Longer work hours linked to higher obesity in OECD study

What's happened

An international study presented at ECO 2026 finds that countries with longer annual working hours tend to have higher obesity rates. Reducing hours by 1% is linked to a 0.16% drop in obesity, though causation is not proven. UK obesity sits around 26.8%.

What's behind the headline?

Key points

• The study has found an association between longer working hours and higher obesity rates across OECD countries, with a 1% reduction in annual hours associated with a 0.16% decrease in obesity.
• Researchers emphasise this is an association, not causation; other factors like GDP per capita and urbanisation may influence results.
• Experts argue policy shifts like reduced working hours could improve health outcomes, though governments remain cautious.

What this means for readers

• Time poverty and work-related stress are highlighted as potential drivers of unhealthy eating and lower physical activity.
• Policy debates on shorter working weeks gain continued relevance in improving public health.

Next steps

• Follow-up studies may test causal links and identify which worker groups benefit most.
• Governments may assess flexible scheduling and wellness programmes as interim measures.

How we got here

The European Congress on Obesity (ECO 2026) in Istanbul has analysed data from 33 OECD countries spanning 1990–2022 on working patterns and obesity. The findings show higher obesity in nations with longer annual hours and suggest time-poverty and stress as possible mechanisms. Income, urbanisation, and GDP per capita are linked to obesity variations across countries.

Our analysis

The Independent has reported on ECO 2026 findings linking long working hours with obesity, noting a 0.16% obesity decrease per 1% cut in annual hours; The Guardian and The Mirror cover similar results with emphasis on four-day weeks as potential policy responses. URL references: independent.co.uk; theguardian.com; mirror.co.uk.

Go deeper

• Will governments move toward a four-day week to address obesity?
• Which demographics benefit most from reduced hours—office workers or manual laborers?

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