Health-Related Physical FitnessNCT07845864
Effects of Microdosed Resistance Training During Physical Education on Health-Related Fitness in Adolescents
A study testing Resistance training microdosing during physical education in people with Health-Related Physical Fitness, run by Wroclaw University of Health and Sport Sciences.
Trial summary
This study will examine whether short bouts of resistance training incorporated into physical education lessons can improve health-related physical fitness in secondary school students aged 15-16 years. A total of 264 students will participate in two successive cohorts. Read more about this study
- Who is it for?
- Ages 15 to 18 yearsHealthy volunteers can take part
- Conditions the study is for
- Health-Related Physical Fitness
- What is being tested?
- Resistance training microdosing during physical education
- Type of treatment
- Lifestyle or therapy programme
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 264 participants
- Where
- No sites listed yet
- Study dates
- 1 Nov 2026to Apr 2028
- 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 15 to 18 years
- All sexes
- Healthy volunteers accepted
- Child, Adult
Who may be able to join
- Enrollment in the second year of a participating secondary school.
- Participation in regular physical education lessons at the participating school.
- No health contraindications to physical exercise.
- Written informed consent from the participant and, for participants who are minors, written informed consent from a parent or legal guardian.
Who cannot join
- Acute or chronic musculoskeletal injury preventing safe participation in the exercise intervention or physical fitness assessments.
- Chronic disease or other medical condition constituting a contraindication to physical exercise.
- Medical recommendation limiting participation in physical activity.
- Acute infection or other temporary health condition preventing safe participation in a scheduled assessment.
- Lack of the required informed consent.
Trial locations and contacts
No sites are listed yet. Contact the study team or a site near you to ask about taking part.
About this study
Official title: Effects of Microdosed Resistance Training During Physical Education Lessons on Health-Related Fitness in School Adolescents
This study will examine whether short bouts of resistance training incorporated into physical education lessons can improve health-related physical fitness in secondary school students aged 15-16 years.
A total of 264 students will participate in two successive cohorts. School classes, rather than individual students, will be randomly assigned to study groups. In the first cohort, three resistance-training programs using low, moderate, or high training loads will be compared with usual physical education. The program producing the most consistent beneficial changes will then be tested in a new group of students in the second cohort and compared with usual physical education.
Read more
Each training program will last eight weeks. Participants will be assessed before the intervention, halfway through it, immediately after it, and eight weeks after it ends. Assessments will include body composition, blood pressure, cardiorespiratory fitness, muscular fitness, jumping performance, trunk muscular endurance, and sprint performance.
The study will evaluate both average changes in each group and the proportion of students showing improvements greater than the expected measurement error of the tests.
Read the detailed description
This school-based study is designed as a two-stage, cluster-randomized controlled trial consisting of an exploratory cohort followed by a confirmatory cohort. The school class is the unit of randomization. Planned enrollment is 132 students in each cohort, for a total of 264 participants.
In Cohort I, participating classes will be randomized in a 1:1:1:1 ratio to one of four study conditions: low-load resistance training, moderate-load resistance training, high-load resistance training, or usual physical education. The three resistance-training conditions will differ primarily in training load, repetition range, number of sets, rest intervals, and repetitions in reserve.
The resistance-training program showing the highest frequency of beneficial individual responses in Cohort I will be selected for further evaluation. A beneficial individual response will be defined as an improvement exceeding the minimal detectable change (MDC) for the respective outcome. Cohort II will include a new set of school classes randomized in a 1:1 ratio to either the resistance-training program selected from Cohort I or usual physical education.
Randomization will be performed at the class level using permuted blocks. Block size will be four classes in Cohort I and two classes in Cohort II. The sex composition of classes will be considered to support balanced allocation across study conditions. The randomization sequence will be generated using R with a fixed random seed. Participants and physical education teachers cannot be blinded to group assignment. Outcome assessors will remain unaware of class allocation where feasible.
The resistance-training interventions will be incorporated into regular physical education lessons and supervised by physical education teachers. Exercises will use body weight, dumbbells, medicine balls, and resistance bands. Training load will progress every two weeks by modifying repetitions, rest intervals, external resistance, or the number of sets according to the assigned training condition.
Measurements will be performed at four time points: before the intervention, at the intervention midpoint, immediately after the eight-week intervention, and eight weeks after completion of the intervention. Assessments will include anthropometric measures, body composition assessed by bioelectrical impedance analysis, resting blood pressure, cardiorespiratory fitness assessed using the 20-m shuttle run test, handgrip strength, countermovement jump performance, standing long jump performance, 30-second sit-up performance, and 10-m sprint performance. Somatic maturation, injury history, dietary habits, rating of perceived exertion, and repetitions in reserve will also be recorded.
Statistical analyses will account for repeated measurements and the clustering of students within school classes. Mixed-effects approaches, including linear mixed models and generalized linear mixed models where appropriate, will be used to evaluate changes over time and differences between study groups. Individual responsiveness will additionally be evaluated using outcome-specific MDC thresholds.
- Conditions
- Health-Related Physical Fitness
- Being tested
- Resistance training microdosing during physical education
- Keywords
- Resistance Training, Physical Education, Adolescents, Cluster Randomized Trial, Body Composition, Cardiorespiratory Fitness, Resistance Training Microdosing, Muscular Fitness, Blood Pressure, School-Based Intervention, Cluster Randomized Controlled Trial
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Resistance training microdosing during physical educationBehavioural
Teacher-supervised resistance training incorporated into physical education over eight weeks using body weight, dumbbells, medicine balls, and resistance bands. Cohort I compares three prescriptions: low-load (2-3 sets, 12-15 repetitions, 30-40 s rest, 3-4 repetitions in reserve), medium-load (3-4 sets, 8-12 repetitions, about 60 s rest, 2-3 repetitions in reserve), and high-load (4-5 sets, 6-8 repetitions, about 90 s rest, 1-2 repetitions in reserve). Progression occurs every two weeks through changes in repetitions, rest, external resistance, or sets. Cohort II receives the program selected from Cohort I based on the frequency of improvements exceeding minimal detectable change.
| Study group | Role | What they receive |
|---|---|---|
| Cohort I: Low-Load Resistance Training | Experimental | Teacher-supervised resistance training incorporated into physical education lessons for eight weeks. Exercises use body weight, dumbbells, medicine balls, and resistance bands. The initial prescription consists of 2-3 sets of 12-15 repetitions, 30-40 seconds of rest between sets, and 3-4 repetitions in reserve. Training progresses every two weeks through planned changes in repetitions, rest intervals, external resistance, or number of sets. Receives: Behavioral: Resistance training microdosing during physical education |
| Cohort I: Moderate-Load Resistance Training | Experimental | Teacher-supervised resistance training incorporated into physical education lessons for eight weeks. Exercises use body weight, dumbbells, medicine balls, and resistance bands. The initial prescription consists of 3-4 sets of 8-12 repetitions, approximately 60 seconds of rest between sets, and 2-3 repetitions in reserve. Training progresses every two weeks through planned changes in repetitions, rest intervals, external resistance, or number of sets. Receives: Behavioral: Resistance training microdosing during physical education |
| Cohort I: High-Load Resistance Training | Experimental | Teacher-supervised resistance training incorporated into physical education lessons for eight weeks. Exercises use body weight, dumbbells, medicine balls, and resistance bands. The initial prescription consists of 4-5 sets of 6-8 repetitions, approximately 90 seconds of rest between sets, and 1-2 repetitions in reserve. Training progresses every two weeks through planned changes in repetitions, rest intervals, external resistance, or number of sets. Receives: Behavioral: Resistance training microdosing during physical education |
| Cohort I: Usual Physical Education | No intervention | Students assigned to the control arm will continue their usual school physical education lessons for eight weeks and will not receive the study-specific resistance training microdosing intervention. |
| Cohort II: Selected Resistance Training Program | Experimental | Teacher-supervised resistance training incorporated into physical education lessons for eight weeks. The program will be the low-, moderate-, or high-load resistance training protocol selected after completion of Cohort I according to the prespecified criterion of the highest frequency of beneficial individual responses exceeding the minimal detectable change in the assessed health-related fitness outcomes. The selected protocol will be implemented in a new set of school classes in Cohort II Receives: Behavioral: Resistance training microdosing during physical education |
| Cohort II: Usual Physical Education | No intervention | New classes assigned to the control arm will continue their usual school physical education lessons for eight weeks and will not receive the study-specific resistance training microdosing intervention. |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change in Body Fat Percentage
Body fat percentage will be assessed using bioelectrical impedance analysis. Measurements will be obtained at baseline, week 4, week 8, and week 16. Change from baseline at each post-baseline assessment will be analyzed and expressed in percentage points.
Measured: Baseline, week 4, week 8, and week 16
Change in Muscle Mass
Muscle mass will be assessed using bioelectrical impedance analysis. Measurements will be obtained at baseline, week 4, week 8, and week 16. Change from baseline at each post-baseline assessment will be analyzed.
Measured: Baseline, week 4, week 8, and week 16
Change in Systolic Blood Pressure
Systolic blood pressure will be measured after five minutes of seated rest. Three measurements will be obtained at each assessment, and the mean of the three measurements will be used for analysis. Change from baseline at each post-baseline assessment will be analyzed.
Measured: Baseline, week 4, week 8, and week 16
Change in Diastolic Blood Pressure
Diastolic blood pressure will be measured after five minutes of seated rest. Three measurements will be obtained at each assessment, and the mean of the three measurements will be used for analysis. Change from baseline at each post-baseline assessment will be analyzed.
Measured: Baseline, week 4, week 8, and week 16
Change in Estimated Maximal Oxygen Uptake
Cardiorespiratory fitness will be assessed using the 20-m shuttle run test. Maximal oxygen uptake (VO2max) will be estimated from test performance. Measurements will be obtained at baseline, week 4, week 8, and week 16, and change from baseline will be analyzed.
Measured: Baseline, week 8
Change in Handgrip Strength
Isometric handgrip strength will be assessed using a handgrip dynamometer. Measurements will be obtained at baseline, week 4, week 8, and week 16. Change from baseline at each post-baseline assessment will be analyzed.
Measured: Baseline, week 4, week 8, and week 16
Change in Countermovement Jump Performance
Vertical lower-limb power will be assessed using the countermovement jump. Jump height will be recorded at baseline, week 4, week 8, and week 16. Change from baseline at each post-baseline assessment will be analyzed.
Measured: Baseline, week 4, week 8, and week 16
Change in Standing Long Jump Performance
Horizontal lower-limb power will be assessed using the standing long jump. Jump distance will be recorded at baseline, week 4, week 8, and week 16. Change from baseline at each post-baseline assessment will be analyzed.
Measured: Baseline, week 4, week 8, and week 16
Change in 30-Second Sit-Up Performance
Trunk muscular endurance will be assessed using a 30-second sit-up test. The number of correctly completed repetitions will be recorded at baseline, week 4, week 8, and week 16. Change from baseline at each post-baseline assessment will be analyzed.
Measured: Baseline, week 4, week 8, and week 16
Change in 10-m Sprint Performance
Locomotor speed and acceleration will be assessed using a 10-m sprint measured with photocells. Two trials will be performed, and the best performance will be used for analysis. Measurements will be obtained at baseline, week 4, week 8, and week 16, and change from baseline will be analyzed.
Measured: Baseline, week 4, week 8, and week 16
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted29 Sep 2026
- Study start1 Nov 2026 (estimated)
- Primary completionApr 2028 (estimated)
- Study completionApr 2028 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Health-Related Physical FitnessStudies 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
- Randomised
- Intervention model
- Sequential
- Model description
- Two-stage cluster-randomized design with school classes as the unit of randomization. In Cohort I, classes are randomized 1:1:1:1 to low-, moderate-, or high-load resistance training or usual physical education. After Cohort I, one resistance-training program is selected using prespecified response criteria. In Cohort II, new classes are randomized 1:1 to the selected program or usual physical education.
- Masking
- Single blind
- Who is masked
- Outcomes assessor
- Enrolment
- 264 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Wroclaw University of Health and Sport Sciences
- Sponsor type
- University, hospital or other
- Collaborators
- Ministry of Science and Higher Education, Poland
- Responsible party
- Principal investigator, Dawid Koźlenia, Wroclaw University of Health and Sport Sciences
- Investigators
- Dawid Koźlenia, PhD, Principal investigator, Wroclaw University of Health and Sport Sciences
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07845864
- Sponsor's protocol ID
- NdRS/SP/0160/2025/01
- Other IDs
- NdRS/SP/0160/2025/01
- Status last verified
- Sep 2026
- First submitted
- 21 Sep 2026
- Last updated
- 29 Sep 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 underlying the results reported in study publications may be shared with qualified researchers upon reasonable request to the Principal Investigator, subject to applicable data protection regulations, institutional requirements, and the conditions of informed consent. No directly identifiable participant information will be shared.
Study at a glance
From the registry record, last updated by the sponsor on 29 Sep 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Effects of Microdosed Resistance Training During Physical Education Lessons on Health-Related Fitness in School Adolescents
- ClinicalTrials.gov ID
- NCT07845864
- Acronym / sponsor ID
- NdRS/SP/0160/2025/01
- Conditions
- Health-Related Physical Fitness
- Keywords
- Resistance Training, Physical Education, Adolescents, Cluster Randomized Trial, Body Composition, Cardiorespiratory Fitness, Resistance Training Microdosing, Muscular Fitness
- Study type
- Interventional
- Recruitment status
- Not yet recruiting
- Enrolment
- 264 participants (estimated)
- Lead sponsor
- Wroclaw University of Health and Sport SciencesUniversity, hospital or other
- Collaborators
- Ministry of Science and Higher Education, Poland
- Study start
- 1 Nov 2026 (estimated)
- Primary completion
- Apr 2028 (estimated)
- Study completion
- Apr 2028 (estimated)
- First posted
- 29 Sep 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 will examine whether short bouts of resistance training incorporated into physical education lessons can improve health-related physical fitness in secondary school students aged 15-16 years.
A total of 264 students will participate in two successive cohorts. School classes, rather than individual students, will be randomly assigned to study groups. In the first cohort, three resistance-training programs using low, moderate, or high training loads will be compared with usual physical education. The program producing the most consistent beneficial changes will then be tested in a new group of students in the second cohort and compared with usual physical education.
Each training program will last eight weeks. Participants will be assessed before the intervention, halfway through it, immediately after it, and eight weeks after it ends. Assessments will include body composition, blood pressure, cardiorespiratory fitness, muscular fitness, jumping performance, trunk muscular endurance, and sprint performance.
The study will evaluate both average changes in each group and the proportion of students showing improvements greater than the expected measurement error of the tests.
Detailed description
This school-based study is designed as a two-stage, cluster-randomized controlled trial consisting of an exploratory cohort followed by a confirmatory cohort. The school class is the unit of randomization. Planned enrollment is 132 students in each cohort, for a total of 264 participants.
In Cohort I, participating classes will be randomized in a 1:1:1:1 ratio to one of four study conditions: low-load resistance training, moderate-load resistance training, high-load resistance training, or usual physical education. The three resistance-training conditions will differ primarily in training load, repetition range, number of sets, rest intervals, and repetitions in reserve.
The resistance-training program showing the highest frequency of beneficial individual responses in Cohort I will be selected for further evaluation. A beneficial individual response will be defined as an improvement exceeding the minimal detectable change (MDC) for the respective outcome. Cohort II will include a new set of school classes randomized in a 1:1 ratio to either the resistance-training program selected from Cohort I or usual physical education.
Randomization will be performed at the class level using permuted blocks. Block size will be four classes in Cohort I and two classes in Cohort II. The sex composition of classes will be considered to support balanced allocation across study conditions. The randomization sequence will be generated using R with a fixed random seed. Participants and physical education teachers cannot be blinded to group assignment. Outcome assessors will remain unaware of class allocation where feasible.
The resistance-training interventions will be incorporated into regular physical education lessons and supervised by physical education teachers. Exercises will use body weight, dumbbells, medicine balls, and resistance bands. Training load will progress every two weeks by modifying repetitions, rest intervals, external resistance, or the number of sets according to the assigned training condition.
Measurements will be performed at four time points: before the intervention, at the intervention midpoint, immediately after the eight-week intervention, and eight weeks after completion of the intervention. Assessments will include anthropometric measures, body composition assessed by bioelectrical impedance analysis, resting blood pressure, cardiorespiratory fitness assessed using the 20-m shuttle run test, handgrip strength, countermovement jump performance, standing long jump performance, 30-second sit-up performance, and 10-m sprint performance. Somatic maturation, injury history, dietary habits, rating of perceived exertion, and repetitions in reserve will also be recorded.
Statistical analyses will account for repeated measurements and the clustering of students within school classes. Mixed-effects approaches, including linear mixed models and generalized linear mixed models where appropriate, will be used to evaluate changes over time and differences between study groups. Individual responsiveness will additionally be evaluated using outcome-specific MDC thresholds.
Study design
- Primary purpose
- Other
- Allocation
- Randomised
- Intervention model
- Sequential
- Masking
- Single blind (outcomes assessor)
- Number of arms
- 6
- Model description
- Two-stage cluster-randomized design with school classes as the unit of randomization. In Cohort I, classes are randomized 1:1:1:1 to low-, moderate-, or high-load resistance training or usual physical education. After Cohort I, one resistance-training program is selected using prespecified response criteria. In Cohort II, new classes are randomized 1:1 to the selected program or usual physical education.
| Arm | Type | Receives |
|---|---|---|
| Cohort I: Low-Load Resistance Training | Experimental | Behavioral: Resistance training microdosing during physical educationTeacher-supervised resistance training incorporated into physical education lessons for eight weeks. Exercises use body weight, dumbbells, medicine balls, and resistance bands. The initial prescription consists of 2-3 sets of 12-15 repetitions, 30-40 seconds of rest between sets, and 3-4 repetitions in reserve. Training progresses every two weeks through planned changes in repetitions, rest intervals, external resistance, or number of sets. |
| Cohort I: Moderate-Load Resistance Training | Experimental | Behavioral: Resistance training microdosing during physical educationTeacher-supervised resistance training incorporated into physical education lessons for eight weeks. Exercises use body weight, dumbbells, medicine balls, and resistance bands. The initial prescription consists of 3-4 sets of 8-12 repetitions, approximately 60 seconds of rest between sets, and 2-3 repetitions in reserve. Training progresses every two weeks through planned changes in repetitions, rest intervals, external resistance, or number of sets. |
| Cohort I: High-Load Resistance Training | Experimental | Behavioral: Resistance training microdosing during physical educationTeacher-supervised resistance training incorporated into physical education lessons for eight weeks. Exercises use body weight, dumbbells, medicine balls, and resistance bands. The initial prescription consists of 4-5 sets of 6-8 repetitions, approximately 90 seconds of rest between sets, and 1-2 repetitions in reserve. Training progresses every two weeks through planned changes in repetitions, rest intervals, external resistance, or number of sets. |
| Cohort I: Usual Physical Education | No intervention | –Students assigned to the control arm will continue their usual school physical education lessons for eight weeks and will not receive the study-specific resistance training microdosing intervention. |
| Cohort II: Selected Resistance Training Program | Experimental | Behavioral: Resistance training microdosing during physical educationTeacher-supervised resistance training incorporated into physical education lessons for eight weeks. The program will be the low-, moderate-, or high-load resistance training protocol selected after completion of Cohort I according to the prespecified criterion of the highest frequency of beneficial individual responses exceeding the minimal detectable change in the assessed health-related fitness outcomes. The selected protocol will be implemented in a new set of school classes in Cohort II |
| Cohort II: Usual Physical Education | No intervention | –New classes assigned to the control arm will continue their usual school physical education lessons for eight weeks and will not receive the study-specific resistance training microdosing intervention. |
Who may qualify
- Ages
- 15 to 18 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Child, Adult
Key inclusion criteria (4 listed)
- Enrollment in the second year of a participating secondary school.
- Participation in regular physical education lessons at the participating school.
- No health contraindications to physical exercise.
- Written informed consent from the participant and, for participants who are minors, written informed consent from a parent or legal guardian.
Key exclusion criteria (5 listed)
- Acute or chronic musculoskeletal injury preventing safe participation in the exercise intervention or physical fitness assessments.
- Chronic disease or other medical condition constituting a contraindication to physical exercise.
- Medical recommendation limiting participation in physical activity.
- Acute infection or other temporary health condition preventing safe participation in a scheduled assessment.
- Lack of the required informed consent.
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 |
|---|---|---|
| Resistance training microdosing during physical educationTeacher-supervised resistance training incorporated into physical education over eight weeks using body weight, dumbbells, medicine balls, and resistance bands. Cohort I compares three prescriptions: low-load (2-3 sets, 12-15 repetitions, 30-40 s rest, 3-4 repetitions in reserve), medium-load (3-4 sets, 8-12 repetitions, about 60 s rest, 2-3 repetitions in reserve), and high-load (4-5 sets, 6-8 repetitions, about 90 s rest, 1-2 repetitions in reserve). Progression occurs every two weeks through changes in repetitions, rest, external resistance, or sets. Cohort II receives the program selected from Cohort I based on the frequency of improvements exceeding minimal detectable change. | Behavioural | Cohort I: High-Load Resistance Training, Cohort I: Low-Load Resistance Training, Cohort I: Moderate-Load Resistance Training, Cohort II: Selected Resistance Training Program |
Primary outcome
Change in Body Fat Percentage
Time frame: Baseline, week 4, week 8, and week 16
Body fat percentage will be assessed using bioelectrical impedance analysis. Measurements will be obtained at baseline, week 4, week 8, and week 16. Change from baseline at each post-baseline assessment will be analyzed and expressed in percentage points.
Change in Muscle Mass
Time frame: Baseline, week 4, week 8, and week 16
Muscle mass will be assessed using bioelectrical impedance analysis. Measurements will be obtained at baseline, week 4, week 8, and week 16. Change from baseline at each post-baseline assessment will be analyzed.
Change in Systolic Blood Pressure
Time frame: Baseline, week 4, week 8, and week 16
Systolic blood pressure will be measured after five minutes of seated rest. Three measurements will be obtained at each assessment, and the mean of the three measurements will be used for analysis. Change from baseline at each post-baseline assessment will be analyzed.
Change in Diastolic Blood Pressure
Time frame: Baseline, week 4, week 8, and week 16
Diastolic blood pressure will be measured after five minutes of seated rest. Three measurements will be obtained at each assessment, and the mean of the three measurements will be used for analysis. Change from baseline at each post-baseline assessment will be analyzed.
Change in Estimated Maximal Oxygen Uptake
Time frame: Baseline, week 8
Cardiorespiratory fitness will be assessed using the 20-m shuttle run test. Maximal oxygen uptake (VO2max) will be estimated from test performance. Measurements will be obtained at baseline, week 4, week 8, and week 16, and change from baseline will be analyzed.
Change in Handgrip Strength
Time frame: Baseline, week 4, week 8, and week 16
Isometric handgrip strength will be assessed using a handgrip dynamometer. Measurements will be obtained at baseline, week 4, week 8, and week 16. Change from baseline at each post-baseline assessment will be analyzed.
Change in Countermovement Jump Performance
Time frame: Baseline, week 4, week 8, and week 16
Vertical lower-limb power will be assessed using the countermovement jump. Jump height will be recorded at baseline, week 4, week 8, and week 16. Change from baseline at each post-baseline assessment will be analyzed.
Change in Standing Long Jump Performance
Time frame: Baseline, week 4, week 8, and week 16
Horizontal lower-limb power will be assessed using the standing long jump. Jump distance will be recorded at baseline, week 4, week 8, and week 16. Change from baseline at each post-baseline assessment will be analyzed.
Change in 30-Second Sit-Up Performance
Time frame: Baseline, week 4, week 8, and week 16
Trunk muscular endurance will be assessed using a 30-second sit-up test. The number of correctly completed repetitions will be recorded at baseline, week 4, week 8, and week 16. Change from baseline at each post-baseline assessment will be analyzed.
Change in 10-m Sprint Performance
Time frame: Baseline, week 4, week 8, and week 16
Locomotor speed and acceleration will be assessed using a 10-m sprint measured with photocells. Two trials will be performed, and the best performance will be used for analysis. Measurements will be obtained at baseline, week 4, week 8, and week 16, and change from baseline will be analyzed.
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 29 Sep 2026.
- Individual participant dataSharing planned: Yes. De-identified individual participant data underlying the results reported in study publications may be shared with qualified researchers upon reasonable request to the Principal Investigator, subject to applicable data protection regulations, institutional requirements, and the conditions of informed consent. No directly identifiable participant information will be shared.
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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.
Dawid Koźlenia, PhD principal investigator
Wroclaw University of Health and Sport Sciences
Questions about this trial
What is this clinical trial studying?
A study testing Resistance training microdosing during physical education in people with Health-Related Physical Fitness, run by Wroclaw University of Health and Sport Sciences.
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 4 inclusion and 5 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 29 Sep 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?
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 Dawid Koźlenia, PhD (+48 71 347 33 61, dawid.kozlenia@awf.wroc.pl), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Change in Body Fat Percentage (time frame: Baseline, week 4, week 8, and week 16). The study lists 10 primary outcomes in all. 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 29 Sep 2026.