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CTRI Number  CTRI/2025/09/094068 [Registered on: 01/09/2025] Trial Registered Prospectively
Last Modified On: 28/01/2026
Post Graduate Thesis  Yes 
Type of Trial  Interventional 
Type of Study   Physiotherapy (Not Including YOGA) 
Study Design  Non-randomized, Active Controlled Trial 
Public Title of Study   Effect of specific exercises on jump performance  
Scientific Title of Study   Effect of isometric training on tendon stiffness and jump performance in recreational athletes 
Trial Acronym  Nil  
Secondary IDs if Any  
Secondary ID  Identifier 
Nil  NIL 
 
Details of Principal Investigator or overall Trial Coordinator (multi-center study)  
Name  Raashi P Ranganath 
Designation  Post Graduate student 
Affiliation  Manipal College of Health Professions MAHE 
Address  Department of Exercise and Sports Science Manipal College of Health Professions MAHE Manipal Udupi Karnataka 576104 India

Udupi
KARNATAKA
576104
India 
Phone  8951194366  
Fax    
Email  raashi.mchpmpl2024@learner.manipal.edu  
 
Details of Contact Person
Scientific Query
 
Name  Dr Prabu Raja G 
Designation  Associate Professor 
Affiliation  Manipal College of Health Professions MAHE 
Address  Department of Exercise and Sports Science Manipal College of Health Professions MAHE Manipal Udupi Karnataka 576104 India

Udupi
KARNATAKA
576104
India 
Phone  8867591333  
Fax    
Email  prabu.raja@manipal.edu  
 
Details of Contact Person
Public Query
 
Name  Raashi P Ranganath 
Designation  Post Graduate student 
Affiliation  Manipal College of Health Professions MAHE 
Address  Department of Exercise and Sports Science Manipal College of Health Professions MAHE Manipal Udupi Karnataka 576104 India

Udupi
KARNATAKA
576104
India 
Phone  8951194366  
Fax    
Email  raashi.mchpmpl2024@learner.manipal.edu  
 
Source of Monetary or Material Support  
Center for sports medicine and research Department of Exercise and Sports Science Manipal College of Health professions Manipal Academy of Higher education Udupi Karnataka India 576104 
 
Primary Sponsor  
Name  Raashi P Ranganath 
Address  Department of Exercise and Sports Science Manipal College of Health Professions MAHE Manipal 
Type of Sponsor  Other [Other (self)] 
 
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 Prabu Raja G  Manipal Academy of Higher Education  center for sports science medicine and research Department of Exercise and Sports Science Manipal College of Health Professions MAHE Manipal Udupi Karnataka 576104 India
Udupi
KARNATAKA 
8867591333

prabu.raja@manipal.edu 
 
Details of Ethics Committee  
No of Ethics Committees= 1  
Name of Committee  Approval Status 
Karturba Medical college and Katurba Hospital Institutional ethics committee  Approved 
 
Regulatory Clearance Status from DCGI  
Status 
Not Applicable 
 
Health Condition / Problems Studied  
Health Type  Condition 
Healthy Human Volunteers  Recreational jumping and sprinting athletes 
 
Intervention / Comparator Agent  
Type  Name  Details 
Comparator Agent  Active control group - Plyometric training  consists of 4 different types of exercises ( Two feet ankle hop, box drills, squat jump, and depth jump). The active control intervention is for 6 weeks long, with three sessions per week a total of 18 supervised sessions. During the 1st and 2nd week 2sets of 10 reps with 22 inch box height , 3rd and 4th 3 sets of 10 reps with 24 inch box, 5th and 6th week 4 sets 10 reps with 26 inch box will the performed  
Intervention  Isometric training  consists of 2 exercises( isometric exercise for patellar tendon and isometric exercise for achilles tendon). The intervention is for 6 weeks long, with three sessions per week- a total of 18 supervised sessions. Each exercise will be performed for 4 reps and 5 sets per session . No progression will be given 
 
Inclusion Criteria  
Age From  18.00 Year(s)
Age To  35.00 Year(s)
Gender  Both 
Details  Recreational athletes involved in sprinting or jumping who have played the sport at least 2-4 hours per week for the last 6 months
Individuals should have engaged in weight training at least three times a week for a minimum of two months within the last six months 
 
ExclusionCriteria 
Details  Athletes with lower limb musculoskeletal pain and injuries
History of cardiovascular and respiratory diseases/ medical conditions
History of upper and lower extremities or spinal surgery in the past 1 year 
 
Method of Generating Random Sequence   Coin toss, Lottery, toss of dice, shuffling cards etc 
Method of Concealment   Sequentially numbered, sealed, opaque envelopes 
Blinding/Masking   Outcome Assessor Blinded 
Primary Outcome  
Outcome  TimePoints 
Jump performance
Tendon stiffness 
the outcome measures will be evaluated baseline and after 6 weeks of intervention 
 
Secondary Outcome  
Outcome  TimePoints 
NIL  Nil 
 
Target Sample Size   Total Sample Size="40"
Sample Size from India="40" 
Final Enrollment numbers achieved (Total)= "40"
Final Enrollment numbers achieved (India)="40" 
Phase of Trial   Phase 4 
Date of First Enrollment (India)   01/09/2025 
Date of Study Completion (India) 10/01/2026 
Date of First Enrollment (Global)  Date Missing 
Date of Study Completion (Global) Date Missing 
Estimated Duration of Trial   Years="0"
Months="7"
Days="0" 
Recruitment Status of Trial (Global)
Modification(s)  
Not Applicable 
Recruitment Status of Trial (India)  Completed 
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
Modification(s)  
This study is based on investigating the effect of isometric training on tendon stiffness and jump performance in recreational jumping and sprinting athletes( sports that involve jumping and landing during play, such as badminton, volleyball, tennis, long jump, and high jump, and sprinting sports )  . Participants will be screened based on the mentioned inclusion and exclusion criteria. Jump performance and tendon stiffness will be assessed using the Jump Performance application and Myoton Pro. The mentioned outcome measures will be collected, analyzed, and the interpretation of data will be documented, which will provide information about the performance profiling of the recreational sprinting and jumping athletes 
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