The Effect of Individual Sodium Citrate Consumption on Repeated Sprint Performance in Female Soccer Players
Trial statusNot yet recruiting
Trial phaseNot applicable
Trial typeInterventional
Biological sexFemale
Age18-25
SponsorHacettepe University
About this trial
The aim of this research is to determine whether sodium citrate supplementation, taken at the best individual time, would improve repeated sprint performance in professional female soccer players.
The main questions it aims to answer are:
1. Does sodium citrate improve sprint times, peak power, minimum power, and mean power during repeated sprints? 2. Does sodium citrate lower fatigue index (the drop in power across sprints) during repeated sprint exercise? 3. Does sodium citrate change blood bicarbonate, pH, and lactate levels before and after exercise? 4. Does sodium citrate affect how hard exercise feels (perceived exertion)?
Eligibility criteria
This trial accepts healthy volunteersQualifiers
Female professional soccer players competing in the Turkish Women's Third League
Age between 18-25 years
Active training status (minimum 3 sessions per week)
Regular menstrual cycles
Disqualifiers
Use of oral contraceptives
Irregular menstrual cycle
History of gastrointestinal disorders
Any musculoskeletal injury preventing maximal sprint performance
Trial design
Design model
Crossover
Treatments tested in this trial
Sodium Citrate Oral Product
Dietary supplement0.5 g/kg body weight of sodium citrate dissolved in flavored water, ingested orally. Exercise begins at individual peak blood bicarbonate time (T\_peak), determined through serial capillary blood sampling starting 90 minutes post-ingestion.
Placebo
Other interventionSodium chloride (NaCl) at a taste-matched dose dissolved in flavored water, ingested orally. Exercise begins 120-150 minutes post-ingestion.
Treatment groups
20 Participants
are divided into 2 treatment groupsGroup A: Sodium CitrateExperimental treatment 1 intervention
Group B: PlaceboExperimental treatment 1 intervention
Trial outcomes
Primary outcomes
1
Minimum Power
The lowest power output recorded across six maximal 35-meter sprints during the Running-based Anaerobic Sprint Test (RAST). Calculated as body weight (kg) multiplied by the square of sprint distance (m) divided by the cube of the slowest sprint time (s).
Time frame
Measured during the RAST test, administered immediately after the individualized ingestion-to-exercise interval (T_peak for sodium citrate; 120-150 minutes post-ingestion for placebo)2
Fatigue Index
The rate of power decline across six maximal 35-meter sprints during the Running-based Anaerobic Sprint Test (RAST). Calculated as the difference between peak power and minimum power divided by total sprint time (W/s).
Time frame
Measured during the RAST test, administered immediately after the individualized ingestion-to-exercise interval (T_peak for sodium citrate; 120-150 minutes post-ingestion for placebo)Secondary outcomes
1
Peak Power
The highest power output recorded across six maximal 35-meter sprints during the Running-based Anaerobic Sprint Test (RAST). Calculated as body weight (kg) multiplied by the square of sprint distance (m) divided by the cube of the fastest sprint time (s).
Time frame
Measured during the RAST test, administered immediately after the individualized ingestion-to-exercise interval (T_peak for sodium citrate; 120-150 minutes post-ingestion for placebo)2
Mean Power
The average power output recorded across six maximal 35-meter sprints during the Running-based Anaerobic Sprint Test (RAST). Calculated as the mean of all six individual sprint power values.
Time frame
Measured during the RAST test, administered immediately after the individualized ingestion-to-exercise interval (T_peak for sodium citrate; 120-150 minutes post-ingestion for placebo)3
Sprint Times
Individual sprint times recorded for each of the six maximal 35-meter sprints during the Running-based Anaerobic Sprint Test (RAST), measured in seconds using a photoelectric timing system.
Time frame
Measured during the RAST test, administered immediately after the individualized ingestion-to-exercise interval (T_peak for sodium citrate; 120-150 minutes post-ingestion for placebo)4
Blood Bicarbonate Concentration
Capillary blood bicarbonate concentration (HCO₃-, mmol/L) measured at baseline, pre-exercise, and post-exercise using a portable blood gas analyzer.
Time frame
Measured at baseline (pre-ingestion), pre-exercise (at T_peak for sodium citrate; 120-150 minutes post-ingestion for placebo), and at 1, 3, 5, and 7 minutes post-exercise.Locations
Sponsors and contacts
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Source ClinicalTrials.gov
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