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CTRI Number  CTRI/2025/08/093663 [Registered on: 26/08/2025] Trial Registered Prospectively
Last Modified On: 25/08/2025
Post Graduate Thesis  No 
Type of Trial  Interventional 
Type of Study   Physiotherapy (Not Including YOGA) 
Study Design  Randomized, Parallel Group, Active Controlled Trial 
Public Title of Study   Effect of different stretching techniques in male soccer players 
Scientific Title of Study   The acute effect of different hamstring muscle stretching methods on the risk of hamstring strain injuries among male soccer players using machine learning 
Trial Acronym  NIL 
Secondary IDs if Any  
Secondary ID  Identifier 
Nil  NIL 
 
Details of Principal Investigator or overall Trial Coordinator (multi-center study)  
Name  Sahar Zaidi 
Designation  Assistant Professor 
Affiliation  Jamia Hamdard 
Address  Room no 543, Jamia Hamdard, Dept of Physiotherapy, Mehrauli - Badarpur Rd, near Batra Hospital, Block D, Hamdard Nagar, New Delhi, Delhi 110062

South
DELHI
110062
India 
Phone  08178071369  
Fax    
Email  sahar@jamiahamdard.ac.in  
 
Details of Contact Person
Scientific Query  
Name  Sahar Zaidi 
Designation  Assistant Professor 
Affiliation  Jamia Hamdard 
Address  Room no 543, Jamia Hamdard, Dept of Physiotherapy, Mehrauli - Badarpur Rd, near Batra Hospital, Block D, Hamdard Nagar, New Delhi, Delhi 110062

South
DELHI
110062
India 
Phone  08178071369  
Fax    
Email  sahar@jamiahamdard.ac.in  
 
Details of Contact Person
Public Query  
Name  Sahar Zaidi 
Designation  Assistant Professor 
Affiliation  Jamia Hamdard 
Address  Room no 543, Jamia Hamdard, Dept of Physiotherapy, Mehrauli - Badarpur Rd, near Batra Hospital, Block D, Hamdard Nagar, New Delhi, Delhi 110062

South
DELHI
110062
India 
Phone  08178071369  
Fax    
Email  sahar@jamiahamdard.ac.in  
 
Source of Monetary or Material Support  
Rehabilitation centre, Jamia Hamdard.  
 
Primary Sponsor  
Name  none 
Address  NA 
Type of Sponsor  Other [] 
 
Details of Secondary Sponsor  
Name  Address 
Nil  Nil 
 
Countries of Recruitment     India  
Sites of Study  
No of Sites = 1  
Name of Principal Investigator  Name of Site  Site Address  Phone/Fax/Email 
Dr Sahar Zaidi  Jamia Hamdard  Room no 9, Rehabilitation Centre, Jamia Hamdard, Dept of Physiotherapy, Mehrauli - Badarpur Rd, near Batra Hospital, Block D, Hamdard Nagar, New Delhi, Delhi 110062
South
DELHI 		 08178071369

sahar@jamiahamdard.ac.in 
 
Details of Ethics Committee  
No of Ethics Committees= 1  
Name of Committee  Approval Status 
Jamia Hamdard Institutional Ethics Committee  Approved 
 
Regulatory Clearance Status from DCGI  
Status 
Not Applicable 
 
Health Condition / Problems Studied  
Health Type  Condition 
Healthy Human Volunteers  Soccer players 
 
Intervention / Comparator Agent  
Type  Name  Details 
Comparator Agent  Stretching  Static Stretching Protocol Participants will perform static stretches targeting the hamstring muscles, consisting of 4 repetitions of 15 seconds each. The stretches will involve holding the muscle in an elongated position without movement, to promote elongation without increasing injury risk. Dynamic Stretching Protocol Participants will perform dynamic stretches involving active leg swings into hip flexion, consisting of 4 repetitions of 15 seconds each. This protocol aims to warm up the muscles and increase range of motion while preparing them for physical activity. Ballistic Stretching Protocol Participants will perform ballistic stretches in a seated position, involving gentle bouncing motions while reaching forward towards the toes for 4 sets of 15 seconds each. This protocol is designed to push the muscle beyond its normal range of motion through repetitive bouncing movements. 
Intervention  Stretching Protocol  Static Stretching Protocol Participants will perform static stretches targeting the hamstring muscles, consisting of 4 repetitions of 15 seconds each. The stretches will involve holding the muscle in an elongated position without movement, to promote elongation without increasing injury risk. Dynamic Stretching Protocol Participants will perform dynamic stretches involving active leg swings into hip flexion, consisting of 4 repetitions of 15 seconds each. This protocol aims to warm up the muscles and increase range of motion while preparing them for physical activity. Ballistic Stretching Protocol Participants will perform ballistic stretches in a seated position, involving gentle bouncing motions while reaching forward towards the toes for 4 sets of 15 seconds each. This protocol is designed to push the muscle beyond its normal range of motion through repetitive bouncing movements.  
 
Inclusion Criteria  
Age From  18.00 Year(s)
Age To  30.00 Year(s)
Gender  Male 
Details  Male soccer players aged eighteen to thirty years
Participants with a history of regular soccer training at least three times per week
Participants diagnosed with or without hamstring shortness, based on a pre assessment sit and reach test
 
 
ExclusionCriteria 
Details  History of hamstring or other lower extremity injuries within the past six months
Current participation in any conflicting stretching or rehabilitation programs
Presence of any neurological or musculoskeletal disorders affecting lower limb function
Inability to perform the required stretching exercises due to other health conditions
 
 
Method of Generating Random Sequence   Computer generated randomization 
Method of Concealment   Sequentially numbered, sealed, opaque envelopes 
Blinding/Masking   Participant Blinded 
Primary Outcome  
Outcome  TimePoints 
Flexibility and Range of Motion
Muscle Strength
Power and Ballistic Function
Running and Agility Performance
 		 The study will take place over a period of three weeks, with each stretching protocol being tested on
three consecutive days with a 72-hour interval between sessions. 
 
Secondary Outcome  
Outcome  TimePoints 
Nil  Nil 
 
Target Sample Size   Total Sample Size="249"
Sample Size from India="249" 
Final Enrollment numbers achieved (Total)= "Applicable only for Completed/Terminated trials"
Final Enrollment numbers achieved (India)="Applicable only for Completed/Terminated trials" 
Phase of Trial   N/A 
Date of First Enrollment (India)   10/09/2025 
Date of Study Completion (India) Applicable only for Completed/Terminated trials 
Date of First Enrollment (Global)  10/09/2025 
Date of Study Completion (Global) Applicable only for Completed/Terminated trials 
Estimated Duration of Trial   Years="0"
Months="6"
Days="0" 
Recruitment Status of Trial (Global)   Not Yet Recruiting 
Recruitment Status of Trial (India)  Not Yet Recruiting 
Publication Details   N/A 
Individual Participant Data (IPD) Sharing Statement

Will individual participant data (IPD) be shared publicly (including data dictionaries)?  

Response - NO
Brief Summary  

This proposal outlines a randomized controlled trial investigating the acute effects of three hamstring stretching methods static, dynamic, and ballistic on flexibility, strength, power, and agility in male soccer players aged 18–30, with and without hamstring shortness. A total of 120 participants will be divided into two groups and tested at professional clubs in Iran, with each stretching protocol performed under supervision and evaluated using standardized tests such as sit-and-reach, dynamometry, sprint, and agility assessments. Data will be analyzed using traditional machine learning models (k-NN, decision trees, SVM, logistic regression, and neural networks) to predict the effectiveness of each method. The study aims to provide evidence-based insights into how different stretching protocols influence modifiable risk factors for hamstring strain injuries, supporting the development of targeted injury-prevention strategies for soccer players.

 
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