Intermittent Water IntakeNCT07710092
The Effects of Intermittent Water Consumption and Restriction on Serum Electrolyte Levels in Professional Football Players During Competition
A study testing Intermittent Plain Water Intake in people with Intermittent Water Intake, run by Selcuk University.
Trial summary
Background: In sports requiring intense physical exertion, particularly in endurance-based disciplines such as football, exercise-induced fluid and electrolyte losses can have adverse effects on thermoregulation, cardiovascular stability, and neuromuscular functions. Read more about this study
- Who is it for?
- Ages 18 years and older, men onlyHealthy volunteers can take part
- Conditions the study is for
- Intermittent Water Intake
- What is being tested?
- Intermittent Plain Water Intake
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 22 participants
- Where
- No sites listed yet
- Study dates
- 10 Jan 2016to 25 Jan 2016
- Phase
- Interventional
- Are there results?
- None posted in the registry
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 years and older
- Men only
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- Male professional football players.
- Actively playing for Anadolu Selçukspor in the Turkish Football Federation 2nd League.
- Training at a professional level.
- Having no reported health problems.
- Voluntary participation in the study.
- Providing written informed consent.
Who cannot join
- Having any health problem that could affect participation in the football match or study measurements.
- Having an injury or medical condition preventing participation in exercise.
- Refusal to participate or failure to provide written informed consent.
- Not completing the match protocol or pre- and post-competition measurements.
About this study
Background: In sports requiring intense physical exertion, particularly in endurance-based disciplines such as football, exercise-induced fluid and electrolyte losses can have adverse effects on thermoregulation, cardiovascular stability, and neuromuscular functions. Failure to balance these losses with adequate and timely rehydration increases the risk of performance decrement and injury. Although the literature indicates that intermittent and individualized fluid intake can mitigate these physiological effects, experimental studies conducted under field conditions with professional athletes remain limited. In this context, the purpose of this study is to evaluate the effects of intermittent water consumption administered during competition on exercise-induced changes in body weight and basic serum electrolyte levels (Na⁺, K⁺, Ca²⁺, Cl-) in professional football players.
Methods: Twenty-two male football players participated in the study and were randomly assigned to either the experimental (intermittent water intake, n=11) or control (ad libitum water intake, n=11) group. Both groups played a 90-minute match; body weight and serum electrolyte levels were measured before and after the competition. The experimental group was provided with a total of 10 mL/kg of plain water, administered before the match and at half-time.
- Conditions
- Intermittent Water Intake
- Being tested
- Intermittent Plain Water Intake
- Keywords
- Intermittent water intake, Professional football players, Serum electrolytes, Hydration strategy
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Intermittent Plain Water IntakeDietary supplement
Also called Hydration Protocol
Participants in the experimental group received plain water according to body weight. The total amount was calculated as 2 × 5 mL/kg and was administered in two equal doses: 15 minutes before the start of the football match and immediately after the first half. Water intake was directly observed and recorded.
| Study group | Role | What they receive |
|---|---|---|
| Intermittent Water Intake Group | Experimental | Participants in this arm received intermittent plain water intake during the football match. The total water volume was calculated according to body weight as 2 × 5 mL/kg and was administered in two equal doses: 15 minutes before the match and immediately after the first half. Receives: Dietary Supplement: Intermittent Plain Water Intake |
| Ad Libitum Water Intake Group | No intervention | Participants in this arm received no specific hydration guidance during the study and followed their natural thirst-driven drinking behavior throughout the football match. |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change in Serum Electrolyte Levels
Change in serum sodium, potassium, calcium, and chloride levels from before to after the 90-minute football match. Venous blood samples were collected before and immediately after the competition to evaluate exercise-induced changes in serum electrolyte balance.
Measured: Before and immediately after the 90-minute football match
Secondary outcomes (1)
Change in Body Weight
Change in body weight from before to after the 90-minute football match. Body weight was measured before and after the competition to estimate exercise-induced fluid loss.
Measured: Before and immediately after the 90-minute football match
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted17 Jul 2026
- Study start10 Jan 2016
- Primary completion25 Jan 2016
- Study completion25 Jan 2016
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Intermittent Water IntakeStudies of the same condition, open and under way.
- More trials run by Selcuk UniversityThe sponsor's other registered studies.
- 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
- Other
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 22 participants (actual)
Sponsor and investigators
- Lead sponsor
- Selcuk University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Suleyman Patlar, Selcuk University
- Investigators
- Süleyman Patlar, Prod. Dr., Principal investigator, Selcuk University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07710092
- Sponsor's protocol ID
- SU-FSS-2015-41
- Status last verified
- Jul 2026
- First submitted
- 9 Jul 2026
- Last updated
- 17 Jul 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Yes: De-identified individual participant data that support the findings of this study will be made available from the corresponding author upon reasonable request.
Study at a glance
From the registry record, last updated by the sponsor on 17 Jul 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Effects of Intermittent Water Consumption and Restriction on Serum Electrolyte Levels in Professional Football Players During Competition
- ClinicalTrials.gov ID
- NCT07710092
- Acronym / sponsor ID
- SU-FSS-2015-41
- Conditions
- Intermittent Water Intake
- Keywords
- Intermittent water intake, Professional football players, Serum electrolytes, Hydration strategy
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 22 participants (actual)
- Lead sponsor
- Selcuk UniversityUniversity, hospital or other
- Study start
- 10 Jan 2016 (actual)
- Primary completion
- 25 Jan 2016 (actual)
- Study completion
- 25 Jan 2016 (actual)
- First posted
- 17 Jul 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.
Background: In sports requiring intense physical exertion, particularly in endurance-based disciplines such as football, exercise-induced fluid and electrolyte losses can have adverse effects on thermoregulation, cardiovascular stability, and neuromuscular functions. Failure to balance these losses with adequate and timely rehydration increases the risk of performance decrement and injury. Although the literature indicates that intermittent and individualized fluid intake can mitigate these physiological effects, experimental studies conducted under field conditions with professional athletes remain limited. In this context, the purpose of this study is to evaluate the effects of intermittent water consumption administered during competition on exercise-induced changes in body weight and basic serum electrolyte levels (Na⁺, K⁺, Ca²⁺, Cl-) in professional football players.
Methods: Twenty-two male football players participated in the study and were randomly assigned to either the experimental (intermittent water intake, n=11) or control (ad libitum water intake, n=11) group. Both groups played a 90-minute match; body weight and serum electrolyte levels were measured before and after the competition. The experimental group was provided with a total of 10 mL/kg of plain water, administered before the match and at half-time.
Study design
- Primary purpose
- Other
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Intermittent Water Intake Group | Experimental | Dietary Supplement: Intermittent Plain Water IntakeParticipants in this arm received intermittent plain water intake during the football match. The total water volume was calculated according to body weight as 2 × 5 mL/kg and was administered in two equal doses: 15 minutes before the match and immediately after the first half. |
| Ad Libitum Water Intake Group | No intervention | –Participants in this arm received no specific hydration guidance during the study and followed their natural thirst-driven drinking behavior throughout the football match. |
Who may qualify
- Ages
- 18 years and older
- Sex
- Male only
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (6 listed)
- Male professional football players.
- Actively playing for Anadolu Selçukspor in the Turkish Football Federation 2nd League.
- Training at a professional level.
- Having no reported health problems.
- Voluntary participation in the study.
Key exclusion criteria (4 listed)
- Having any health problem that could affect participation in the football match or study measurements.
- Having an injury or medical condition preventing participation in exercise.
- Refusal to participate or failure to provide written informed consent.
- Not completing the match protocol or pre- and post-competition measurements.
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 |
|---|---|---|
| Intermittent Plain Water IntakeAlso: Hydration ProtocolParticipants in the experimental group received plain water according to body weight. The total amount was calculated as 2 × 5 mL/kg and was administered in two equal doses: 15 minutes before the start of the football match and immediately after the first half. Water intake was directly observed and recorded. | Dietary supplement | Intermittent Water Intake Group |
Primary outcome
Change in Serum Electrolyte Levels
Time frame: Before and immediately after the 90-minute football match
Change in serum sodium, potassium, calcium, and chloride levels from before to after the 90-minute football match. Venous blood samples were collected before and immediately after the competition to evaluate exercise-induced changes in serum electrolyte balance.
1 secondary outcome
Change in Body Weight
Time frame: Before and immediately after the 90-minute football match
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 17 Jul 2026.
- Individual participant dataSharing planned: Yes. De-identified individual participant data that support the findings of this study will be made available from the corresponding author upon reasonable request.
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. This study is not recruiting at the moment.
Süleyman Patlar, Prod. Dr. principal investigator
Selcuk University
Questions about this trial
What is this clinical trial studying?
A study testing Intermittent Plain Water Intake in people with Intermittent Water Intake, run by Selcuk University.
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 6 inclusion and 4 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: finished, as of the sponsor's last update on 17 Jul 2026. Status can change between updates, so confirm with the study contact before making plans.
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?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Change in Serum Electrolyte Levels (time frame: Before and immediately after the 90-minute football match). 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 17 Jul 2026.