Aims: This study aimed to describe the prevalence and socio-demographic and lifestyle-related correlates of muscle-strengthening activity (MSA; strength/resistance training, sit-ups/push-ups, etc.) among a large sample of European adolescents. Methods: Data were drawn from the European Health Interview Survey Wave 2 (2013–2014), including 8818 adolescents (15–17 years) from 28 European countries. Self-reported MSA was assessed using a previously validated survey item. Population-weighted prevalence ratios were calculated for (a) ‘none’ (0 days/week), (b) ‘insufficient MSA’ (1–2 days/week) or (c) ‘sufficient MSA’ (⩾3 days/week). Generalised linear models using Poisson regression with robust error variance were used to calculate the prevalence ratios for adolescents reporting sufficient MSA by socio-demographic/lifestyle characteristics and by European region. Results: Overall, 19.4% (95% confidence interval (CI) 18.3–20.7) reported sufficient (⩾3 days/week) MSA and 57.9% (95% CI 56.4–59.6) reported none. Females, adolescents from Southern and Eastern European regions, those not meeting the aerobic guideline and adolescents classified as overweight were significantly associated with a lower likelihood of reporting sufficient MSA, independent of other characteristics. Conclusions: The majority of European adolescents do not meet the MSA guidelines. Future large-scale MSA public-health interventions should target female and currently inactive adolescents, as well as those from Southern and Eastern European regions.
Precise asymptotics for the first moment of the error variance estimator in linear models
