Effectiveness of a School-based High-intensity Interval Training Intervention in Adolescents: the PRO-HIIT Cluster Randomised Controlled Trial
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Sponsor
- University of Exeter
- Enrollment
- 369
- Locations
- 1
- Primary Endpoint
- Cardiorespiratory fitness
Study Overview
Brief Summary
A 12-week school-based high-intensity interval training intervention, with 8 classes of year 7 students randomly allocated to either intervention or control group. The interval training sessions will last for 6 to 10 minutes and will be delivered 5 times per week. Outcome variables will be physical activity, body composition, cardiorespiratory fitness, muscular strength, bone health, executive function, mental wellbeing, and academic performance, which will be measured pre- and post-intervention and two months after the intervention has been completed.
Detailed Description
The purpose of this study is to: 1) evaluate the effectiveness of a 12-week school-based HIIT intervention on cardiorespiratory fitness (primary outcome), physical activity, body composition, muscular strength, bone health, executive function, wellbeing, enjoyment, affect, self-efficacy and academic performance among 12-13-year-old adolescents; 2) to examine the changes of these outcomes following a two-month unstructured summer holiday after the study has been completed; 3) to conduct a process evaluation for the study.
The study is a 12-week high-intensity interval training intervention, which is 6 to 10-minute in length and will be delivered 5 times per week among year 7 adolescents, at the start of physical education and physical activity lessons. We will examine the effectiveness of this intervention on outcomes, such as body composition, cardiorespiratory fitness, muscular health, bone health, cognitive function, mental wellbeing, and academic performance. In addition, The investigators will evaluate the fitness changes between school days (structured day) and a two-month summer holiday (unstructured days). This will be achieved by collecting data at three timepoints: pre- and post-intervention and after a 2-month (summer holiday) following the completion of the intervention.
The high-intensity interval training includes resistance-based exercises, such as jumping jacks, high knees, burpees, squat jumps, lunge jumps, and mountain climbers.
Study Design
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Parallel
- Primary Purpose
- Treatment
- Masking
- Single (Outcomes Assessor)
Eligibility Criteria
- Ages
- 11 Years to 13 Years (Child)
- Sex
- All
- Accepts Healthy Volunteers
- Yes
Inclusion Criteria
- •Year 7 students
Exclusion Criteria
- •Unable to perform high-intensity exercises due to existing medical contraindications
- •Unable to understand the study procedures and provide consent
Arms & Interventions
High-intensity interval training group
The experimental group, which will perform high-intensity interval training (HIIT), 5 time per week for 12 weeks.
Intervention: High-intensity interval training (Behavioral)
Control group
Control group, which will continue their normal physical activity, including their usual physical education classes.
Intervention: Control group (Behavioral)
Outcomes
Primary Outcomes
Cardiorespiratory fitness
Time Frame: Changes from baseline to immediately after the intervention and two month following the cessation of the intervention.
Cardiorespiratory fitness will be measured using 20-metre shuttle run. The 20-meter shuttle run requires participants to run back and forth between two lines positioned 20 meters apart. To complete a shuttle, participants must reach the other end before a designated beep sounds. The beep is set to allow the participants to start at 8.5 km/h and increase the speed by 0.5 km/h as indicated by a triple beep. The test concludes if a participant fails to complete two consecutive shuttles or volitionally discontinues.
Secondary Outcomes
- Wellbeing(Changes from baseline to immediately after the intervention and two month following the cessation of the intervention.)
- Enjoyment(Changes from baseline to immediately after the intervention and two month following the cessation of the intervention.)
- Physical activity(Baseline, first week and last week of the intervention and first week following the completion of the intervention.)
- Bone health(Changes from baseline to immediately after the intervention and two month following the cessation of the intervention.)
- Academic performance(Baseline and immediately after the intervention)
- Waist circumference(Changes from baseline to immediately after the intervention and two month following the cessation of the intervention.)
- Motivation(Changes from baseline to immediately after the intervention and two month following the cessation of the intervention.)
- Perceived physical ability(Changes from baseline to immediately after the intervention and two month following the cessation of the intervention.)
- Flanker task(Changes from baseline to immediately after the intervention and two month following the cessation of the intervention.)
- BMI(Changes from baseline to immediately after the intervention and two month following the cessation of the intervention.)
- Muscular strength(Changes from baseline to immediately after the intervention and two month following the cessation of the intervention.)
- Affect(Changes from baseline to immediately after the intervention and two month following the cessation of the intervention.)
- Height(Changes from baseline to immediately after the intervention and two month following the cessation of the intervention.)
- Weight(Changes from baseline to immediately after the intervention and two month following the cessation of the intervention.)
- Colour-shape switch task(Changes from baseline to immediately after the intervention and two month following the cessation of the intervention.)
- Body fat percentage(Changes from baseline to immediately after the intervention and two month following the cessation of the intervention.)
- Visual 2-back task(Changes from baseline to immediately after the intervention and two month following the cessation of the intervention.)