Researchers project that reduced activity could contribute to half a million additional premature deaths annually by 2050
Rising temperatures are making physical activity undesirable and even dangerous in many parts of the world, and as global heating worsens, it will further affect how much people are able to move.
Researchers analysed data from 156 countries between 2000 and 2022 and modelled how rising temperatures may affect physical activity globally by 2050.
They found that each additional month with an average temperature above 27.8C would increase physical inactivity by an average of 1.5 percentage points globally, with an even higher increase of 1.85 points in low and middle-income countries.
Physical inactivity increases the risk of cardiovascular disease, type 2 diabetes, certain cancers and mental health disorders, all of which shorten life expectancy, said the study’s lead author, Christian García-Witulski, a research fellow at the Lancet Countdown Latin America and a professor at the Pontifical Catholic University of Argentina.
