Association of healthy lifestyle on overweight and obesity among adolescents in Luxembourg

Background
Adolescent overweight and obesity are significant public health challenges. Understanding the impact of healthy lifestyle behaviours is crucial for effective intervention strategies. The aim of this study is to analyse the association between healthy lifestyle behaviours with overweight and obesity among adolescents in Luxembourg.

Methods
The study was based on the HBSC Luxembourg 2022 survey and includes 8415 adolescents aged 11 to 18 years. Adolescents self-reported the frequency of fruit and vegetable consumption, physical activity, height, and body mass. Eating and physical activity behaviours were categorized based on WHO recommendations. Body Mass Index categorization followed International Obesity Task Force criteria. Binomial logistic regression of obesity and overweight with the interaction between healthy diet and physical activity was performed, controlling for age, gender, family affluence, migration background, and family structure.

Results
The results indicated a significant protective effect of healthy lifestyle behaviours against overweight and obesity. For overweight, adolescents engaging in either fruit and vegetable consumption (OR = 0.829, 95% CI [0.697-0.986]) or physical activity (OR = 0.719, 95% CI [0.566-0.913]) showed reduced odds compared to those with unhealthy behaviours. For obesity, similar associations were observed. Adolescents engaging in physical activity (OR = 0.407, 95% CI [0.235-0.705]) showed reduced odds compared to those with unhealthy behaviours. Combining both behaviours resulted in the lowest risk of obesity (OR = 0.366, 95% CI [0.177-0.760]) and overweight (OR = 0.473, 95% CI [0.340-0.658]).

Conclusions
Promoting health eating and physical activity behaviours are important strategies for preventing overweight and obesity in youth in Luxembourg. Implementing targeted interventions aimed to promote these behaviours could mitigate the burden of overweight and obesity in this population.

Key messages
• Healthy lifestyle matters: Fruit and vegetables consumption or regular physical activity significantly reduce the risk of overweight and obesity among adolescents.
• Combining behaviours counts: Concurrent engagement in both fruit and vegetables consumption and physical activity offers the greatest protection against overweight and obesity.