Getting Girls Moving: What Actually Works to Recruit Teenage Girls Into Physical Activity Programmes

You’ve designed the perfect physical activity programme for teenage girls. It’s fun, evidence-based, and addresses every barrier they face. But when you open registration, only a fraction sign up. If girls don’t join, they cannot benefit — and this “recruitment gap” has quietly undermined adolescent health interventions for years.

A landmark systematic review published in BMC Public Health by researchers at Trinity College Dublin provides the first quantitative synthesis of what actually works to recruit adolescent girls into physical activity (PA) programmes. After screening over 15,000 records and analysing 27 randomised controlled trials, the findings offer clear, actionable guidance for schools, community programmes, and researchers.

The takeaway? Teacher involvement is gold. Student incentives are fool’s gold. And how you frame your programme matters as much as the activities themselves.

Why Recruiting Teenage Girls Is So Difficult — And So Important

Adolescence is a critical window for establishing lifelong health habits. Physical activity during these years supports cardiovascular health, bone density, mental wellbeing, academic performance, and healthy weight maintenance. Yet globally, only 15% of adolescent girls meet the WHO recommendation of at least 60 minutes of moderate-to-vigorous physical activity daily — a persistent 7% gender gap that spans 146 countries.

The COVID-19 pandemic made this worse, accelerating declines in youth activity levels. While innovative PA programmes have been developed — many co-designed with girls themselves — a frustrating pattern has emerged: even the best-designed programmes fail if nobody enrols. Programme providers report signing up just 10-29% of eligible girls despite extensive recruitment efforts.

This systematic review set out to answer three questions: What recruitment rates can programmes realistically expect? Which strategies are actually being used? And — most importantly — which strategies are associated with better outcomes?

How the Study Was Conducted

The research team conducted a comprehensive systematic review following PRISMA guidelines. They searched five major databases (Embase, Medline, CINAHL, Web of Science, Cochrane Library) plus citation hand-searches, identifying 15,100 records. After removing duplicates and screening, 27 randomised controlled trials met inclusion criteria — all involving girls aged 10-19 years, with PA interventions lasting at least 4 weeks.

Importantly, only 5 of 27 studies reported complete recruitment data using the SEAR framework (Screened, Eligible, Approached, Randomised). This inconsistent reporting is itself a finding: the research community needs better standards for tracking and sharing how participants are recruited.

What the Numbers Reveal About Recruitment Rates

Across 18 studies where recruitment rates could be calculated, the mean was 62.6% (±27.8). But this average conceals wide variation — and several important patterns emerged.

Age matters significantly. Younger adolescent girls (ages 11–14) were recruited at notably higher rates (65.9%) than older teens (51.2%). This mirrors the well-documented decline in physical activity as girls move through adolescence, driven by shifting social dynamics, academic pressure, and competing interests.

Socioeconomic status matters even more. Programmes serving low-SES populations achieved mean recruitment of just 56.5% — compared to 63.2% in mixed-SES groups. Girls from lower-income households face disproportionate barriers: cost, transport, safety concerns, and facility access. Yet remarkably, only 2 of 27 studies were conducted in the Global South, revealing a critical geographic evidence gap.

Teacher Involvement: The Single Most Powerful Recruitment Strategy

Across multiple analyses, teacher and school involvement consistently emerged as the strongest predictor of recruitment success. The findings were remarkably coherent:

• RCTs with active teacher participation in recruitment observed the highest mean recruitment rates
• Recruitment rates were significantly higher when teachers were the PA instructors (R²=0.283, p=0.041)
• The percentage of recruitment goal achieved was significantly higher when schools or teachers were financially supported to organise recruitment (R²=0.322 in all studies, R²=0.458 in school-based studies)
• Studies that met their recruitment goals were more likely to have schools actively involved (30.8% successful programmes vs 16.7% unsuccessful)

This finding has practical implications. If you have limited resources for recruitment, investing in teacher engagement — including financial support for their time — appears far more effective than spending on student-facing incentives or materials.

The Surprising Finding: Student Incentives Backfire

Perhaps the most counterintuitive finding of the review: offering incentives directly to adolescent girls was associated with the lowest recruitment rates (mean 51.2%) and significantly reduced retention in school-based studies.

This aligns with Self-Determination Theory: when young people participate because of external rewards rather than genuine interest, their motivation and long-term engagement suffer. The message is clear: spend your recruitment budget on enabling teachers and creating great experiences, not on bribing participants.

However, there’s an important nuance: financially incentivising schools and teachers (rather than students) was associated with higher recruitment goal achievement. Provided ethical standards are upheld — avoiding undue pressure on adolescents — this appears to be a smart resource allocation strategy.

What Programme Design Factors Matter?

Beyond recruitment strategies, the review identified several programme design elements associated with better enrolment:

Interventions aiming to reduce depression recruited lower percentages of their goals (R²=0.465, p=0.001) — highlighting the inherent challenge of engaging adolescents with depression in PA, despite robust evidence that exercise benefits mental health.

BMI-focused programmes showed mixed associations: positively linked with recruitment rate (R²=0.308, p=0.017) but negatively correlated with meeting recruitment goals in school-based studies (r=0.533, p=0.041). This suggests weight-focused framing requires careful handling.

Researcher Engagement: Presentations and Taster Sessions Work

Active researcher involvement also mattered. Meeting recruitment goals was more likely when researchers delivered school presentations or “try-it” taster sessions (r=0.516, p=0.041). Conversely, peer instruction was negatively associated with meeting recruitment goals (r=0.472, p=0.048) — though this finding should be interpreted cautiously given the small sample.

The message: direct, interactive engagement with potential participants — showing them what the programme involves and letting them sample activities — appears more effective than passive recruitment methods like flyers, newsletters, or information packs.

Retention: The Good News

While recruitment is challenging, retention is considerably stronger. The mean retention rate across studies was 84.9% (±13.3) — meaning that once girls join a programme, most stay engaged.

School-based programmes achieved higher retention (86.0%) than non-school-based programmes (81.2%), emphasising that convenience of timing and location matters for keeping participants engaged.

Fitness testing was associated with improved retention (R²=0.243, p=0.020), possibly because girls valued monitoring their progress and developing mastery. Dance-based interventions, however, showed lower retention (R²=0.403, p=0.002) — highlighting the need to match activity types to participant preferences.

Practical Recommendations for Programme Providers

Based on this systematic review, here are actionable strategies for improving recruitment of adolescent girls into physical activity programmes:

Limitations and Gaps in the Evidence

The review’s findings come with important caveats. The evidence is overwhelmingly school-based (84.6% of included studies), limiting generalisability to community, online, or clinical settings. Recruitment strategies were rarely tested in isolation — they were bundled together — making it impossible to determine causal effects of individual approaches.

Only 2 of 27 studies came from the Global South, and low-SES populations were underrepresented. Given that adolescent girls in low-income settings face the highest inactivity levels and greatest recruitment challenges, this is a critical evidence gap requiring urgent attention.

The authors stress that all quantitative comparisons should be interpreted as hypothesis-generating rather than confirmatory. These findings indicate associations that warrant further testing, not definitive proof of causation.

What This Means for the Future of Adolescent Girls’ Physical Activity

This systematic review represents an important step forward in understanding how to reach adolescent girls with physical activity programmes. The finding that teacher engagement consistently outperforms student incentives should prompt immediate reconsideration of how recruitment budgets are allocated.

But the broader message is equally important: recruitment is not a minor implementation detail — it is a core determinant of programme reach and impact. A programme that cannot enrol participants cannot improve health, regardless of how evidence-based its content may be.

Future research must prioritise standardised recruitment reporting, inclusion of diverse socioeconomic and geographic contexts, and — ideally — randomised comparisons of recruitment strategies themselves. And the field needs to look beyond RCTs to understand recruitment into real-world, voluntary PA programmes that operate outside research settings.