ExerciseINTER-BASKETNCT07752459
Physiological Responses to Basketball-Specific Interval Exercise in Female Basketball Players
A study testing Yo-Yo Intermittent Recovery Test Level 1 (Yo-Yo IR1) in people with Exercise and Fatigue, run by Poznan University of Physical Education at 1 site in Poland.
Trial summary
This study aims to evaluate the effects of interval exercise on metabolic and inflammatory responses, energy substrate utilization, and fatigue in trained female basketball players. Read more about this study
- Who is it for?
- Ages 16 to 22 years, women onlyHealthy volunteers can take part
- Conditions the study is for
- Exercise, Fatigue, Sport Physiology
- What is being tested?
- Yo-Yo Intermittent Recovery Test Level 1 (Yo-Yo IR1)
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 25 participants
- Where
- 1 sitePoland
- Study dates
- 20 Sep 2026to 30 Dec 2026
- 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 16 to 22 years
- Women only
- Healthy volunteers accepted
- Child, Adult
Who may be able to join
- Female, aged 16-22 years.
- Regular participation in organized basketball training.
- Current medical clearance for sports participation.
- No contraindications to high-intensity physical exercise.
- Willingness and ability to provide written informed consent (and parental/legal guardian consent where required for minors).
- Willingness to comply with all study procedures.
- Menstrual cycle phase will be recorded for all participants and considered as a potential covariate in the statistical analyses.
Who cannot join
- Current musculoskeletal injury or any condition preventing maximal exercise.
- Metabolic, cardiovascular, inflammatory, or other chronic diseases affecting exercise capacity or study outcomes.
- Current use of anti-inflammatory medications.
- Use of supplements or substances that may influence the measured metabolic or inflammatory parameters.
- Refusal to undergo blood sampling.
- Failure to comply with pre-test instructions (e.g., dietary or exercise restrictions).
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
Agnieszka Basta contact
Poland1 site
Poznań University of Physical Education, Faculty of Sport Sciences in Gorzów Wielkopolski, Poland; Department of Biological Sciences.
Gorzów Wielkopolski, 66-400
Anna Kasperska, PhD, +48573337282, annakasperska.awf@gmail.com
About this study
Official title: The Effect of Basketball-Specific Interval Exercise on Metabolic and Inflammatory Responses, Energy Substrate Utilization, and Perceived Fatigue in Female Basketball Players
This study aims to evaluate the effects of interval exercise on metabolic and inflammatory responses, energy substrate utilization, and fatigue in trained female basketball players. High-intensity intermittent exercise is a key component of basketball performance and induces substantial metabolic and physiological stress. However, the acute relationships between exercise-induced metabolic changes, inflammatory responses, substrate utilization, and fatigue in female basketball players remain insufficiently understood.
In this prospective interventional study, eligible female basketball players will complete a standardized interval exercise protocol designed to replicate the physiological demands of competitive basketball. Physiological, biochemical, and perceptual measurements will be collected before exercise, immediately after exercise, and during recovery. Primary outcomes include changes in metabolic and inflammatory biomarkers, energy substrate utilization, and fatigue-related responses. Secondary outcomes include selected physiological and performance-related variables associated with recovery from high-intensity interval exercise.
The findings of this study will improve the understanding of the physiological responses to interval exercise in female basketball players and may contribute to the development of evidence-based training and recovery strategies aimed at optimizing performance and athlete health.
Read the detailed description
High-intensity intermittent exercise is a fundamental component of basketball and is characterized by repeated bouts of sprinting, jumping, rapid changes of direction, and brief recovery periods. This type of exercise places substantial demands on both aerobic and anaerobic energy systems and induces complex metabolic and inflammatory responses. Although numerous studies have investigated the physiological effects of high-intensity exercise, the interactions among exercise-induced inflammation, metabolic regulation, energy substrate utilization, and fatigue in female basketball players remain insufficiently understood.
The purpose of this study is to investigate the acute effects of basketball-specific interval exercise on metabolic and inflammatory responses, energy substrate utilization, and psychophysiological fatigue in trained female basketball players. The exercise stimulus will consist of the Yo-Yo Intermittent Recovery Test Level 1 (Yo-Yo IR1), a validated field test that closely simulates the intermittent high-intensity demands of competitive basketball by requiring shuttle runs interspersed with short active recovery periods.
Participants will attend a single experimental session consisting of baseline assessments, completion of a standardized interval exercise protocol, and follow-up assessments during the early recovery period. Biological samples, physiological measurements, and fatigue assessments will be obtained at predefined time points before exercise, immediately after exercise, and one hour after exercise. Laboratory analyses will evaluate selected inflammatory and metabolic biomarkers together with indicators of energy substrate utilization. In addition, subjective fatigue and neuromotor performance will be assessed to characterize both peripheral and central aspects of exercise-induced fatigue.
To minimize potential confounding factors, participants will follow standardized pre-test instructions regarding physical activity, alcohol consumption, caffeine intake, and nutritional preparation before testing. Nutritional intake and anthropometric characteristics will also be documented to support the interpretation of physiological responses.
By integrating biochemical, metabolic, physiological, and psychophysiological measurements within a basketball-specific exercise model, this study aims to improve understanding of the mechanisms underlying acute responses to high-intensity intermittent exercise in female athletes. The findings may contribute to evidence-based strategies for monitoring training load, optimizing recovery, and improving performance in women's basketball and other intermittent team sports.
- Conditions
- Exercise, Fatigue, Sport Physiology
- Being tested
- Yo-Yo Intermittent Recovery Test Level 1 (Yo-Yo IR1)
- Keywords
- basketball, Yo-Yo test, High-Intensity Interval Exercise, Reaction Time, Energy Metabolism, Free Fatty Acids, Exercise-Induced Fatigue, Female Athletes
- Medical subject headings
- Motor Activity, Fatigue
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Yo-Yo Intermittent Recovery Test Level 1 (Yo-Yo IR1)Other
The intervention consists of the Yo-Yo Intermittent Recovery Test Level 1 (Yo-Yo IR1), a standardized maximal intermittent field exercise test designed to reproduce the physiological demands of intermittent team sports such as basketball. Participants perform repeated 20-meter shuttle runs at progressively increasing speeds, guided by audio signals, with 10-second active recovery periods between running bouts. The test continues until volitional exhaustion or until the participant is unable to maintain the required running pace according to the test protocol. The Yo-Yo IR1 is used to induce acute physiological stress for the assessment of metabolic, inflammatory, and fatigue-related responses.
| Study group | Role | What they receive |
|---|---|---|
| High-Intensity Interval Exercise (Yo-Yo IR1) | Experimental | Participants assigned to this arm will complete a single session of the Yo-Yo Intermittent Recovery Test Level 1 (Yo-Yo IR1), a standardized high-intensity intermittent exercise protocol designed to simulate the physiological demands of competitive basketball. Assessments will be conducted before exercise, immediately after exercise, and one hour after exercise to evaluate acute metabolic, inflammatory, physiological, and fatigue-related responses. Receives: Other: Yo-Yo Intermittent Recovery Test Level 1 (Yo-Yo IR1) |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change in Serum Interleukin-6 (IL-6) Concentration
Serum interleukin-6 (IL-6) concentration will be measured to assess the acute inflammatory response induced by the Yo-Yo Intermittent Recovery Test Level 1 (Yo-Yo IR1). The outcome will be expressed as the change in IL-6 concentration across the predefined assessment time points.
Measured: Baseline (pre-exercise), immediately after exercise, and 1 hour after exercise.
Change in Blood Lactate Concentration
Blood lactate concentration measured from capillary blood as an indicator of anaerobic metabolism following high-intensity intermittent exercise.
Measured: Baseline and immediately after exercise.
Change in reaction time
Visual reaction time will be assessed as an indicator of neuromotor performance and central fatigue.
Measured: Baseline and immediately post-exercise.
Secondary outcomes (5)
Change in serum-free fatty acid concentration
Serum free fatty acid concentration will be measured from venous blood samples to evaluate exercise-induced lipid mobilization.
Measured: Baseline, immediately post-exercise, and 1 hour post-exercise
Change in blood glucose concentration
Blood glucose concentration will be measured using a portable glucometer with disposable test strips.
Measured: Baseline, immediately post-exercise, and 1 hour post-exercise
Change in serum insulin concentration
Serum insulin concentration will be measured to assess hormonal regulation of glucose metabolism.
Measured: Baseline, immediately post-exercise, and 1 hour post-exercise
Change in Rating of Perceived Exertion (Borg Scale)
Subjective perception of exercise intensity will be assessed using the Borg Rating of Perceived Exertion Scale. Total scores range from 6 to 20, with higher scores indicating greater perceived exertion during exercise.
Measured: Immediately after exercise completion (within 5 minutes).
Change in mood state assessed by Profile of Mood States (POMS)
Mood state will be assessed using the validated Profile of Mood States questionnaire. Total scores range from 0 to 260, with higher scores indicating greater mood disturbance and psychological distress.
Measured: Before exercise.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted7 Aug 2026
- Study start20 Sep 2026 (estimated)
- Primary completion30 Nov 2026 (estimated)
- Study completion30 Dec 2026 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (7)Papers the sponsor has linked to this study.
- Other trials for ExerciseStudies 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
- Other
- Allocation
- Not applicable
- Intervention model
- Single group
- Model description
- All participants will undergo the same exercise intervention consisting of the Yo-Yo Intermittent Recovery Test Level 1 (Yo-Yo IR1). Repeated assessments will be performed before exercise, immediately after exercise, and one hour after exercise. The protocol is used to induce acute physiological stress and to evaluate metabolic, inflammatory, and fatigue-related responses associated with high-intensity intermittent exercise.
- Masking
- None (open label)
- Enrolment
- 25 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Poznan University of Physical Education
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
- Investigators
- Anna Kasperska, PhD, Principal investigator, Poznań University of Physical Education, Faculty of Sport Sciences in Gorzów Wielkopolski, Poland;
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07752459
- Sponsor's protocol ID
- Basketball players
- Other IDs
- DGR.V.042.2.4.2026
- Acronym
- INTER-BASKET
- Status last verified
- Aug 2026
- First submitted
- 3 Aug 2026
- Last updated
- 12 Aug 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No: Individual participant data collected during this study will not be made publicly available.
Publications
Ben Abdelkrim N, Nabli MA, Chamari K. Physical playing pattern and ecological validity of the YoYo-IR1 Test in U-19 female basketball. J Sports Med Phys Fitness. 2020 Apr;60(4):544-551. doi: 10.23736/S0022-4707.19.10368-4. Epub 2020 Jan 23.
PubMed 31974338Cao S, Li Z, Wang Z, Geok SK, Liu J. The Effects of High-Intensity Interval Training on Basketball Players: A Systematic Review and Meta-Analysis. J Sports Sci Med. 2025 Mar 1;24(1):31-51. doi: 10.52082/jssm.2025.31. eCollection 2025 Mar.
PubMed 40046212Scherr J, Wolfarth B, Christle JW, Pressler A, Wagenpfeil S, Halle M. Associations between Borg's rating of perceived exertion and physiological measures of exercise intensity. Eur J Appl Physiol. 2013 Jan;113(1):147-55. doi: 10.1007/s00421-012-2421-x. Epub 2012 May 22.
PubMed 22615009Jribi W, Bougrine H, Aloui A, Khalfoun J, Souissi N, Mkacher W, El Abed K, Ben Abderrahman A. Morning-evening differences of short-term maximal performance and psychological variables in female athletes. Front Physiol. 2024 May 30;15:1402147. doi: 10.3389/fphys.2024.1402147. eCollection 2024.
PubMed 38872835Bransford DR, Howley ET. Effects of training on plasma FFA during exercise in women. Eur J Appl Physiol Occup Physiol. 1979 Jul 2;41(3):151-8. doi: 10.1007/BF00430007. No abstract available.
PubMed 488080Matsuda T, Takahashi H, Nakamura M, Kanno M, Ogata H, Ishikawa A, Yamada M, Kamemoto K, Sakamaki-Sunaga M. Influence of menstrual cycle on muscle glycogen utilization during high-intensity intermittent exercise until exhaustion in healthy women. Appl Physiol Nutr Metab. 2022 Jun 1;47(6):671-680. doi: 10.1139/apnm-2021-0532. Epub 2022 Jul 20.
PubMed 35856390Friedlander AL, Casazza GA, Horning MA, Buddinger TF, Brooks GA. Effects of exercise intensity and training on lipid metabolism in young women. Am J Physiol. 1998 Nov;275(5):E853-63. doi: 10.1152/ajpendo.1998.275.5.E853.
PubMed 9815006
Study at a glance
From the registry record, last updated by the sponsor on 12 Aug 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Effect of Basketball-Specific Interval Exercise on Metabolic and Inflammatory Responses, Energy Substrate Utilization, and Perceived Fatigue in Female Basketball Players
- ClinicalTrials.gov ID
- NCT07752459
- Acronym / sponsor ID
- INTER-BASKET / Basketball players
- Conditions
- Exercise, Fatigue, Sport Physiology
- Keywords
- basketball, Yo-Yo test, High-Intensity Interval Exercise, Reaction Time, Energy Metabolism, Free Fatty Acids, Exercise-Induced Fatigue, Female Athletes
- Study type
- Interventional
- Recruitment status
- Not yet recruiting
- Enrolment
- 25 participants (estimated)
- Lead sponsor
- Poznan University of Physical EducationUniversity, hospital or other
- Study start
- 20 Sep 2026 (estimated)
- Primary completion
- 30 Nov 2026 (estimated)
- Study completion
- 30 Dec 2026 (estimated)
- First posted
- 7 Aug 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 evaluate the effects of interval exercise on metabolic and inflammatory responses, energy substrate utilization, and fatigue in trained female basketball players. High-intensity intermittent exercise is a key component of basketball performance and induces substantial metabolic and physiological stress. However, the acute relationships between exercise-induced metabolic changes, inflammatory responses, substrate utilization, and fatigue in female basketball players remain insufficiently understood.
In this prospective interventional study, eligible female basketball players will complete a standardized interval exercise protocol designed to replicate the physiological demands of competitive basketball. Physiological, biochemical, and perceptual measurements will be collected before exercise, immediately after exercise, and during recovery. Primary outcomes include changes in metabolic and inflammatory biomarkers, energy substrate utilization, and fatigue-related responses. Secondary outcomes include selected physiological and performance-related variables associated with recovery from high-intensity interval exercise.
The findings of this study will improve the understanding of the physiological responses to interval exercise in female basketball players and may contribute to the development of evidence-based training and recovery strategies aimed at optimizing performance and athlete health.
Detailed description
High-intensity intermittent exercise is a fundamental component of basketball and is characterized by repeated bouts of sprinting, jumping, rapid changes of direction, and brief recovery periods. This type of exercise places substantial demands on both aerobic and anaerobic energy systems and induces complex metabolic and inflammatory responses. Although numerous studies have investigated the physiological effects of high-intensity exercise, the interactions among exercise-induced inflammation, metabolic regulation, energy substrate utilization, and fatigue in female basketball players remain insufficiently understood.
The purpose of this study is to investigate the acute effects of basketball-specific interval exercise on metabolic and inflammatory responses, energy substrate utilization, and psychophysiological fatigue in trained female basketball players. The exercise stimulus will consist of the Yo-Yo Intermittent Recovery Test Level 1 (Yo-Yo IR1), a validated field test that closely simulates the intermittent high-intensity demands of competitive basketball by requiring shuttle runs interspersed with short active recovery periods.
Participants will attend a single experimental session consisting of baseline assessments, completion of a standardized interval exercise protocol, and follow-up assessments during the early recovery period. Biological samples, physiological measurements, and fatigue assessments will be obtained at predefined time points before exercise, immediately after exercise, and one hour after exercise. Laboratory analyses will evaluate selected inflammatory and metabolic biomarkers together with indicators of energy substrate utilization. In addition, subjective fatigue and neuromotor performance will be assessed to characterize both peripheral and central aspects of exercise-induced fatigue.
To minimize potential confounding factors, participants will follow standardized pre-test instructions regarding physical activity, alcohol consumption, caffeine intake, and nutritional preparation before testing. Nutritional intake and anthropometric characteristics will also be documented to support the interpretation of physiological responses.
By integrating biochemical, metabolic, physiological, and psychophysiological measurements within a basketball-specific exercise model, this study aims to improve understanding of the mechanisms underlying acute responses to high-intensity intermittent exercise in female athletes. The findings may contribute to evidence-based strategies for monitoring training load, optimizing recovery, and improving performance in women's basketball and other intermittent team sports.
Study design
- Primary purpose
- Other
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
- Model description
- All participants will undergo the same exercise intervention consisting of the Yo-Yo Intermittent Recovery Test Level 1 (Yo-Yo IR1). Repeated assessments will be performed before exercise, immediately after exercise, and one hour after exercise. The protocol is used to induce acute physiological stress and to evaluate metabolic, inflammatory, and fatigue-related responses associated with high-intensity intermittent exercise.
| Arm | Type | Receives |
|---|---|---|
| High-Intensity Interval Exercise (Yo-Yo IR1) | Experimental | Other: Yo-Yo Intermittent Recovery Test Level 1 (Yo-Yo IR1)Participants assigned to this arm will complete a single session of the Yo-Yo Intermittent Recovery Test Level 1 (Yo-Yo IR1), a standardized high-intensity intermittent exercise protocol designed to simulate the physiological demands of competitive basketball. Assessments will be conducted before exercise, immediately after exercise, and one hour after exercise to evaluate acute metabolic, inflammatory, physiological, and fatigue-related responses. |
Who may qualify
- Ages
- 16 to 22 years
- Sex
- Female only
- Healthy volunteers
- Accepted
- Age groups
- Child, Adult
Key inclusion criteria (7 listed)
- Female, aged 16-22 years.
- Regular participation in organized basketball training.
- Current medical clearance for sports participation.
- No contraindications to high-intensity physical exercise.
- Willingness and ability to provide written informed consent (and parental/legal guardian consent where required for minors).
Key exclusion criteria (6 listed)
- Current musculoskeletal injury or any condition preventing maximal exercise.
- Metabolic, cardiovascular, inflammatory, or other chronic diseases affecting exercise capacity or study outcomes.
- Current use of anti-inflammatory medications.
- Use of supplements or substances that may influence the measured metabolic or inflammatory parameters.
- Refusal to undergo blood sampling.
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 |
|---|---|---|
| Yo-Yo Intermittent Recovery Test Level 1 (Yo-Yo IR1)The intervention consists of the Yo-Yo Intermittent Recovery Test Level 1 (Yo-Yo IR1), a standardized maximal intermittent field exercise test designed to reproduce the physiological demands of intermittent team sports such as basketball. Participants perform repeated 20-meter shuttle runs at progressively increasing speeds, guided by audio signals, with 10-second active recovery periods between running bouts. The test continues until volitional exhaustion or until the participant is unable to maintain the required running pace according to the test protocol. The Yo-Yo IR1 is used to induce acute physiological stress for the assessment of metabolic, inflammatory, and fatigue-related responses. | Other | High-Intensity Interval Exercise (Yo-Yo IR1) |
Primary outcome
Change in Serum Interleukin-6 (IL-6) Concentration
Time frame: Baseline (pre-exercise), immediately after exercise, and 1 hour after exercise.
Serum interleukin-6 (IL-6) concentration will be measured to assess the acute inflammatory response induced by the Yo-Yo Intermittent Recovery Test Level 1 (Yo-Yo IR1). The outcome will be expressed as the change in IL-6 concentration across the predefined assessment time points.
Change in Blood Lactate Concentration
Time frame: Baseline and immediately after exercise.
Blood lactate concentration measured from capillary blood as an indicator of anaerobic metabolism following high-intensity intermittent exercise.
Change in reaction time
Time frame: Baseline and immediately post-exercise.
Visual reaction time will be assessed as an indicator of neuromotor performance and central fatigue.
5 secondary outcomes
Change in serum-free fatty acid concentration
Time frame: Baseline, immediately post-exercise, and 1 hour post-exercise
Change in blood glucose concentration
Time frame: Baseline, immediately post-exercise, and 1 hour post-exercise
Change in serum insulin concentration
Time frame: Baseline, immediately post-exercise, and 1 hour post-exercise
Change in Rating of Perceived Exertion (Borg Scale)
Time frame: Immediately after exercise completion (within 5 minutes).
Change in mood state assessed by Profile of Mood States (POMS)
Time frame: Before exercise.
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 12 Aug 2026.
- Background: PubMed 31974338Ben Abdelkrim N, Nabli MA, Chamari K. Physical playing pattern and ecological validity of the YoYo-IR1 Test in U-19 female basketball. J Sports Med Phys Fitness. 2020 Apr;60(4):544-551. doi: 10.23736/S0022-4707.19.10368-4. Epub 2020 Jan 23.
- Background: PubMed 40046212Cao S, Li Z, Wang Z, Geok SK, Liu J. The Effects of High-Intensity Interval Training on Basketball Players: A Systematic Review and Meta-Analysis. J Sports Sci Med. 2025 Mar 1;24(1):31-51. doi: 10.52082/jssm.2025.31. eCollection 2025 Mar.
- Background: PubMed 22615009Scherr J, Wolfarth B, Christle JW, Pressler A, Wagenpfeil S, Halle M. Associations between Borg's rating of perceived exertion and physiological measures of exercise intensity. Eur J Appl Physiol. 2013 Jan;113(1):147-55. doi: 10.1007/s00421-012-2421-x. Epub 2012 May 22.
- Background: PubMed 38872835Jribi W, Bougrine H, Aloui A, Khalfoun J, Souissi N, Mkacher W, El Abed K, Ben Abderrahman A. Morning-evening differences of short-term maximal performance and psychological variables in female athletes. Front Physiol. 2024 May 30;15:1402147. doi: 10.3389/fphys.2024.1402147. eCollection 2024.
- Background: PubMed 488080Bransford DR, Howley ET. Effects of training on plasma FFA during exercise in women. Eur J Appl Physiol Occup Physiol. 1979 Jul 2;41(3):151-8. doi: 10.1007/BF00430007. No abstract available.
- Background: PubMed 35856390Matsuda T, Takahashi H, Nakamura M, Kanno M, Ogata H, Ishikawa A, Yamada M, Kamemoto K, Sakamaki-Sunaga M. Influence of menstrual cycle on muscle glycogen utilization during high-intensity intermittent exercise until exhaustion in healthy women. Appl Physiol Nutr Metab. 2022 Jun 1;47(6):671-680. doi: 10.1139/apnm-2021-0532. Epub 2022 Jul 20.
- Background: PubMed 9815006Friedlander AL, Casazza GA, Horning MA, Buddinger TF, Brooks GA. Effects of exercise intensity and training on lipid metabolism in young women. Am J Physiol. 1998 Nov;275(5):E853-63. doi: 10.1152/ajpendo.1998.275.5.E853.
- Individual participant dataSharing planned: No. Individual participant data collected during this study will not be made publicly available.
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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.
Agnieszka Basta contact
Anna Kasperska, PhD principal investigator
Poznań University of Physical Education, Faculty of Sport Sciences in Gorzów Wielkopolski, Poland;
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Yo-Yo Intermittent Recovery Test Level 1 (Yo-Yo IR1) in people with Exercise and Fatigue, run by Poznan University of Physical Education at 1 site in Poland.
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 7 inclusion and 6 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 12 Aug 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 Poland. 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 Anna Kasperska, PhD (+48573337282, annakasperska.awf@gmail.com), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Change in Serum Interleukin-6 (IL-6) Concentration (time frame: Baseline (pre-exercise), immediately after exercise, and 1 hour after exercise.). 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?
On the ClinicalTrials.gov record for NCT07752459, which also lists 7 linked publications.
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 12 Aug 2026.