Objective: Hamstring shortening may cause postural defect and gait abnormality. Recently, it has been showed that application of whole body vibration may increase muscle flexibility in normal subject. This study has been designed to find the effect of local hamstring vibration on the hamstring shortening.
Methods: 30 non-athletic females (aged 18-22 yrs) who suffer from more than 15 degree hamstring shortness were participated in the study (inclusion crtiteria). exclusion criteria is neuromuscular or musculoskeletal conditions, deformities and history of lower limb fractures. Then the subjects were assigned in one of the two experimental groups; vibration group (3 times a week for 8 weeks) and control group (no intervention). The subjects in both groups were not allowed to perform any sport activity during 8 weeks of study. Before and after the intervention, the rate of hamstring muscle shortness was evaluated by passive knee extension (PKE) test.
In the experimental group, Intervention inculded Vibration training sessions over the middle line of the posterior aspect of thigh as follows: first and second week: three sets of 20 secs (with 1 min rest); third and fourth week: three sessions of 30 secs with 1 min rest; fifth and sixth week: three sets of 45 secs (with 45 secs rest). Seventh and eighth week: 4 sets of 1 min (with 1 min rest).
General information
Acronym
IRCT registration information
IRCT registration number:IRCT201011031254N6
Registration date:2010-11-26, 1389/09/05
Registration timing:registered_while_recruiting
Last update:
Update count:0
Registration date
2010-11-26, 1389/09/05
Registrant information
Name
Amir Hoshang Bakhtiary Davijani
Name of organization / entity
Semnan University of Medical Sciences
Country
Iran (Islamic Republic of)
Phone
+98 23 1444 1983
Email address
amirbakhtiary@sem-ums.ac.ir
Recruitment status
Recruitment complete
Funding source
Semnan University of Medical Sciences
Expected recruitment start date
2010-05-22, 1389/03/01
Expected recruitment end date
2010-12-30, 1389/10/09
Actual recruitment start date
empty
Actual recruitment end date
empty
Trial completion date
empty
Scientific title
The effect of Vibration on the muscle flexibility in female subjects with hamstring shortening: a randomized trial
Public title
Vibration may improve flexibility in subjects with hamstring shortening
Purpose
Treatment
Inclusion/Exclusion criteria
Inclusion criteria: more than 15 degree Hamesting shortening
Exclusion criteria: neuromuscular or musculoskeletal conditions, deformities and history of lower limb fractures
Age
From 18 years old to 22 years old
Gender
Female
Phase
4
Groups that have been masked
No information
Sample size
Target sample size:
30
Randomization (investigator's opinion)
Randomized
Randomization description
Blinding (investigator's opinion)
Not blinded
Blinding description
Placebo
Not used
Assignment
Parallel
Other design features
Secondary Ids
empty
Ethics committees
1
Ethics committee
Name of ethics committee
Semnan university of medical sciences
Street address
Deputy of education and research, Basij Boulevard
City
Semnan
Postal code
Approval date
2010-05-10, 1389/02/20
Ethics committee reference number
A/2412
Health conditions studied
1
Description of health condition studied
Muscle shortening
ICD-10 code
M62.4
ICD-10 code description
Contracture of muscle
Primary outcomes
1
Description
Passive knee extension angle
Timepoint
Before and after 8 weeks intervention
Method of measurement
The passive knee extension angle will be measured by hand-hold goniameter
Secondary outcomes
empty
Intervention groups
1
Description
In experimental group: local vibration is applied over the middle line of the posterior aspect of thigh as follows: first and second week: three sets of 20 secs (with 1 min rest); third and fourth week: three sessions of 30 secs with 1 min rest; fifth and sixth week: three sets of 45 secs (with 45 secs rest). Seventh and eighth week: 4 sets of 1 min (with 1 min rest)
Category
Rehabilitation
2
Description
In control group: No intervention was applied
Category
N/A
Recruitment centers
1
Recruitment center
Name of recruitment center
Musculoskeletal Rehabilitation Research Center
Full name of responsible person
Amir Hoshang Bakhtiary
Street address
Ghods Boulevard
City
Semnan
Sponsors / Funding sources
1
Sponsor
Name of organization / entity
Semnan University of Medical Sciences
Full name of responsible person
Dr Vahid Semnani
Street address
Deputy of Education and Research, Basij Boulevard
City
Semnan
Grant name
Grant code / Reference number
Is the source of funding the same sponsor organization/entity?
Yes
Title of funding source
Semnan University of Medical Sciences
Proportion provided by this source
100
Public or private sector
empty
Domestic or foreign origin
empty
Category of foreign source of funding
empty
Country of origin
Type of organization providing the funding
empty
Person responsible for general inquiries
Contact
Name of organization / entity
Semnan University of Medical Sciences
Full name of responsible person
Amir Hoshang Bakhtiary
Position
PhD in Physiotherapy/ Head of Rehabilitation Research Center
Other areas of specialty/work
Street address
Ghods Boulevard
City
Semnan
Postal code
Phone
+98 23 1333 2850
Fax
Email
amir822@yahoo.com
Web page address
Person responsible for scientific inquiries
Contact
Name of organization / entity
Semnan University of Medical Sciences
Full name of responsible person
Amir Hoshang Bakhtiary
Position
PhD in Physiotherapy/Head of Rehabilitation Research center
Other areas of specialty/work
Street address
Ghods Boulevard
City
Semnan
Postal code
Phone
+98 23 1333 2850
Fax
Email
amir822@yahoo.com
Web page address
Person responsible for updating data
Contact
Name of organization / entity
Semnan University of Medical sciences
Full name of responsible person
Amir Hoshang Bakhtiary
Position
Other areas of specialty/work
Street address
City
Postal code
Phone
Fax
Email
Web page address
Sharing plan
Deidentified Individual Participant Data Set (IPD)