Trial Review

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Trial registered on ANZCTR


Registration number
ACTRN12625000633482
Ethics application status
Approved
Date submitted
7/02/2025
Date registered
16/06/2025
Date last updated
16/06/2025
Date data sharing statement initially provided
16/06/2025
Type of registration
Retrospectively registered

Titles & IDs
Public title
To analyze the acute effects of beetroot juice supplementation on Special Judo Fitness Test (SJFT) performance in elite and non-elite judoka.
Scientific title
Acute Effects Of Beet Juice Supplementation On Specific Judo Fitness Test Performance
Secondary ID [1] 313916 0
None Known
Universal Trial Number (UTN)
Trial acronym
Linked study record

Health condition
Health condition(s) or problem(s) studied:
Fatigue 336606 0
recovery 337065 0
physical performance 337066 0
Condition category
Condition code
Musculoskeletal 333112 333112 0 0
Normal musculoskeletal and cartilage development and function

Intervention/exposure
Study type
Interventional
Description of intervention(s) / exposure
In this study, elite and non-elite judo athletes will be administered two measurements, red beet juice and placebo, one week apart.
Athletes will be randomly selected 2.5 hours before the measurement, elite judo athletes will be given 300 ml of freshly squeezed beetroot juice containing 8.4 mmol nitrate according to sources (Aydin 2019) and non-elite judo athletes (placebo) will be given a drink prepared by adding a minimum amount (50 ml) of red beetroot juice to 300 ml of pure In this study, elite and non-elite judo athletes will be administered two measurements, red beet juice and placebo, one week apart.
Athletes will be randomly selected 2.5 hours before the measurement, elite judo athletes will be given 300 ml of freshly squeezed beet juice containing 8.4 mmol nitrate according to sources (Aydin 2019). ing the Athletes will be instructed to consume the drink within 10 minutes. During the consumption of the drinks, consumption will be under the direct supervision of the researcher so that compliance will be monitored.
Intervention code [1] 330506 0
Treatment: Other
Comparator / control treatment
Athletes were randomly assigned to receive 300 ml of pure drinking water (placebo) containing a minimum amount (50 ml) of red beet juice according to the sources (Lansley et al. 2011), 2.5 hours before the measurement. One week later, the same subjects will be tested again with the same drink from the previous measurement 2.5 hours before the test. They will not be given another diet list. They will continue with their usual diet routine
Control group
Placebo

Outcomes
Primary outcome [1] 340652 0
Special Judo Fitness Test (SJFT) Score Index
Timepoint [1] 340652 0
Acute impact. 2.5 hours before and after the special judo fitness test
Secondary outcome [1] 447338 0
There are no secondary consequences
Timepoint [1] 447338 0
There are no secondary consequences

Eligibility
Key inclusion criteria
Elite judoka must have the blackest black belt and have at least 5 years of experience.
Non-elite judoka must have at least 3 years of experience.
Both groups of athletes must not have a chronic disease.
Athletes of both groups must not smoke, drink alcohol or use any narcotic substances.
Both groups of athletes should not consume drugs.
Minimum age
18 Years
Maximum age
35 Years
Sex
Both males and females
Can healthy volunteers participate?
Yes
Key exclusion criteria
None

Study design
Purpose of the study
Prevention
Allocation to intervention
Non-randomised trial
Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Masking / blinding
Blinded (masking used)
Who is / are masked / blinded?
The people receiving the treatment/s


Intervention assignment
Other design features
Phase
Not Applicable
Type of endpoint/s
Statistical methods / analysis
-Normality will be assessed by Shapiro-Wilk test.
-Levene's test will be used to assess the equality of variances.
-The assumption of sphericity will also be tested using Mauchly's test.
A two-way, repeated measures analysis of variance (ANOVA) for group (elite and non-elite athletes) × condition (PS and placebo) will be used to analyze each performance outcome.
In this study, G*Power 3.1.9.7 software was used to perform statistical power analysis. In order to determine the sample size, effect size, confidence interval and power value were taken into consideration. In line with the data obtained from previous similar studies, calculations were made with a moderate effect size (Cohen's d = 0.5), 95% confidence interval and 80% power (1-ß = 0.80). In the calculations based on ANOVA analysis for repeated measures, it was determined that a total of 39 individuals, 17 national athletes and 22 individuals engaged in recreational sports, would be sufficient. Therefore, 39 subjects (those who have been practicing judo for at least 5 years) will be included in the study.

Recruitment
Recruitment status
Completed
Date of first participant enrolment
Anticipated
Actual
24/02/2025
Date of last participant enrolment
Anticipated
Actual
24/03/2025
Date of last data collection
Anticipated
Actual
25/04/2025
Sample size
Target
40
Accrual to date
Final
39
Recruitment outside Australia
Country [1] 26872 0
Turkey
State/province [1] 26872 0
Istanbul

Funding & Sponsors
Funding source category [1] 318925 0
Self funded/Unfunded
Name [1] 318925 0
Unfunded
Country [1] 318925 0
Primary sponsor type
Individual
Name
Eda GÖKÇELIK
Address
Country
Turkey
Secondary sponsor category [1] 321394 0
None
Name [1] 321394 0
Address [1] 321394 0
Country [1] 321394 0

Ethics approval
Ethics application status
Approved
Ethics committee name [1] 317022 0
Istanbul Aydin Üniversitesi Girisimsel Olmayan Klinik Arastirmalar Etik Kurulu
Ethics committee address [1] 317022 0
Ethics committee country [1] 317022 0
Turkey
Date submitted for ethics approval [1] 317022 0
30/12/2024
Approval date [1] 317022 0
22/01/2025
Ethics approval number [1] 317022 0

Summary
Brief summary
Trial website
Trial related presentations / publications
Public notes

Contacts
Principal investigator
Name 139766 0
Ms Eda GÖKÇELIK
Address 139766 0
Istanbul Aydin University, Besyol, Inonu Cd. No:38, 34295 Kucukcekmece/Istanbul
Country 139766 0
Turkey
Phone 139766 0
+905448529208
Fax 139766 0
Email 139766 0
[email protected]
Contact person for public queries
Name 139767 0
Eda GÖKÇELIK
Address 139767 0
Istanbul Aydin University, Besyol, Inonu Cd. No:38, 34295 Kucukcekmece/Istanbul
Country 139767 0
Turkey
Phone 139767 0
+905448529208
Fax 139767 0
Email 139767 0
[email protected]
Contact person for scientific queries
Name 139768 0
Eda GÖKÇELIK
Address 139768 0
Istanbul Aydin University, Besyol, Inonu Cd. No:38, 34295 Kucukcekmece/Istanbul
Country 139768 0
Turkey
Phone 139768 0
+905448529208
Fax 139768 0
Email 139768 0
[email protected]

Data sharing statement
Will the study consider sharing individual participant data?
No


What supporting documents are/will be available?

TypeCitationLinkEmailOther DetailsAttachment
Ethical approval    182025Eda Gökçelik.pdf


Results publications and other study-related documents

Documents added manually
No documents have been uploaded by study researchers.

Documents added automatically
No additional documents have been identified.