COVID-19-related lockdowns and changes in overweight and obesity, movement behaviours, diet quality, and health-related quality of life among regional Australian primary school children: A repeat cross-sectional study

Pediatr Obes. 2025 Feb;20(2):e13195. doi: 10.1111/ijpo.13195. Epub 2024 Dec 18.

Abstract

Background: During the coronavirus disease 2019 (COVID-19) pandemic, the Australian state of Victoria (in particular, its capital, Melbourne) experienced some of the longest lockdowns in the world.

Objective: This repeated cross-sectional study examined changes between March to June 2019 (pre-pandemic) and April to August 2022 (6 to 11 months following pandemic-related lockdowns) in overweight and obesity prevalence, physical activity, sedentary behaviour, sleep, diet quality, and health-related quality of life (HRQoL) among primary school children in north-east Victoria, Australia.

Methods: Height and weight were measured for Grade 2, 4, and 6 students in 2019 (3889 children) and 2022 (1816 children). Grade 4 and 6 students self-reported on their movement behaviours, diet quality, and HRQoL.

Results: Participation declined among schools (2019:56%, 2022:34%) and students (2019:87%, 2022:75%). Compared to children in 2019, children in 2022 had a higher prevalence of overweight and obesity; were less likely to have met guidelines for moderate-to-vigorous physical activity, recreational screen time, and vegetable consumption; had higher intakes of takeaway food, energy-dense nutrient-poor snacks, and sugar-sweetened beverages; and had lower HRQoL.

Conclusion: Children's health-related behaviours and outcomes seemed not to have returned to pre-pandemic levels 6 to 11 months after the final lockdowns lifted for their communities. Continued monitoring and interventions targeting the drivers of childhood obesity are urgently needed.

Keywords: COVID‐19; children; obesity; physical activity; sedentary behaviour; sleep.

MeSH terms

  • COVID-19* / epidemiology
  • COVID-19* / prevention & control
  • Child
  • Cross-Sectional Studies
  • Diet / statistics & numerical data
  • Exercise*
  • Female
  • Humans
  • Male
  • Overweight / epidemiology
  • Overweight / psychology
  • Pediatric Obesity* / epidemiology
  • Pediatric Obesity* / prevention & control
  • Pediatric Obesity* / psychology
  • Prevalence
  • Quality of Life*
  • Quarantine / psychology
  • SARS-CoV-2*
  • Sedentary Behavior*
  • Victoria / epidemiology