Band 8 model answer

The rise in chronic diseases associated with physical inactivity is one of the most pressing public-health challenges of the twenty-first century. To address it effectively, it is necessary to understand both why sedentary behaviour has increased and what can be done to reverse the trend.

Modern working life is a central cause. The shift from manufacturing and agriculture towards desk-based service-sector employment means that many adults now spend eight or more hours per day seated, with little opportunity for incidental physical activity. Beyond the workplace, ubiquitous digital entertainment, streaming platforms, video games and social media, has replaced the active leisure pursuits of previous generations. Car dependency in suburban and rural environments further reduces the walking and cycling that once formed an organic part of daily routines.

The health consequences are well established. Prolonged inactivity is closely associated with type-2 diabetes, cardiovascular disease and certain cancers, placing enormous strain on health systems and reducing the quality of life of millions.

Several strategies deserve priority. Urban planning policies that create walkable neighbourhoods, safe cycling lanes and accessible green spaces can build physical activity into everyday life rather than treating it as a deliberate choice. Employers can be encouraged, through tax incentives, to introduce standing desks, on-site gyms and paid activity breaks. Schools play a crucial role: restoring mandatory daily physical education and limiting screen time during school hours would instil healthy habits from an early age. Public-health campaigns that frame inactivity as a specific, avoidable risk, comparable in messaging to anti-smoking initiatives, have also proved effective in shifting population-level behaviour.

Ultimately, reducing sedentary behaviour requires environmental changes that make activity the path of least resistance rather than an effortful exception.