the flexor movement. Conversely, during extensor movements (both concentric and isometric), vibratory stimulation should reduce the instantaneous velocity of the movement, therefore causing an increase in distance (with a negative sign) between the trajectories obtained with and without stimulation.

Participants will be tested using an isokinetic dynamometer and they will be asked to perform the following motor tasks in a random order: concentric knee flexion, concentric knee extension, isometric knee flexion, and isometric knee extension. The dominant limb will be tested, only. The assessment will be performed one time.

Conditions

  • Vibration

Interventions

DEVICE

Vibratory stimulation

A vibratory stimulator will be applied to the back of the dominant leg, at the level of the hamstring muscle tendons. The stimulator consists of two small vibrating boxes fixed to the leg by means of an elastic band.

Sponsors & Collaborators

  • Istituto Auxologico Italiano

    collaborator OTHER

  • University of Milano Bicocca

    lead OTHER

Principal Investigators

  • Cristiano Alessandro, Engineering · University of Milano Bicocca

Study Design

Allocation
NA
Purpose
BASIC_SCIENCE
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2025-05-20
Primary Completion
2026-12-31
Completion
2026-12-31

Countries

  • Italy

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07424066 on ClinicalTrials.gov