Red color represents old content. It may be empty showing addition in the new version.
Green color represents new content. It may be empty showing deletion in the new version.
Inline
Side by side
Added new contents,
deleted old contents,contents that are not changed.
New table contents
New table contents
Old table contents
Old table contents
Unchanged contents
Unchanged contents
Added new contents, contents that are not changed.
Deleted old contents, contents that are not changed.
Old table contents
Old table contents
Unchanged contents
Unchanged contents
New table contents
New table contents
Unchanged contents
Unchanged contents
Protocol summary
Each participant will participate in 4 experimental sessions (following BR, caffeine, caffeine plus BR, placebo), completing 7 trials in each session (4 min of randori plus Sargent test plus back strength test plus grip strength test plus SJFT plus cognitive function). The study will be double-blinded and will be conducted in Ankara, Türkiye.
Each participant will participate in 4 experimental sessions (following BR, caffeine, caffeine plus BR, placebo), completing 5 trials in each session (4 min of randori plus SJFT plus CMJ test plus hand grip strength test plus cognitive function). The study will be double-blinded and will be conducted in Ankara, Türkiye.
Each participant will participate in 4 experimental sessions (following BR, caffeine, caffeine plus BR, placebo), completing 75 trials in each session (4 min of randori plus SargentSJFT plus CMJ test plus back strength test plushand grip strength test plus SJFT plus cognitive function). The study will be double-blinded and will be conducted in Ankara, Türkiye.
هر داوطلب در ۴ جلسه آزمایشی (بدنبال مصرف BR، کافئین، کافئین+BR، دارونما) شرکت خواهد کرد که در هر جلسه ۷ کارآزمایی را کامل خواهد (۴ دقیقه رندوری + تست سارجنت + تست قدرت پشت + تست قدرت پنجه دست + SJFT + عملکرد شناختی). این مطالعه از روش دوسوکور استفاده خواهد کرد و در آنکارا، ترکیه انجام خواهد شد.
هر داوطلب در ۴ جلسه آزمایشی (بدنبال مصرف BR، کافئین، کافئین+BR، دارونما) شرکت خواهد کرد که در هر جلسه 5 کارآزمایی را کامل خواهد (۴ دقیقه رندوری + SJFT + تست CMJ + تست قدرت پنجه دست + عملکرد شناختی). این مطالعه از روش دوسوکور استفاده خواهد کرد و در آنکارا، ترکیه انجام خواهد شد.
هر داوطلب در ۴ جلسه آزمایشی (بدنبال مصرف BR، کافئین، کافئین+BR، دارونما) شرکت خواهد کرد که در هر جلسه ۷5 کارآزمایی را کامل خواهد (۴ دقیقه رندوری + تست سارجنتSJFT + تست قدرت پشتCMJ + تست قدرت پنجه دست + SJFT + عملکرد شناختی). این مطالعه از روش دوسوکور استفاده خواهد کرد و در آنکارا، ترکیه انجام خواهد شد.
1) Beetroot juice consumption (from 2 days before the test: 2 times a day, 70 ml each time)
2) Caffeine consumption (on the day of the test: 3 times, 1 hour before the test and after the completion of the second and fourth attempts, each time 2 mg/kg of body weight)
3) Beetroot juice + caffeine consumption (beetroot juice: from 2 days before the test: 2 times a day, 70 ml each time; caffeine: on the day of the test: 3 times, 1 hour before the test and after the completion of the second and fourth attempts, each time 2 mg/kg of body weight)
4) Placebo consumption (consumption of 140 ml of water with red food coloring instead of beetroot juice and a capsule containing cellulose instead of caffeine)
1) Beetroot juice consumption (2 hours pre-exercise & immediately after the second trial, 70 ml each time);
2) Caffeine consumption (60 minutes pre-exercise and immediately after the third trial, each time 3 mg/kg of body weight);
3) Beetroot juice + caffeine consumption (beetroot juice: 2 hours pre-exercise & immediately after the second trial, 70 ml each time; caffeine: 60 minutes pre-exercise and immediately after the third trial, each time 3 mg/kg of body weight);
4) Placebo consumption (consumption of nitrate-depleted beetroot juice and opaque capsules containing 250 mg of sucrose as a placebo on an identical schedule).
1) Beetroot juice consumption (from 2 days beforehours pre-exercise & immediately after the test: 2 times a daysecond trial, 70 ml each time); 2) Caffeine consumption (on the day of the test: 3 times, 1 hour before the test60 minutes pre-exercise and immediately after the completion of the second and fourth attemptsthird trial, each time 23 mg/kg of body weight); 3) Beetroot juice + caffeine consumption (beetroot juice: from 2 days beforehours pre-exercise & immediately after the test: 2 times a daysecond trial, 70 ml each time; caffeine: on the day of the test: 3 times, 1 hour before the test60 minutes pre-exercise and immediately after the completion of the second and fourth attemptsthird trial, each time 23 mg/kg of body weight); 4) Placebo consumption (consumption of 140 ml of water with red food coloring instead ofnitrate-depleted beetroot juice and a capsuleopaque capsules containing cellulose instead250 mg of caffeinesucrose as a placebo on an identical schedule).
1) مصرف آب چغندر (از ۲ روز مانده به آزمایش: ۲ بار در روز، در هر بار ۷۰ میلی لیتر)
2) مصرف کافئین (روز آزمایش: ۳ بار، ۱ ساعت قبل از آزمایش و بعد از اتمام کوشش های دوم و چهارم، هر بار ۲ میلی گرم بر کیلوگرم وزن بدن)
3) مصرف آب چغندر + کافئین (آب چغندر: از ۲ روز مانده به آزمایش: ۲ بار در روز، در هر بار ۷۰ میلی لیتر؛ کافئین: روز آزمایش: ۳ بار، ۱ ساعت قبل از آزمایش و بعد از اتمام کوشش های دوم و چهارم، هر بار ۲ میلی گرم بر کیلوگرم وزن بدن)
4) مصرف دارونما (مصرف ۱۴۰ میلی لیتر آب با رنگ خوراکی قرمز بجای آب چغندر و کپسول حاوی سلولز بجای کافئین)
1) مصرف آب چغندر (2 ساعت قبل از ورزش و بلافاصله بعد از کوشش دوم، در هر بار ۷۰ میلی لیتر)؛
2) مصرف کافئین (60 دقیقه قبل از ورزش و بلافاصله بعد از کوشش سوم، هر بار 3 میلی گرم بر کیلوگرم وزن بدن)؛
3) مصرف آب چغندر + کافئین (آب چغندر: 2 ساعت قبل از ورزش و بلافاصله بعد از کوشش دوم، در هر بار ۷۰ میلی لیتر؛ کافئین: 60 دقیقه قبل از ورزش و بلافاصله بعد از کوشش سوم، هر بار 3 میلی گرم بر کیلوگرم وزن بدن)؛
4) مصرف دارونما (مصرف آب چغندر خالی از نیترات و کپسول مات حاوی سلولز بعنوان دارونما در زمانبندی یکسان).
1) مصرف آب چغندر (2 ساعت قبل از ۲ روز مانده به آزمایش: ۲ بار در روزورزش و بلافاصله بعد از کوشش دوم، در هر بار ۷۰ میلی لیتر)؛ 2) مصرف کافئین (روز آزمایش: ۳ بار، ۱ ساعت60 دقیقه قبل از آزمایشورزش و بلافاصله بعد از اتمام کوشش های دوم و چهارمسوم، هر بار ۲3 میلی گرم بر کیلوگرم وزن بدن)؛ 3) مصرف آب چغندر + کافئین (آب چغندر: 2 ساعت قبل از ۲ روز مانده به آزمایش: ۲ بار در روزورزش و بلافاصله بعد از کوشش دوم، در هر بار ۷۰ میلی لیتر؛ کافئین: روز آزمایش: ۳ بار، ۱ ساعت60 دقیقه قبل از آزمایشورزش و بلافاصله بعد از اتمام کوشش های دوم و چهارمسوم، هر بار ۲3 میلی گرم بر کیلوگرم وزن بدن)؛ 4) مصرف دارونما (مصرف ۱۴۰ میلی لیتر آب با رنگ خوراکی قرمز بجای آب چغندر خالی از نیترات و کپسول مات حاوی سلولز بجای کافئینبعنوان دارونما در زمانبندی یکسان).
SJFT index، Cognitive function
SJFT outcomes، Cognitive function
SJFT indexoutcomes، Cognitive function
شاخص SJFT، عملکرد شناختی
نتایجSJFT، عملکرد شناختی
شاخص SJFTنتایجSJFT، عملکرد شناختی
General information
Male
Both
maleboth
empty
Adding some secondary variables to evaluate possible mechanisms;
Using both sexes as subjects;
Adding some secondary variables to evaluate possible mechanisms; Using both sexes as subjects;
empty
افزودن برخی متغیرهای ثانویه برای اندازه گیری سازوکارهای احتمالی؛
بکارگیری هر دو جنس به عنوان آزمودنی؛
افزودن برخی متغیرهای ثانویه برای اندازه گیری سازوکارهای احتمالی؛ بکارگیری هر دو جنس به عنوان آزمودنی؛
All male judokas between the ages of 18 and 25.
Have a training history of more than 5 years.
Have at least a brown belt in judo.
Do not smoke.
Do not drink alcohol.
Have a daily caffeine intake of less than 100 mg.
All male judokas between the ages of 18 and 30.
Have a training history of more than 5 years.
Have at least a brown belt in judo.
Do not smoke.
Do not drink alcohol.
Have a daily caffeine intake of less than 100 mg.
All male judokas between the ages of 18 and 2530. Have a training history of more than 5 years. Have at least a brown belt in judo. Do not smoke. Do not drink alcohol. Have a daily caffeine intake of less than 100 mg.
کلیه جودوکاران مرد که سن آنان بین 18 الی 25 سال باشد.
دارای سابقه تمرینی بالای ۵ سال باشند.
دارای حداقل کمربند قهوه ای در جودو باشند.
مصرف دخانیات نداشته باشند.
مصرف الکل نداشته باشند.
مصرف روزانه کافئین کمتر از ۱۰۰ میلی گرم داشته باشند.
کلیه جودوکاران مرد که سن آنان بین 18 الی 30 سال باشد.
دارای سابقه تمرینی بالای ۵ سال باشند.
دارای حداقل کمربند قهوه ای در جودو باشند.
مصرف دخانیات نداشته باشند.
مصرف الکل نداشته باشند.
مصرف روزانه کافئین کمتر از ۱۰۰ میلی گرم داشته باشند.
کلیه جودوکاران مرد که سن آنان بین 18 الی 2530 سال باشد. دارای سابقه تمرینی بالای ۵ سال باشند. دارای حداقل کمربند قهوه ای در جودو باشند. مصرف دخانیات نداشته باشند. مصرف الکل نداشته باشند. مصرف روزانه کافئین کمتر از ۱۰۰ میلی گرم داشته باشند.
Primary outcomes
#1
In the 7 stages after judo randori
In the 6 stages after judo randori
In the 76 stages after judo randori
در 7 مرحله بعد از رندوری جودو
در 6 مرحله بعد از رندوری جودو
در 76 مرحله بعد از رندوری جودو
#2
In the 7 stages after judo randori
At baseline and after SJFT
In the 7 stagesAt baseline and after judo randoriSJFT
در 7 مرحله بعد از رندوری جودو
در حالت پایه و بعد از SJFT
در 7 مرحلهحالت پایه و بعد از رندوری جودوSJFT
Using the Stroop and Flanker tests
Using the Psychomotor Vigilance Test
Using the Stroop and Flanker testsPsychomotor Vigilance Test
با استفاده از آزمون های استروپ و فلانکر
با استفاده از آزمون روانی-حرکتی هوشیاری
با استفاده از آزمون های استروپ و فلانکرروانی-حرکتی هوشیاری
Secondary outcomes
#1
In the 7 stages after judo randori
In the 6 stages after SJFT
In the 76 stages after judo randoriSJFT
در 7 مرحله بعد از رندوری جودو
در 6 مرحله بعد از SJFT
در 76 مرحله بعد از رندوری جودوSJFT
#2
In the 7 stages after judo randori, immediately at the end of SJFT and 1 minute after SJFT
In the 6 stages immediately at the end of SJFT and 1 minute after SJFT
In the 76 stages after judo randori, immediately at the end of SJFT and 1 minute after SJFT
در 7 مرحله بعد از رندوری جودو، بلافاصله پس از SJFT و یک دقیقه بعد از SJFT
در 6 مرحله بلافاصله پس از SJFT و یک دقیقه بعد از SJFT
در 76 مرحله بعد از رندوری جودو، بلافاصله پس از SJFT و یک دقیقه بعد از SJFT
#3
In the 7 stages after judo randori
In the 6 stages after SJFT
In the 76 stages after judo randoriSJFT
در 7 مرحله بعد از رندوری جودو
در 6 مرحله بعد از SJFT
در 76 مرحله بعد از رندوری جودوSJFT
#4
Lower body explosive power
Jump height
Lower body explosive powerJump height
توان انفجاری پایین تنه
ارتفاع پرش
توان انفجاری پایین تنهارتفاع پرش
In the 7 stages after judo randori
In the 6 stages (pre-exercise and after SJFT)
In the 76 stages (pre-exercise and after judo randoriSJFT)
در 7 مرحله بعد از رندوری جودو
در 6 مرحله (پیش آزمون و بعد از SJFT)
در 76 مرحله (پیش آزمون و بعد از رندوری جودوSJFT)
Sargent Jump Test
CMJ Test
Sargent JumpCMJ Test
آزمون پرش سارجنت
آزمون پرش حرکت معکوس (CMJ)
آزمون پرش سارجنتحرکت معکوس (CMJ)
#5
In the 7 stages after judo randori
In the 6 stages (pre-exercise and after SJFT)
In the 76 stages (pre-exercise and after judo randoriSJFT)
در 7 مرحله بعد از رندوری جودو
در 6 مرحله (پیش آزمون و بعد از SJFT)
در 76 مرحله (پیش آزمون و بعد از رندوری جودوSJFT)
Isometric strength testing device for back and hand muscles
Isometric strength testing device for hand muscles
Isometric strength testing device for back and hand muscles
دستگاه سنجش قدرت ایزومتریک عضلات پشت و پنجه دست
دستگاه سنجش قدرت ایزومتریک پنجه دست
دستگاه سنجش قدرت ایزومتریک عضلات پشت و پنجه دست
#6
In the 7 stages after judo randori
At baseline, pre-exercise, mid-exercise, pre-final SJFT and post-exercise.
In the 7 stages after judo randoriAt baseline, pre-exercise, mid-exercise, pre-final SJFT and post-exercise.
در 7 مرحله بعد از رندوری جودو
در پایه، قبل از ورزش، وسط ورزش، قبل از SJFT نهایی، و پس از ورزش.
در 7 مرحله بعدپایه، قبل از رندوری جودوورزش، وسط ورزش، قبل از SJFT نهایی، و پس از ورزش.
Lactometer
Via Enzyme-Linked Immunosorbent Assay
LactometerVia Enzyme-Linked Immunosorbent Assay
لاکتومتر
با استفاده از جذب ایمنی متصل به آنزیم
لاکتومتربا استفاده از جذب ایمنی متصل به آنزیم
#7
empty
Muscle oxygenation
Muscle oxygenation
empty
اکسیژن رسانی عضلانی
اکسیژن رسانی عضلانی
empty
During the final SJFT
During the final SJFT
empty
در طول آخرین SJFT
در طول آخرین SJFT
empty
Near-infrared spectroscopy
Near-infrared spectroscopy
empty
طیف سنجی اشعه مادون قرمز-نزدیک
طیف سنجی اشعه مادون قرمز-نزدیک
#8
empty
Blood glucose
Blood glucose
empty
گلوکز خون
گلوکز خون
empty
At baseline, pre-exercise, mid-exercise, pre-final SJFT and post-exercise.
At baseline, pre-exercise, mid-exercise, pre-final SJFT and post-exercise.
empty
در پایه، قبل از ورزش، وسط ورزش، قبل از SJFT نهایی، و پس از ورزش.
در پایه، قبل از ورزش، وسط ورزش، قبل از SJFT نهایی، و پس از ورزش.
empty
Via hexokinase method
Via hexokinase method
empty
با استفاده از روش هگزوکیناز
با استفاده از روش هگزوکیناز
#9
empty
Plasma nitrate and nitrite
Plasma nitrate and nitrite
empty
نیترات و نیتریت پلاسمایی
نیترات و نیتریت پلاسمایی
empty
At baseline, pre-exercise, mid-exercise, pre-final SJFT and post-exercise.
At baseline, pre-exercise, mid-exercise, pre-final SJFT and post-exercise.
empty
در پایه، قبل از ورزش، وسط ورزش، قبل از SJFT نهایی، و پس از ورزش.
در پایه، قبل از ورزش، وسط ورزش، قبل از SJFT نهایی، و پس از ورزش.
empty
Via chemiluminescence assay
Via chemiluminescence assay
empty
با روش ارزیابی نورتابی شیمیایی
با روش ارزیابی نورتابی شیمیایی
#10
empty
Blood caffeine
Blood caffeine
empty
کافئین خون
کافئین خون
empty
At baseline, pre-exercise, mid-exercise, pre-final SJFT and post-exercise.
At baseline, pre-exercise, mid-exercise, pre-final SJFT and post-exercise.
empty
در پایه، قبل از ورزش، وسط ورزش، قبل از SJFT نهایی، و پس از ورزش.
در پایه، قبل از ورزش، وسط ورزش، قبل از SJFT نهایی، و پس از ورزش.
empty
Via High-Performance Liquid Chromatography
Via High-Performance Liquid Chromatography
empty
با روش کروماتوگرافی مایع با عملکرد بالا
با روش کروماتوگرافی مایع با عملکرد بالا
#11
empty
blood PH
blood PH
empty
اسیدیته خون
اسیدیته خون
empty
At baseline and post-exercise
At baseline and post-exercise
empty
در پایه و پس از ورزش
در پایه و پس از ورزش
empty
Blood gas analyzer
Blood gas analyzer
empty
تجزیه و تحلیل کننده گازهای خون
تجزیه و تحلیل کننده گازهای خون
Protocol summary
Study aim
Investigating the effect of caffeine, beetroot juice, and their combination on judo-specific performance in simulated conditions of the competition day in judo athletes
Design
A crossover, placebo-controlled, double-blind, randomized, phase 3 clinical trial on 35 judo athletes. The RAND function of Excel software will be used for randomization.
Settings and conduct
Each participant will participate in 4 experimental sessions (following BR, caffeine, caffeine plus BR, placebo), completing 5 trials in each session (4 min of randori plus SJFT plus CMJ test plus hand grip strength test plus cognitive function). The study will be double-blinded and will be conducted in Ankara, Türkiye.
Participants/Inclusion and exclusion criteria
Inclusion criteria: Must have at least a brown belt in judo; must not smoke; must not drink alcohol; must have a daily caffeine intake of less than 100 mg.
Exclusion criteria: Must have any injury or illness; must be taking any supplements or medications.
Intervention groups
1) Beetroot juice consumption (2 hours pre-exercise & immediately after the second trial, 70 ml each time);
2) Caffeine consumption (60 minutes pre-exercise and immediately after the third trial, each time 3 mg/kg of body weight);
3) Beetroot juice + caffeine consumption (beetroot juice: 2 hours pre-exercise & immediately after the second trial, 70 ml each time; caffeine: 60 minutes pre-exercise and immediately after the third trial, each time 3 mg/kg of body weight);
4) Placebo consumption (consumption of nitrate-depleted beetroot juice and opaque capsules containing 250 mg of sucrose as a placebo on an identical schedule).
Main outcome variables
SJFT outcomes، Cognitive function
General information
Reason for update
Adding some secondary variables to evaluate possible mechanisms;
Using both sexes as subjects;
Acronym
IRCT registration information
IRCT registration number:IRCT20231004059615N5
Registration date:2025-07-18, 1404/04/27
Registration timing:prospective
Last update:2026-01-18, 1404/10/28
Update count:1
Registration date
2025-07-18, 1404/04/27
Registrant information
Name
Davar Khodadadi
Name of organization / entity
Country
Iran (Islamic Republic of)
Phone
+98 21 2263 3583
Email address
davar.khodadadi@yahoo.com
Recruitment status
Recruitment complete
Funding source
Expected recruitment start date
2025-07-23, 1404/05/01
Expected recruitment end date
2025-07-27, 1404/05/05
Actual recruitment start date
empty
Actual recruitment end date
empty
Trial completion date
empty
Scientific title
The effect of caffeine and beetroot juice supplementation on specific judo performance during simulated competition-day conditions in judo athletes
Public title
Effect of caffeine and beetroot juice supplementation on specific judo performance
Purpose
Other
Inclusion/Exclusion criteria
Inclusion criteria:
All male judokas between the ages of 18 and 30.
Have a training history of more than 5 years.
Have at least a brown belt in judo.
Do not smoke.
Do not drink alcohol.
Have a daily caffeine intake of less than 100 mg.
Exclusion criteria:
Have any illness or injury in the past 3 months
Take any medication or nutritional supplement in the past 3 months
Age
From 18 years old to 30 years old
Gender
Both
Phase
3
Groups that have been masked
Participant
Investigator
Data analyser
Sample size
Target sample size:
24
Randomization (investigator's opinion)
Randomized
Randomization description
The names of the subjects will be entered in one column of Excel; in another column, each subject will be randomly assigned a number using the RAND function (=RAND()); then, the numbers will be sorted from smallest to largest; 25% of the subjects will receive Intervention 1 (caffeine supplement), 25% of the subjects will receive Intervention 2 (beetroot juice supplement), 25% of the subjects will receive Intervention 3 (caffeine + beetroot juice), and the remaining 25% will receive placebo. In the second to fourth sessions of the experiment, the subjects will be switched (for example, subjects who received Intervention 1 in the first session will be randomly assigned to Intervention 2, 3, or placebo in the second session).
Blinding (investigator's opinion)
Double blinded
Blinding description
The order in which the beetroot juice supplement or placebo was administered will be determined by one outside the study and will not be disclosed to participants or researchers until after the data analysis. Participants will also receive the supplements and placebo in a capsule (caffeine) and a bottle (beetroot juice) that are opaque and look similar. In addition, the color and taste of the placebo will be simulated by adding food coloring and flavoring to the supplement.
Placebo
Used
Assignment
Crossover
Other design features
Secondary Ids
empty
Ethics committees
1
Ethics committee
Name of ethics committee
Ethics Committee of the International Science and Technology University
Street address
Tunahan Mah. Dumlupinar 30 Agustos Cad. No:2, Metromal Business F Blok Office
City
Ankara
Postal code
21,06824
Approval date
2025-07-03, 1404/04/12
Ethics committee reference number
202507-01
Health conditions studied
1
Description of health condition studied
Improve exercise performance
ICD-10 code
ICD-10 code description
Primary outcomes
1
Description
SJFT index
Timepoint
In the 6 stages after judo randori
Method of measurement
Using the following formula: SJFT index = HR0 + HR1 / total number of throws
2
Description
Cognitive function
Timepoint
At baseline and after SJFT
Method of measurement
Using the Psychomotor Vigilance Test
Secondary outcomes
1
Description
Number of throws
Timepoint
In the 6 stages after SJFT
Method of measurement
Counting the number
2
Description
Heart rate
Timepoint
In the 6 stages immediately at the end of SJFT and 1 minute after SJFT
Method of measurement
Using a Polar heart rate monitor
3
Description
Rate of perceived exertion
Timepoint
In the 6 stages after SJFT
Method of measurement
Using the Borg scale
4
Description
Jump height
Timepoint
In the 6 stages (pre-exercise and after SJFT)
Method of measurement
CMJ Test
5
Description
Muscular strength
Timepoint
In the 6 stages (pre-exercise and after SJFT)
Method of measurement
Isometric strength testing device for hand muscles
6
Description
Blood lactate
Timepoint
At baseline, pre-exercise, mid-exercise, pre-final SJFT and post-exercise.
Method of measurement
Via Enzyme-Linked Immunosorbent Assay
7
Description
Muscle oxygenation
Timepoint
During the final SJFT
Method of measurement
Near-infrared spectroscopy
8
Description
Blood glucose
Timepoint
At baseline, pre-exercise, mid-exercise, pre-final SJFT and post-exercise.
Method of measurement
Via hexokinase method
9
Description
Plasma nitrate and nitrite
Timepoint
At baseline, pre-exercise, mid-exercise, pre-final SJFT and post-exercise.
Method of measurement
Via chemiluminescence assay
10
Description
Blood caffeine
Timepoint
At baseline, pre-exercise, mid-exercise, pre-final SJFT and post-exercise.
Method of measurement
Via High-Performance Liquid Chromatography
11
Description
blood PH
Timepoint
At baseline and post-exercise
Method of measurement
Blood gas analyzer
Intervention groups
1
Description
Intervention group1: Beetroot juice supplement (BEET It Sport®; James White Drinks Ltd., Ipswich, UK); 2 days before the test: 2 servings, 70 ml each, containing approximately 6.4 mmol nitrate;1 day before the test: 2 servings, 70 ml each, containing approximately 6.4 mmol nitrate;Test day: 2 servings, 2 hours before the test and after the second randori, 70 ml, containing approximately 6.4 mmol nitrate.
Category
Other
2
Description
Intervention group 2: Caffeine supplement (Caffeine®, Olimp Laboratories, Poland); Test day: 3 servings, 1 hour before the test and after the second and fourth attempts, 2 mg/kg body weight each.
Category
Other
3
Description
Intervention group 3: Beetroot juice supplement (BEET It Sport®; James White Drinks Ltd., Ipswich, UK); 2 days before the test: 2 servings, each 70 ml, containing approximately 6.4 mmol nitrate; 1 day before the test: 2 servings, each 70 ml, containing approximately 6.4 mmol nitrate; Test day: 2 servings, 2 hours before the test and after the second attempt, 70 ml, containing approximately 6.4 mmol nitrate. Caffeine supplement (Caffeine®, Olimp Laboratories, Poland); Test day: 3 servings, 1 hour before the test and after the second and fourth attempts, 2 mg/kg body weight each
Category
Other
4
Description
Control group: Similar to the intervention condition, they will receive placebo (colored water instead of beetroot juice and a capsule containing cellulose instead of caffeine).
Category
Other
Recruitment centers
1
Recruitment center
Name of recruitment center
INTERNATIONAL SCIENCE AND TECHNOLOGY UNIVERSITY
Full name of responsible person
Heidar Sajedi
Street address
Tunahan Mah. Dumlupinar 30 Agustos Cad. No:2, Metromal Business F Blok Office
City
Ankara
Postal code
21,06824
Phone
+90 312 475 76 15
Email
heidar.sajedi@istu.edu.pl
Sponsors / Funding sources
1
Sponsor
Name of organization / entity
INTERNATIONAL SCIENCE AND TECHNOLOGY UNIVERSITY
Full name of responsible person
Erdal Dursun
Street address
Tunahan Mah., Dumlupinar 30 Agustos Cad. No. 2, Metromal Business F Blok Office
City
Ankara
Postal code
21,06824
Phone
+90 312 475 76 15
Email
heidar.sajedi@istu.edu.pl
Grant name
Grant code / Reference number
Is the source of funding the same sponsor organization/entity?
Yes
Title of funding source
INTERNATIONAL SCIENCE AND TECHNOLOGY UNIVERSITY
Proportion provided by this source
100
Public or private sector
Private
Domestic or foreign origin
Foreign
Category of foreign source of funding
Sponsor: country of origin
Country of origin
IR
Type of organization providing the funding
Persons
Person responsible for general inquiries
Contact
Name of organization / entity
Islamic Azad University
Full name of responsible person
Davar Khodadadi
Position
Assistant professor
Latest degree
Ph.D.
Other areas of specialty/work
Physiology
Street address
Faculty of Physical Education and Sports Sciences, Velayat University Complex, Shahid Sohani St., Sohank
City
Tehran
Province
Tehran
Postal code
1955847781
Phone
+98 21 2263 3583
Fax
Email
davar.khodadadi@yahoo.com
Person responsible for scientific inquiries
Contact
Name of organization / entity
Islamic Azad University
Full name of responsible person
Davar Khodadadi
Position
Assistant professor
Latest degree
Ph.D.
Other areas of specialty/work
Physiology
Street address
Faculty of Physical Education and Sports Sciences, Velayat University Complex, Shahid Sohani St., Sohank
City
Tehran
Province
Tehran
Postal code
1955847781
Phone
+98 21 2263 3583
Fax
Email
davar.khodadadi@yahoo.com
Person responsible for updating data
Contact
Name of organization / entity
Islamic Azad University
Full name of responsible person
Davar Khodadadi
Position
Assistant professor
Latest degree
Ph.D.
Other areas of specialty/work
Physiology
Street address
Faculty of Physical Education and Sports Sciences, Velayat University Complex, Shahid Sohani St., Sohank
City
Tehran
Province
Tehran
Postal code
1955847781
Phone
+98 21 2263 3583
Fax
Email
davar.khodadadi@yahoo.com
Sharing plan
Deidentified Individual Participant Data Set (IPD)
Yes - There is a plan to make this available
Study Protocol
Yes - There is a plan to make this available
Statistical Analysis Plan
Undecided - It is not yet known if there will be a plan to make this available
Informed Consent Form
Undecided - It is not yet known if there will be a plan to make this available
Clinical Study Report
Not applicable
Analytic Code
Not applicable
Data Dictionary
Not applicable
Title and more details about the data/document
All data collected during the study will be shareable after de-identifying the subjects.
When the data will become available and for how long
The data will be published after the extracted articles are accepted.
To whom data/document is available
All people
Under which criteria data/document could be used
All data collected during the study will be shareable after de-identifying the subjects. The requester will only be permitted to use the data for meta-analysis reviews.
From where data/document is obtainable
Corresponding author: Davar Khodadadi, Faculty of Physical Education and Sports Sciences, Islamic Azad University Central Tehran Branch, Tehran, Iran Email: davar.khodadadi@yahoo.com
What processes are involved for a request to access data/document
Sending an email request to the corresponding author: Davar Khodadadi Email: davar.khodadadi@yahoo.com