Effects of 8-Week CrossFit-Based Concurrent Training on Fitness, Body Composition, and Psychologi… (NCT07552844) | Clinical Trial Compass
Not Yet RecruitingNot Applicable
Effects of 8-Week CrossFit-Based Concurrent Training on Fitness, Body Composition, and Psychological Outcomes in Schoolchildren
Spain30 participantsStarted 2026-06
Plain-language summary
This study examines the effects of an 8-week CrossFit-based concurrent training program in boys and girls aged 7 to 11 years, comparing an experimental group (n=15) with a control group (n=15). The aim is to assess changes in strength, cardiorespiratory fitness, body composition, and psychological variables such as anxiety, stress, and self-esteem, using field-based physical tests (CMJ, Course Navette, handgrip strength, etc.) and validated questionnaires. The study follows a randomized controlled trial design with pre- and post-intervention assessments. The experimental group will complete two weekly CrossFit sessions adapted for children, while the control group will maintain their usual routine without structured physical training. The hypothesis states that the intervention will significantly improve both physical performance and psychological well-being in the experimental group compared to the control group.
Who can participate
Age range
7 Years – 11 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* Age: 7-11 years.
* Students enrolled at CEIP Pablo García Baena (Córdoba).
For the experimental group:
* Availability to attend the Triple XXX Box (Polígono Pedroches, C. los Alfareros, Parcel 119, 14014 Córdoba), where both assessments and training sessions will be conducted.
* Availability to attend training sessions twice per week for the 8-week intervention period.
* No participation in extracurricular physical activity prior to the start of the CrossFit program.
For the control group:
No participation in extracurricular physical activity. Informed consent signed by parents or legal guardians. No medical, psychological, or behavioral contraindications that would prevent participation in physical activity.
Exclusion Criteria:
* Children with musculoskeletal injuries, diseases, or medical, psychological, or behavioral conditions that limit physical activity or interfere with the assessment of outcomes.
* Inability or anticipated difficulty in regularly attending training sessions.
* Refusal of parents or legal guardians to provide informed consent.
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Countermovement Jump Test (CMJ) - Explosive Strength Test
Timeframe: Week 1 (Day 1), Week 8 (Day 16)
2
Standing Long Jump
Timeframe: Week 1 (Day 1), Week 8 (Day 16)
3
Medicine Ball Throw Test
Timeframe: Week 1 (Day 1), Week 8 (Day 16)
4
20 m Shuttle Run Test (Course-Navette)
Timeframe: Week 1 (Day 1), Week 8 (Day 16)
5
Plank Hold Time
Timeframe: Week 1 (Day 1), Week 8 (Day 16)
6
Burpess
Timeframe: Week 1 (Day 1), Week 8 (Day 16)
7
Step Test
Timeframe: Week 1 (Day 1), Week 8 (Day 16)
8
State-Trait Anxiety Inventory for Children
Trial details
NCT IDNCT07552844
SponsorMaimónides Biomedical Research Institute of Córdoba