While there are many reports around the world about the adverse effects of sitting time (sitting time) on health, large-scale studies focusing on Japanese sitting time are limited to limited conditions compared to other countries. Staying.Long sitting time causes poor blood circulation and decreased metabolism, and is associated with increased mortality and the development of cardiovascular disease.According to 2011 data (5,000 Japanese), Japanese weekdays The sitting time is the longest in the world.
This time, the research group led by Professor Akihide Koyama of Kyoto Prefectural University of Medicine used data that tracked more than 6 Japanese people for an average of 7.7 years as part of the Japan Multicenter Cohort Study (J-MICC study). The relationship between the length of sitting time during the day and the mortality rate (including all causes of death) was investigated.As a result, for the first time in a large-scale Japanese study, it was shown that the longer the sitting time, the higher the mortality rate.
Based on the questionnaire, the sitting time during the day was divided into 5 groups: (5) less than 7 hours, (7) 9 hours to less than 9 hours, (4) 2 hours to less than 15 hours, and (XNUMX) XNUMX hours or more.As a result of the analysis, the mortality rate increased by XNUMX% for every XNUMX hours of sitting time during the daytime for all subjects.
It was also found that the relationship between sitting time and mortality increases with the number of lifestyle-related diseases.For people with lifestyle-related diseases, the mortality rate increased by 2% for dyslipidemia, 18% for hypertension, and 20% for diabetes for every 27 hours of sitting time during the day. For those who own all three, it is said to be 3% higher.
Furthermore, we examined the relationship between the amount of physical activity during leisure time and the risk of death, and found that even if the amount of physical activity was increased, the effect of reducing the mortality rate by sitting time was slight.
In 2020, Kobayashi et al. Reported the relationship between sitting time and the onset of lifestyle-related diseases using the same data set as this analysis, but the relationship between sitting time and death was also clarified. The importance of shortening the sitting time has been suggested.
