# Identifying facilitators and barriers for adolescents participating in a school-based HIIT intervention: the eXercise for asthma with commando Joe's(R) (X4ACJ) programme

PMID: 32357869
Journal: BMC public health
Published: 2020 May 1
Authors: Sharp CA, McNarry MA, Eddolls WTB, Koorts H, Winn CON, Mackintosh KA

## Question

What helped or hindered adolescent participation in a before/after-school HIIT program?

## Summary

This qualitative study asked adolescents about a 6-month school HIIT program. Games, enjoyment, competition, and visible benefits helped participation, while timing, competing interests, disruptive peers, instructor style, repetition, and sessions feeling too hard were barriers.

## Population

- Eighty adolescents from one South Wales secondary school intervention group.
- Sample size: 80
- Age: 13.1 +/- 1.0 years
- Sex: 45 boys; girls included
- Fitness level: School adolescents with varied activity levels
- Health status: School cohort; asthma-related intervention context

## Methodology

- Qualitative focus-group process study
- Focus groups after a 6-month intervention
- Single secondary school in South Wales

## Protocol

- X4ACJ school HIIT.
- Modality: School-based HIIT games/exercises.
- Intensity: High-intensity interval training; exact target not reported.
- Session duration: 30 minutes.
- Frequency: 3 sessions/week.
- Program length: 6 months.
- Progression: Not reported.

## Outcomes

### Enjoyment
Status: mixed
Enjoyment helped attendance, but many non-attendees did not enjoy sessions.

Enjoyment: 72% attendees, 48% non-attendees; 32% non-attendees did not enjoy.

### Games
Status: improved
Game features were the strongest facilitator.

Reported by 81% of attendees and 52% of non-attendees.

### Barriers
Status: mixed
Timing, competing interests, peers, instructor style, repetition, and excessive challenge limited participation.

Timing barrier around 50% attendees and 41% non-attendees; competing interests 42% and 48%.

## Practical Insights

- For youth, games and variety may matter more than abstract health-benefit education.
- Before/after-school timing and peer dynamics can determine attendance.

## Limitations

- Qualitative focus-group study from one school.
- Self-selection and social desirability bias possible.
- Exact HIIT protocol and safety monitoring not fully reported.
- No instructor interviews.

## Safety And Adherence

- No adverse events were reported in this focus-group article.
- Safety/tolerability concerns appeared as participant experience barriers: some adolescents felt sessions were too challenging or that the instructor pushed too hard; formal AE monitoring was not described.

## Original Sources

- [PubMed](https://pubmed.ncbi.nlm.nih.gov/32357869/) (pubmed)
- [DOI](https://doi.org/10.1186/s12889-020-08740-3) (doi)
- [PMC full text](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7195754/) (full text)

## Agent Guidance

Preserve the paper-level scope of this note. Do not generalize beyond the population, protocol, measured outcomes, and limitations above.