Change your chair for fresh air: Investigate the relationship between sitting time and cardio health

Summary: Those who sit for six or more hours a day suffer from heart disease and premature death.

A source: Simon Fraser University

New research adds weight to the argument that prolonged sitting can be harmful to health.

An international study of more than 100,000 people in 21 countries found that people who sat for 6-8 hours a day had a 12-13 percent higher risk of premature death and heart disease, while those who sat for more than eight hours a day had a higher rate. Up to 20 percent.

A joint study by Scott Lear, a professor of health sciences at Simon Fraser University, and Wei Li of the Beijing Chinese Academy of Medical Sciences was published in the journal Today. JAMA Cardiology.

Their study followed people for an average of 11 years, and found that long sitting periods were associated with an increased risk of early death and cardiovascular disease. While sitting is a problem in all countries, it is especially common in low- and middle-income countries.

“The key message here is to reduce how much you sit,” Lear says. “If you have to sit, exercising more at other times of the day compensates for that risk.”

Not surprisingly, those who sat the most and those who were least active had the highest risk – up to 50 percent, and those who sat the most but were the most active had a risk of about 17 percent.

Not surprisingly, those who sat the most and those who were least active had the highest risk – up to 50 percent, and those who sat the most but were the most active had a risk of about 17 percent. Image in public domain

“For those who sit for more than four hours a day, replacing half an hour with exercise reduces the risk by two percent,” Lear says. “If only one in four Canadians responds to action guidelines, there is a real opportunity for people to increase their activity and reduce their risk of early death and heart disease.”

The study found a specific association in low-income countries, and researchers suggest that living in high-income countries may be related to socioeconomic status and well-paid employment.

Lear noted that clinics need to focus on less sitting and more movement, as this is a low-cost intervention that can bring huge benefits.

Lear adds that if clinicians need to be notified of resistance to work, people need to be more aware of their lifestyle and take their health seriously. “Our study found that the combination of sitting and immobility accounted for 8.8 percent of all deaths, which is close to the contribution of smoking” (Lear and Lee’s study, 10.6 percent). “This is a global problem that can be easily fixed. Scheduling time to get out of this chair is a great start. ”

News about the study of cardiovascular diseases

Author: Press service
A source: Simon Fraser University
The connection: Press Service – Simon Fraser University
Photo: Image in public domain

Original study: Closed access.
“Association of sitting time with mortality and cardiovascular events in high-income, middle-income, and low-income countries,” Sidong Lee et al. JAMA Cardiology


Association of deaths and cardiovascular events in high-income, middle-income and low-income countries

an important

It is associated with increased risk of cardiovascular disease (CVD) and death in high-income countries, but it is unknown whether it will increase in low- and middle-income countries.

The goal

To study the association of sedentary time with mortality and major CVD in countries of different economic levels using data from a future Urban Rural Epidemiology study.

Design, installation and participants

See also

It shows the brain of a light bulb and an alarm clock

This population-based cohort study included participants aged 35 to 70 years from January 1, 2003, and an average follow-up of 21.1 years in 21 high-, middle-, and low-income countries as of August 31, 2021.


Daily sitting time is measured using the International Physical Activity Questionnaire.

Key results and measures

The sum of deaths from all causes and the main CVD (defined as cardiovascular death, myocardial infarction, stroke or heart failure).


Of the 105,677 participants, 61,925 (58.6%) were women and the average (SD) age was 50.4 (9.6) years. During the 11.1 (IQR, 8.6–12.2) annual follow-up, 6233 deaths and 5696 major cardiovascular events (2349 myocardial infarction, 2966 stroke, 671 heart failure and 1792 cardiovascular deaths) were documented. Compared to the referendum group (<4 hours per session), more sitting time (саат8 hours per day) was associated with an increased risk of a composite outcome (risk ratio). [HR], 1.19; 95% CI, 1.11-1.28; Pfor trend <.001), mortality due to all causes (HR, 1.20; 95% CI, 1.10-1.31; Pfor trend <.001) and core CVD (HR, 1.21; 95% CI, 1.10-1.34; Pfor trend <.001).

When the country was stratified by income level, the correlation of sitting time with the combined outcome was stronger in low-income and low-income countries (≥8 hours: HR, 1.29; 95% CI, 1.16–1.44). high-income and mid-income countries (HR, 1.08; 95% CI, 0.98-1.19; Pfor interaction = .02). Participants who sat 8 hours or more per day experienced a 17% to 50% higher risk of composite outcomes compared to those who sat less than 4 hours per day and reported higher levels of physical activity; and the risk decreased with increasing levels of physical activity.

Conclusions and relevance

In different economic conditions, especially in low-income and low-income countries, the length of stay is associated with an increased risk of death from all causes and traffic accidents. Reducing downtime and increasing physical activity could be important strategies to alleviate the global burden of premature deaths and HIV.

Leave a Comment

Your email address will not be published.