Strength EnduranceNCT07846605
Eccentric Versus Isometric Calf Training in Cricket Players
A study testing Isometric Training and Eccentric Training in people with Strength Endurance and Power, run by Ibadat International University, Islamabad at 1 site in Pakistan.
Trial summary
This study aims to compare the effect of isometric exercises and eccentric exercises on calf muscles in cricketers. The exercises will be evaluated for the effectiveness of calf muscle strength, power, and sprinting of the player and enhancing their performance. Read more about this study
- Who is it for?
- Ages 18 to 35 years, men onlyHealthy volunteers can take part
- Conditions the study is for
- Strength Endurance, Power, Sprint Performance
- What is being tested?
- Isometric Training and Eccentric Training
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 28 participants
- Where
- 1 sitePakistan
- Study dates
- 10 Sep 2026to 10 Jan 2028
- Phase
- Interventional
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 35 years
- Men only
- Healthy volunteers accepted
- Adult
Who may be able to join
- -In a male cricket player at club/provincial/national level; currently training ≥3 sessions/week (≥45 min each); aged 18-35; able to perform a unilateral calf raise pain-free; able to commit to the full 4-week program and both testing sessions.
Who cannot join
- Lower-limb injury in the past 3 months; any history of lower-limb surgery; neurological/vestibular/balance disorder; cardiovascular or metabolic condition contraindicating resistance training; concurrent plyometric/isometric/eccentric or sprint-specific program; use of ankle/knee bracing, orthotics, or heel lifts; use of anabolic steroids or performance-enhancing substances; current lower-limb pain or discomfort.
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
Pakistan1 site
Diamond Cricket Club, Islamabad, Pakistan
Islamabad
AbdulRehman noor, masters in physiotherapy, 03313333733, abody85220@gmail.com
About this study
Official title: Comparative Effects of Eccentric Versus Isometric Training on Strength, Power, and Sprint Performance in Calf Muscles for Cricketers
This study aims to compare the effect of isometric exercises and eccentric exercises on calf muscles in cricketers. The exercises will be evaluated for the effectiveness of calf muscle strength, power, and sprinting of the player and enhancing their performance.
- Conditions
- Strength Endurance, Power, Sprint Performance
- Being tested
- Isometric Training, Eccentric Training
- Keywords
- calf muscle, eccentric training, isometric training, sprint performance, cricket, plantar flexors
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Isometric TrainingOther
4-week progressive isometric calf-hold program at 90° (soleus) and 70° plantarflexion (gastrocnemius) angles, 3 sessions/week, intensity increasing from 60% to 80% MVIC
Eccentric TrainingOther
: 4-week progressive eccentric calf-raise program in knee-extended and knee-flexed positions, 3 sessions/week, reps and added load increasing weekly
| Study group | Role | What they receive |
|---|---|---|
| Group A - Isometric Training | Experimental | 4-week progressive isometric calf-hold program at 90° (soleus) and 70° plantarflexion (gastrocnemius) angles, 3 sessions/week, intensity increasing from 60% to 80% MVIC Receives: Other: Isometric Training |
| Group B - Eccentric Training | Experimental | 4-week progressive eccentric calf-raise program in knee-extended and knee-flexed positions, 3 sessions/week, reps and added load increasing weekly Receives: Other: Eccentric Training |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change in calf muscle strength
estimated 1RM via Brzycki formula, submaximal unilateral calf raise
Measured: Baseline (Week 0) and Week 4
Change in explosive power
standing long jump distance, cm
Measured: Baseline (Week 0) and Week 4
Change in sprint performance
10 m and 30 m sprint time, via My Sprint app
Measured: Baseline (Week 0) and Week 4
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted29 Sep 2026
- Study start10 Sep 2026 (estimated)
- Primary completion10 Dec 2027 (estimated)
- Study completion10 Jan 2028 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Strength EnduranceStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind
- Who is masked
- Participant, Outcomes assessor
- Enrolment
- 28 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Ibadat International University, Islamabad
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
- Investigators
- Dr Muhammad Ashar, PhD scholar, Principal investigator, ibadat international university
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07846605
- Sponsor's protocol ID
- IIUI/RERC/ADT/2026/08/415
- Status last verified
- Sep 2026
- First submitted
- 23 Sep 2026
- Last updated
- 29 Sep 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 29 Sep 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Comparative Effects of Eccentric Versus Isometric Training on Strength, Power, and Sprint Performance in Calf Muscles for Cricketers
- ClinicalTrials.gov ID
- NCT07846605
- Acronym / sponsor ID
- IIUI/RERC/ADT/2026/08/415
- Conditions
- Strength Endurance, Power, Sprint Performance
- Keywords
- calf muscle, eccentric training, isometric training, sprint performance, cricket, plantar flexors
- Study type
- Interventional
- Recruitment status
- Not yet recruiting
- Enrolment
- 28 participants (estimated)
- Lead sponsor
- Ibadat International University, IslamabadUniversity, hospital or other
- Study start
- 10 Sep 2026 (estimated)
- Primary completion
- 10 Dec 2027 (estimated)
- Study completion
- 10 Jan 2028 (estimated)
- First posted
- 29 Sep 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This study aims to compare the effect of isometric exercises and eccentric exercises on calf muscles in cricketers. The exercises will be evaluated for the effectiveness of calf muscle strength, power, and sprinting of the player and enhancing their performance.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind (participant, outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Group A - Isometric Training | Experimental | Other: Isometric Training4-week progressive isometric calf-hold program at 90° (soleus) and 70° plantarflexion (gastrocnemius) angles, 3 sessions/week, intensity increasing from 60% to 80% MVIC |
| Group B - Eccentric Training | Experimental | Other: Eccentric Training4-week progressive eccentric calf-raise program in knee-extended and knee-flexed positions, 3 sessions/week, reps and added load increasing weekly |
Who may qualify
- Ages
- 18 to 35 years
- Sex
- Male only
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (1 listed)
- -In a male cricket player at club/provincial/national level; currently training ≥3 sessions/week (≥45 min each); aged 18-35; able to perform a unilateral calf raise pain-free; able to commit to the full 4-week program and both testing sessions.
Key exclusion criteria (1 listed)
- Lower-limb injury in the past 3 months; any history of lower-limb surgery; neurological/vestibular/balance disorder; cardiovascular or metabolic condition contraindicating resistance training; concurrent plyometric/isometric/eccentric or sprint-specific program; use of ankle/knee bracing, orthotics, or heel lifts; use of anabolic steroids or performance-enhancing substances; current lower-limb pain or discomfort.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Isometric Training4-week progressive isometric calf-hold program at 90° (soleus) and 70° plantarflexion (gastrocnemius) angles, 3 sessions/week, intensity increasing from 60% to 80% MVIC | Other | Group A - Isometric Training |
| Eccentric Training: 4-week progressive eccentric calf-raise program in knee-extended and knee-flexed positions, 3 sessions/week, reps and added load increasing weekly | Other | Group B - Eccentric Training |
Primary outcome
Change in calf muscle strength
Time frame: Baseline (Week 0) and Week 4
estimated 1RM via Brzycki formula, submaximal unilateral calf raise
Change in explosive power
Time frame: Baseline (Week 0) and Week 4
standing long jump distance, cm
Change in sprint performance
Time frame: Baseline (Week 0) and Week 4
10 m and 30 m sprint time, via My Sprint app
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 29 Sep 2026.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
Dr Muhammad Ashar, PhD scholar principal investigator
ibadat international university
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Isometric Training and Eccentric Training in people with Strength Endurance and Power, run by Ibadat International University, Islamabad at 1 site in Pakistan.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: opening soon, as of the sponsor's last update on 29 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Pakistan. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact AbdulRehman noor, masters in physiotherapy (03313333733, abody85220@gmail.com), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Change in calf muscle strength (time frame: Baseline (Week 0) and Week 4). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 29 Sep 2026; AzTrials last refreshed its copy on 30 Oct 2026.