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Comparison of the effects of eight weeks of dynamic stretching and Nordic hamstring exercises on balance, flexibility, agility, and performance of male soccer players with hamstring shortness

Protocol summary

Study aim
An investigation of the effects of 8 weeks of dynamic stretching and Nordic hamstring exercise on balance, flexibility, agility, and performance of male football players with hamstring shortness
Design
The present study includes 60 participants and will be conducted as a single-blind, randomized controlled trial. Participants will be assigned to three groups, including dynamic hamstring stretching, Nordic hamstring exercise, and control, using simple randomization and the random allocation rule by drawing names from a hat.
Settings and conduct
In the present study, both the dynamic hamstring stretching and Nordic hamstring exercise groups will perform their interventions for a duration of 8 weeks, with five sessions per week, at the training facility location.
Participants/Inclusion and exclusion criteria
Participants must have a minimum of 3 years of regular sports experience in football. Additionally, they should not have experienced any lower limb injuries in the past six months. Furthermore, individuals who have had lower limb injuries or surgeries in the past 6 months, or have participated in an injury prevention program, are also excluded from the study.
Intervention groups
The present study includes three groups: dynamic hamstring stretching, Nordic hamstring exercise, and control. The first two groups will perform their intervention program for 8 weeks and five sessions per week, while the control group will not receive any intervention during this period.
Main outcome variables
The outcome variables of the present study are improvements in balance, flexibility, agility, and performance.

General information

Reason for update
Acronym
IRCT registration information
IRCT registration number: IRCT20230612058457N3
Registration date: 2024-04-07, 1403/01/19
Registration timing: registered_while_recruiting

Last update: 2024-04-07, 1403/01/19
Update count: 0
Registration date
2024-04-07, 1403/01/19
Registrant information
Name
Mohammad Alimoradi
Name of organization / entity
Shahid Bahonar University
Country
Iran (Islamic Republic of)
Phone
+98 34 2250 1685
Email address
malimoradi@sport.uk.ac.ir
Recruitment status
Recruitment complete
Funding source
Expected recruitment start date
2024-03-26, 1403/01/07
Expected recruitment end date
2024-05-27, 1403/03/07
Actual recruitment start date
empty
Actual recruitment end date
empty
Trial completion date
empty
Scientific title
Comparison of the effects of eight weeks of dynamic stretching and Nordic hamstring exercises on balance, flexibility, agility, and performance of male soccer players with hamstring shortness
Public title
Comparing the Effects of Two Exercise Protocols on Football Players with Hamstring Shortening
Purpose
Prevention
Inclusion/Exclusion criteria
Inclusion criteria:
Participants were required to have a minimum of three years of regular sports experience in football (three sessions per week). Participants should not have experienced any lower limb injuries in the past six months.
Exclusion criteria:
Participants must have a minimum of three years of sports experience in the field of football. Participants in the past six months may have suffered injuries in the lower extremity. Participants who have experienced lower limb injuries or surgeries in the past 6 months, or have participated in a injury prevention program.
Age
From 18 years old to 25 years old
Gender
Male
Phase
N/A
Groups that have been masked
  • Participant
Sample size
Target sample size: 60
Randomization (investigator's opinion)
Randomized
Randomization description
In the current study, participants are randomly assigned to three groups: dynamic stretching, Nordic hamstring, and control, through a chance draw where names are drawn from a hat.
Blinding (investigator's opinion)
Single blinded
Blinding description
After providing a general overview of the research and the participant groups to the participants, in the current study, participants are randomly assigned to three research groups: Dynamic Traction, Nordic Hamstring, and Control. None of the participants are aware of the intervention ratio and protocol performed by the other groups.
Placebo
Not used
Assignment
Parallel
Other design features

Secondary Ids

empty

Ethics committees

1

Ethics committee
Name of ethics committee
Ethics committee of Bu-Ali Sina University, Hamedan
Street address
Bu-Ali Sina University, Chaharbagh-e Shahid Mostafa Ahmadi Roshan, Hamedan
City
Hamedan
Province
Hamadan
Postal code
۶۵۱۷۸۳۸۶۹۵
Approval date
2024-02-26, 1402/12/07
Ethics committee reference number
IR.BASU.REC.1402.102

Health conditions studied

1

Description of health condition studied
Comparing two intervention programs on balance, flexibility, agility, and performance of football players with hamstring shortness.
ICD-10 code
ICD-10 code description

Primary outcomes

1

Description
In the present study, balance is being investigated.
Timepoint
8 weeks
Method of measurement
Balance is measured using the Y Balance Test.

2

Description
In the present study, flexibility is being investigated.
Timepoint
8 weeks
Method of measurement
Flexibility is assessed using the SLR (Straight Leg Raise) and sit and reach tests

3

Description
In the present study, agility is being investigated.
Timepoint
8 weeks
Method of measurement
َAgility is evaluated using the Illinois Agility Test

4

Description
In the present study, performance is being investigated.
Timepoint
8 weeks
Method of measurement
Performance is measured using the Counter Movement Jump test.

Secondary outcomes

empty

Intervention groups

1

Description
Intervention group: The dynamic hamstring stretch is performed with the individual standing on both feet. The target leg is fully extended from the hip joint and flexed towards the torso. This stretch is conducted at a speed of 60 beats per minute for a duration of 30 seconds, with three repetitions performed on each leg. It is worth mentioning that there is a 10-second rest period between each stretch.
Category
Prevention

2

Description
Intervention group: The Nordic hamstring protocol will be implemented as follows: In weeks 4-1, players will perform the Nordic exercise in the form of 2 sets of 5 repetitions. Since this exercise may vary in difficulty for different individuals, they can use an external aid such as a plate to ensure individualized training. Additionally, during weeks 8-5, the Nordic exercise will be performed in 3 sets of 5 repetitions. It is worth noting that there will be a 10-second rest period between each set for the participants.
Category
Prevention

3

Description
Control group: Does not receive any intervention
Category
Prevention

Recruitment centers

1

Recruitment center
Name of recruitment center
ُShahin Football Club
Full name of responsible person
Mohammad Alimoradi
Street address
Unit 6, Yekta Complex, 12th Alley, Fathali Shahi Street.
City
Kerman
Province
Kerman
Postal code
۷۶۱۴۸۱۶۹۶۱
Phone
+98 34 3225 0168
Email
malimoradi@sport.uk.ac.ir

Sponsors / Funding sources

1

Sponsor
Name of organization / entity
The University of Bu-Ali Sina
Full name of responsible person
Arash Ghorbani
Street address
The University of Bu-Ali, Shahid Fahmideh St, Hamedan
City
Hamedan
Province
Hamadan
Postal code
6517838695
Phone
+98 81 3140 5555
Email
a.ghorbani@yahoo.com
Grant name
Grant code / Reference number
Is the source of funding the same sponsor organization/entity?
Yes
Title of funding source
The University of Bu-Ali Sina
Proportion provided by this source
100
Public or private sector
Public
Domestic or foreign origin
Domestic
Category of foreign source of funding
empty
Country of origin
Type of organization providing the funding
Academic

Person responsible for general inquiries

Contact
Name of organization / entity
Shahid Bahonar University
Full name of responsible person
Mohammad Alimoradi
Position
Graduated Student
Latest degree
Master
Other areas of specialty/work
Sport Medicine
Street address
Unit 6, Yekta residential complex, Fathalishahi 12 St, Kerman, Iran
City
Kerman
Province
Kerman
Postal code
7614816961
Phone
+98 34 2250 1685
Fax
Email
malimoradi@sport.uk.ac.ir

Person responsible for scientific inquiries

Contact
Name of organization / entity
Shahid Bahonar University
Full name of responsible person
Mohammad Alimoradi
Position
Graduated Student
Latest degree
Master
Other areas of specialty/work
Sport Medicine
Street address
Unit 6, Yekta residential complex, Fathalishahi 12 St, Kerman, Iran
City
Kerman
Province
Kerman
Postal code
7614816961
Phone
+98 34 2250 1685
Fax
Email
malimoradi@sport.uk.ac.ir

Person responsible for updating data

Contact
Name of organization / entity
Shahid Bahonar University
Full name of responsible person
Mohammad Alimoradi
Position
Graduated Student
Latest degree
Master
Other areas of specialty/work
Sport Medicine
Street address
Unit 6, Yekta residential complex, Fathalishahi 12 St, Kerman, Iran
City
Kerman
Province
Kerman
Postal code
7614816961
Phone
+98 34 2250 1685
Fax
Email
malimoradi@sport.uk.ac.ir

Sharing plan

Deidentified Individual Participant Data Set (IPD)
No - There is not a plan to make this available
Justification/reason for indecision/not sharing IPD
According to the laws of ethics and protecting the privacy of individuals, access to this data is not possible.
Study Protocol
Yes - There is a plan to make this available
Statistical Analysis Plan
Yes - There is a plan to make this available
Informed Consent Form
Yes - There is a plan to make this available
Clinical Study Report
Not applicable
Analytic Code
Yes - There is a plan to make this available
Data Dictionary
Yes - There is a plan to make this available
Title and more details about the data/document
All data will be shared after anonymizing individuals, ensuring their non-identifiability.
When the data will become available and for how long
The data access period will start immeduately after the results are printed.
To whom data/document is available
The data will be made available to researchers, organizations, and institutions related to the field of football and also for publication in accessible journals.
Under which criteria data/document could be used
In order to assist scientific research and promote the implementation of executive goals with a focus on reducing musculoskeletal injuries and enhancing the performance of football players in the field,
From where data/document is obtainable
Mohammad Alimoradi/malimoradi@sport.uk.ac.ir
What processes are involved for a request to access data/document
Requests for access to data will be answered within a week
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