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.
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Countermovement Jump Test (CMJ) - Explosive Strength Test
Timeframe: Week 1 (Day 1), Week 8 (Day 16)
Standing Long Jump
Timeframe: Week 1 (Day 1), Week 8 (Day 16)
Medicine Ball Throw Test
Timeframe: Week 1 (Day 1), Week 8 (Day 16)
20 m Shuttle Run Test (Course-Navette)
Timeframe: Week 1 (Day 1), Week 8 (Day 16)
Plank Hold Time
Timeframe: Week 1 (Day 1), Week 8 (Day 16)
Burpess
Timeframe: Week 1 (Day 1), Week 8 (Day 16)
Step Test
Timeframe: Week 1 (Day 1), Week 8 (Day 16)
State-Trait Anxiety Inventory for Children
Timeframe: Week 1 (Day 1), Week 8 (Day 16)
Children's Daily Stress Inventory
Timeframe: Week 1 (Day 1), Week 8 (Day 16)
Rosenberg Self-Esteem Scale
Timeframe: Week 1 (Day 1), Week 8 (Day 16)