Physical activity (PA) refers to bodily movements that result in a significant increase in energy expenditure due to the contraction of skeletal muscles. Physical inactivity has become a major global public health concern and is currently the fourth leading cause of death worldwide. The World Health Organization (WHO) recommends that adults engage in at least 150 minutes of moderate-intensity physical activity (MPA) or 75 minutes of vigorous-intensity physical activity (VPA) per week.
Although some studies suggest that individual differences in PA may have a genetic basis, PA is generally considered to be largely under voluntary control and influenced by climatic and environmental factors. For instance, extreme temperatures-either hot or cold-can increase health risks and reduce individuals' willingness to engage in physical activity. In addition, air pollution, particularly fine particulate matter (PM2.5), poses serious health risks. Exercising in polluted environments may trigger asthma, cardiovascular, or pulmonary conditions.
Since the Industrial Revolution, fossil fuel emissions have contributed to a global surface temperature increase of approximately 1.1°C, with projections suggesting a further rise of 2.5-2.9°C by the end of the century. At the same time, PM2.5 pollution has become a pressing issue, contributing to an estimated 7 million deaths globally in 2012-over one-third of which occurred in rapidly developing Asian countries.
Given the seasonal and geographic variability in climate and air quality, physical activity levels are likely to be affected accordingly.This study aims to investigate the extent to which climatic and environmental factors influence physical activity levels and intensity.
Aged 18 to 55 years
Residing in Shenzhen or Shenyang for the entire year
Disabilities that limit physical activity
Any condition preventing participation in physical activity
Pregnant or planning pregnancy during the study period
Lactating or planning to lactate during the study period
The study population consisted of healthy individuals. Female participants were neither pregnant nor planning to become pregnant, and none were lactating. All subjects were free from serious illnesses or disabilities that could interfere with the study.
Cohort
Cross-sectional
Not listed
Physical activity level
Physical activity in vector magnitude counts will be recorded using GT3X accelerometer worn near the hip for a consecutive period of 7 days. The monitor should not be worn while bathing or swimming.
Temperature
Temperature in degrees Celsius will be collected using the HOBO mini-weather station.
Humidity
Humidity in %RH will be collected using the HOBO mini-weather station.
Subject exposure to environmental temperature
Exposure temperature in degrees Celsius will be measured by Ibutton. The Ibutton (DS1921G) monitors will be provided for the assessment of both indoor and outdoor temperature of their living environment. The iButtons be affixed to the hand bag to measure the subject exposure temperature.
PM2.5
PM2.5 in μg/m3 will be collected through open data website.
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Shenzhen Institutes of Advanced Technology ,Chinese Academy of Sciences
Lead sponsor
China Medical University, China
Collaborator
