Muscle Vibration and Joint Position Sense

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

45 participants

Study Classification

INTERVENTIONAL

Study Start Date

2018-06-06

Study Completion Date

2018-11-15

Brief Summary

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The present study aimed to investigate and compare the acute effect of local vibration (63 Hz vs 42 Hz frequencies) on the biceps brachii muscles on the elbow joint position sense (JPS) in healthy young men. Forty-five healthy young men aged 19 to 30 years were enrolled in the study. The participants were randomly assigned to receive either 63 Hz (n=15) or 42 Hz (n=15) or sham vibration (control group) (n=15). Participants in the experimental group received five bouts of 1-minute of each vibration exposure localized to the biceps brachii muscle, with a 1-minute rest between the bouts. Active elbow joint position error (in degrees) was selected as an outcome measure to assess elbow JPS. To measure active elbow joint position error, the subject was made to sit on the chair with eyes closed and shoulders in 0 degree of abduction and elbows fully extended. The examiner passively moved the elbow to 90 degrees of flexion (target position) and maintained it for 10 seconds. The subject was requested to memorize the target position. The subject was asked to actively flex the elbow to the target position from the initial starting position (elbow fully extended) and hold it for 5 seconds. Three trials were conducted, with a 30-second rest given between each trial. The target and reproduced angles in each trial were measured using a standard plastic goniometer. The difference between the target and reproduced angles in each trial was calculated to determine active elbow joint position error. Measurements were taken at baseline and immediately after the vibration protocol.

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Detailed Description

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Conditions

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Vibration; Exposure

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

OTHER

Blinding Strategy

DOUBLE

Participants Outcome Assessors

Study Groups

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63 Hz vibration group

Vibration of 63 Hz frequency was applied.

Group Type EXPERIMENTAL

63 Hz Vibration

Intervention Type OTHER

Vibrations of 63 Hz were applied with handheld vibration device.

42 Hz vibration group

Vibration of 42 Hz frequency was applied.

Group Type ACTIVE_COMPARATOR

42 Hz Vibration

Intervention Type OTHER

Vibrations of 42 Hz were applied with handheld vibration device.

Sham vibration group

No actual vibration was applied.

Group Type SHAM_COMPARATOR

Sham vibration

Intervention Type OTHER

Handheld device was applied to the participants without any vibrations.

Interventions

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63 Hz Vibration

Vibrations of 63 Hz were applied with handheld vibration device.

Intervention Type OTHER

42 Hz Vibration

Vibrations of 42 Hz were applied with handheld vibration device.

Intervention Type OTHER

Sham vibration

Handheld device was applied to the participants without any vibrations.

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* Healthy young men

Exclusion Criteria

* history of recent upper extremity surgery
* history of sensory deficits in the upper extremity
* recent upper extremity injury
* undergoing any resistance training

Minimum Eligible Age

19 Years

Maximum Eligible Age

30 Years

Eligible Sex

MALE

Accepts Healthy Volunteers

Yes