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CTRI Number  CTRI/2024/05/067525 [Registered on: 17/05/2024] Trial Registered Prospectively
Last Modified On: 19/03/2025
Post Graduate Thesis  Yes 
Type of Trial  Interventional 
Type of Study   Physiotherapy (Not Including YOGA) 
Study Design  Randomized, Parallel Group, Active Controlled Trial 
Public Title of Study   Advanced exercises to improve ankle stability and overall performance in volleyball players 
Scientific Title of Study   Effect of plyometric training on stability of ankle and overall performance in recreational volleyball players :A Randomized Controlled Trial 
Trial Acronym  NIL 
Secondary IDs if Any  
Secondary ID  Identifier 
NIL  NIL 
 
Details of Principal Investigator or overall Trial Coordinator (multi-center study)  
Name  Amulya Naresh Sirisilla 
Designation  Post graduate student  
Affiliation  NITTE INSTITUTE OF PHYSIOTHERAPY, NITTE DEEMED TO BE UNIVERSITY 
Address  Department of Physiotherapy Room No,20 Second Base Division Nitte Institute of Physiotherapy Nitte (Deemed to be University) Derlakatte, Mangaluru, India, Karnatakka

Dakshina Kannada
KARNATAKA
575018
India 
Phone  8433564217  
Fax    
Email  sirisillaamy66@gmail.com  
 
Details of Contact Person
Scientific Query
 
Name  Mr Rakesh Krishna Kovela 
Designation  Associate professor 
Affiliation  NITTE INSTITUTE OF PHYSIOTHERAPY, NITTE DEEMED TO BE UNIVERSITY 
Address  Department of Physiotherapy Room No,20 Second Base Division Nitte Institute of Physiotherapy Nitte (Deemed to be University) Derlakatte, Mangaluru, India, Karnatakka

Dakshina Kannada
KARNATAKA
575018
India 
Phone  7204346274  
Fax    
Email  rakesh.krishna@nitte.edu.in  
 
Details of Contact Person
Public Query
 
Name  Mr Rakesh Krishna Kovela 
Designation  Associate professor 
Affiliation  NITTE INSTITUTE OF PHYSIOTHERAPY, NITTE DEEMED TO BE UNIVERSITY 
Address  Department of Physiotherapy Room No,20 Second Base Division Nitte Institute of Physiotherapy Nitte (Deemed to be University) Derlakatte, Mangaluru, India, Karnatakka

Dakshina Kannada
KARNATAKA
575018
India 
Phone  7204346274  
Fax    
Email  rakesh.krishna@nitte.edu.in  
 
Source of Monetary or Material Support  
Nitte Institute of Physiotherapy, NITTE Deemed to be University ,Basic infrastructure support will be provided by Nitte Institute of Physiotherapy. No monetary support is required. 
 
Primary Sponsor  
Name  Nitte Institute of Physiotherapy 
Address  Department of Physiotherapy Room No,20 Second Base Division Nitte Institute of Physiotherapy Nitte (Deemed to be University) Derlakatte, Mangaluru, India Karnatakka  
Type of Sponsor  Other [Nitte Institute of Physiotherapy, Nitte deemed to be university] 
 
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 Rakesh Krishna Kovela  Justice K S Hegde Charitable Hospital, NITTE Deemed to be University  Department of Physiotherapy, Room number 20, Basement second floor, Justice K S Hegde charitable hospital, Deralakatte, Mangaluru, Karnataka, India.
Dakshina Kannada
KARNATAKA 
7204346274

rakesh.krishna@nitte.edu.in 
 
Details of Ethics Committee
Modification(s)  
No of Ethics Committees= 1  
Name of Committee  Approval Status 
Intitutional Ethics Committee of Nitte Institute of Physiotherapy  Approved 
 
Regulatory Clearance Status from DCGI  
Status 
Not Applicable 
 
Health Condition / Problems Studied  
Health Type  Condition 
Healthy Human Volunteers  Recreational Volleyball Players 
 
Intervention / Comparator Agent  
Type  Name  Details 
Intervention  Group A will be provided with (Plyometrics and conventional therapy)  Group A: Individuals will be trained with plyometric training along with conventional therapy. The list of plyometric exercises are: 1)Standing Vertical Jumps (10reps x 2sets) – Participant should be in standing position with feet separate about shoulder width apart. Come down into the squatting position by bending the knees while keeping the back straight and ask them to jump vertically up. While jumping, movement of hands is allowed. The participant should land in squatting position by maintaining balance on the feet. 2)Horizontal jumps (10reps x 2 set) – Participant should stand stationary with the toes aligned in level with the point marked on the ground and where they are instructed to jump forward as far as possible. Countermovement with arm and body swing is allowed for participants. While landing on feet the participant should maintain balance of the body. 3)Lateral hops (10reps x 2set) - Participant should be with feet not more than hip-width apart, bend your knees to squat straight down. Keep your weight on your heels. Shift weight from heels to toes as you begin your hops, quickly push upward and sideways toward the other side as alternative hops. 4)Ankle hops (10reps x 2set) – Participant should stand straight with feet of shoulder width apart. Place a cone on the ground. Ask the participants to jumps in front that is across the cone by maintaining balance of the body. 5)Single leg hoping (10reps x 2sets) – Participants should stand straight in neutral position with shoulder width apart and then bend at the knee on one leg and start hoping. Maintain balance while hoping. Hoping is done in same position for both the legs. Exercises are given for 20 min and after that rest period is of 15 min. Dynamic stretching(Conventional Therapy): 1)Hamstring stretch: Performed by standing on the ground with feet shoulder width apart and bending the trunk forward with the goal of contacting the right foot with the left hand and vice versa with a dynamic movement. 2)Gastrocnemius stretch: Individual takes one step forward while standing, while the knee of the leg in the back was fully extended. The dynamic stretch was induced by pushing the front knee forward. 3)Soleus stretch: Individual takes one step forward while standing, while the knee of the leg in the back was fully extended. Each stretching will be provided for 30sec of 3 sets for 15 min. Stretching will be given bilaterally for both the limbs. Entire session along with the conventional therapy will be of 35min along with 15 min rest period. Training for will be given for 3 days in a week alternatively for 3 weeks. 
Comparator Agent  Group B (Conventional therapy)  Group B: Individuals will be trained with dynamic stretching focusing on 3 muscles like gastrocnemius, hamstring and soleus muscle The list of stretching exercises which are provided are: 1)Hamstring stretch: Performed by standing on the ground with feet shoulder width apart and bending the trunk forward with the goal of contacting the right foot with the left hand and vice versa with a dynamic movement. 2)Gastrocnemius stretch: Individual takes one step forward while standing, while the knee of the leg in the back was fully extended. The dynamic stretch was induced by pushing the front knee forward. 3)Soleus stretch: Individual takes one step forward while standing, while the knee of the leg in the back was fully extended. Each stretching will be provided for 30sec of 3 sets for 15 min. Stretching will be given bilaterally for both the limbs.Training for will be given for 3 days in a week alternatively for 3 weeks. 
 
Inclusion Criteria  
Age From  18.00 Year(s)
Age To  25.00 Year(s)
Gender  Both 
Details  1.Recreational Volleyball players recruited from colleges of Nitte Deemed-to-be University
2.Male and female students of Age: 18-25 years
3.Recreational Volleyball Players with decreased ankle range of motion and strength 
 
ExclusionCriteria 
Details  Recreational Volleyball Players
1.With Fractures
2.Any recent lower limb and spinal injuries
3.Cardiorespiratory problems
4.Pain during medical and physical examination are excluded from the study
5.Players who play less than 3-4 times in a week 
 
Method of Generating Random Sequence   Random Number Table 
Method of Concealment   Sequentially numbered, sealed, opaque envelopes 
Blinding/Masking   Participant and Investigator Blinded 
Primary Outcome  
Outcome  TimePoints 
1.Dynamometer(Strength)
2.Inclinometer(Range)
3.Modified Dorsiflexion Lunge Test
4.Agility T Test 
2 times - on day 1 pre measurement and after 3 week of intervention post measurement(for all the outcomes) 
 
Secondary Outcome  
Outcome  TimePoints 
Nil  Nil 
 
Target Sample Size   Total Sample Size="42"
Sample Size from India="42" 
Final Enrollment numbers achieved (Total)= "42"
Final Enrollment numbers achieved (India)="42" 
Phase of Trial   Phase 2 
Date of First Enrollment (India)   01/07/2024 
Date of Study Completion (India) 02/02/2025 
Date of First Enrollment (Global)  Date Missing 
Date of Study Completion (Global) Date Missing 
Estimated Duration of Trial   Years="1"
Months="0"
Days="0" 
Recruitment Status of Trial (Global)   Not Applicable 
Recruitment Status of Trial (India)  Completed 
Publication Details
Modification(s)  
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)  
Recreational sport can be considered as both leisure activities and sports. Volleyball is played both indoors and outdoors. It involves combination of several physical qualities, particularly strength, speed, agility, and flexibility, which is essential for one who plays volleyball. A volleyball player performs powerful movements during the game, such as jumping, digging, spiking, blocking, striding, and also initiates multidirectional movements. Volleyball movements exert immense force on ankles, up to ten times body weight, raising injury risks. Factors like flexibility loss and muscle weakness worsen this. Repetitive landings can lead to functional ankle instability, emphasizing the need for strength, balance, and biomechanical awareness to prevent injuries. Lower extremity injuries, which constitute 50 of 60% of volleyball injuries, are predominantly ankle-related (47.4%), with non-contact traumatic incidents at 25.4% and overuse at 4.4%. Plyometric training has shown significant benefits for players, enhancing muscle strength, flexibility, agility, and overall athletic performance. It stimulates stretch reflexes, muscle activation, and neuromuscular control, improving joint proprioception during high-impact actions like jumping and landing, thus aiding injury prevention and performance enhancement. In addition, plyometric exercise helps in enhancing agility performance, which
requires both co-ordination and balance, which increases proprioceptive feedback. For better sports performance, training will be planned along with regular activity. The training technique which is provided consists of brief periods of rest intervals along with high-intensity activity with optimum repetition.  Training involves similar movements which increases endurance capacity of players so that muscle works on
its own pace according to movement. Recent evidence suggests that dynamic stretching enhances ankle flexibility, range, and motor task performance. Plyometric training has been shown to improve balance, flexibility, and functional performance in basketball and soccer players. The Agility T Test has proven effective in enhancing overall performance in various sports. However, the Modified Dorsiflexion Lunge Test, an ankle injury risk assessment tool, has been adequately utilized in studies. This research aims to use the Modified Dorsiflexion Lunge Test with an inclinometer to enhance ankle stability and reduce injury risk in recreational volleyball players. The study investigates the impact of plyometric training on ankle stability, focusing on strength, flexibility, and functional performance to reduce ankle injuries.
 
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