Overweight Prevalence Changes Before and After COVID-19 in Spain: The PESCA Program Longitudinal Outcomes 2018-2021.

Overweight prevalence in Spain reached critical levels before the COVID-19 pandemic, which likely exacerbated this issue. The PESCA (Programa Escolar de Salud Cardio-vascular) program is a multicomponent school-based intervention, launched in 2018 with the aim of tackling this health problem and reducing overweight rates in youth. (1) To analyze the efficacy of the PESCA program intervention on body composition, overweight prevalence, physical activity (PA)/sport practice, resting time, and screentime before COVID-19 and (2) to evaluate the impact of COVID-19 and the associated lockdown measures on these parameters in the studied sample. This longitudinal study included 207 children and adolescents from schools in Madrid (aged 2.82 to 15.84 years; 44.4% girls), with measurements taken at three time points: two before COVID-19 and one after its onset. Overweight prevalence, body fat percentage diagnosis, physical activity, resting time, and screentime were assessed. Cochran's Q test and repeated-measures ANOVA were used to compare outcomes across the three assessment time points. Overweight prevalence remained stable among children in the PESCA program before COVID-19 (17.87% to 19.81%). However, a significant increase was observed from point 2 to point 3, post-COVID-19 onset (19.81% to 26.57%). Similarly, healthy body composition significantly deteriorated from 63.16% at point 2 to 52.48% at point 3. PA/sport practice prevalence significantly increased until COVID-19 onset (80.19% to 91.22%) but declined thereafter (91.22% to 79.10% from point 2 to point 3). Although the differences were small, resting time significantly decreased post-COVID-19 onset (from 10.18 h at point 2 to 9.96 h at point 3), with no changes in the first period. Non-academic screentime showed a similar pattern: stable before COVID-19 and significantly increased after its onset (1.61 h at point 1; 1.70 h at point 2; 2.29 h at point 3). The PESCA program positively impacted PA/sport practice prevalence and may have provided some protection against overweight and related variables during the pre-COVID period. However, health authorities' restrictions and lockdown policies during COVID-19 negatively affected the health and lifestyle variables studied, offsetting previous improvements.