A study published in the The Lancet Global Health highlights that rising temperatures due to climate change could significantly reduce physical activity worldwide by 2050, posing serious public health and economic risks.
Key Findings
| Indicator | Projection by 2050 |
| Additional deaths | 4.7–7 lakh annually |
| Productivity losses | USD 2.4–3.68 billion |
| Rise in inactivity | Linked to extreme heat exposure |
- Every additional month with temperatures above 27.8°C could increase:
- Global inactivity by 1.5 percentage points
- In low & middle-income countries by 1.85 percentage points
Key Insight
- Physical activity is no longer just a lifestyle choice- it is becoming a climate-sensitive public health necessity.
- Without intervention, rising temperatures could trigger a global shift towards sedentary lifestyles, increasing both health risks and economic losses.
Global Health Concern
Physical inactivity is already widespread:
- Around 1 in 3 adults do not meet activity guidelines
- World Health Organization aims to reduce inactivity by 15% by 2030, but climate change may undermine this target
Rising heat limits:
- Outdoor exercise
- Safe working conditions
- Daily mobility
India’s Scenario
- Projected mortality due to inactivity: 10.62 deaths per 1 lakh population by 2050
- Impact expected under:
- Low emissions
- Business-as-usual trends
- Fossil-fuel intensive growth
Regional Impact
- Most affected regions: Caribbean, Southeast Asia, Central America, Eastern Sub-Saharan Africa
In these areas, inactivity could rise by over 4% per month during extreme heat periods.
- Tropical and subtropical regions face: Conditions where activity may be limited to minimal movement (sitting/lying)
WHO Physical Activity Guidelines
Adults (18–64 years) should:
- Do 150 minutes moderate or 75 minutes vigorous activity per week
- Include muscle-strengthening exercises at least twice weekly
Why It Matters
Reduced physical activity leads to:
- Higher risk of: Cardiovascular diseases, Diabetes, Obesity
- Decline in: Cognitive performance, Productivity
- Increase in: Absenteeism and healthcare burden
Physical inactivity is a major modifiable risk factor for non-communicable diseases.
Way Forward
The study suggests integrating climate and health strategies:
- Heat-sensitive exercise guidelines
- Development of: Climate-resilient urban design and Shaded public spaces
- Access to: Cooled exercise facilities
- Strong workplace heat-safety norms