Researchers in Finland used accelerometers to study how the 24-hour movement behaviors, including sleep, sedentary behavior, light physical activity and moderate-to-vigorous physical activity change in relation to each other when a person retires.
The results were published in the International Journal of Behavioral Nutrition and Physical activity.
The Finnish Retirement and Aging study FIREA of the University of Turku results show an increase in the amount of sleep, which contributed to decreased amount of physical activity.
The 24-hour activity behaviors can be divided into different sections, including sleep time, sedentary time, light physical activity and moderate-to-vigorous physical activity. Increasing the time spent on one section will inevitably lead to a decrease in at least one other section, as there is a limited number of hours in a day. The study conducted at the University of Turku, Finland, used sensitive accelerometers and compositional data analysis as the statistical method to study the simultaneous changes in these daily behaviors.
When studying people who retired from manual work or the service industry, the amount of sleep and sedentary behavior increased in relation to physical activity. This change was stronger in women than in men. As for people who had retired from non-manual work, the proportion of sleep increased in relation to physical activity and sedentary time. Moderate-to-vigorous physical activity decreased more than light physical activity.
“The decrease in the amount of physical activity is probably explained by the absence of activity related to work duties and commute to and from work when a person retires. These are replaced to some extent by sleep and, in the case manual workers, also sedentary time,” says the primary author and postdoctoral researcher Kristin Suorsa, in a statement.
More moderate-to-vigorous activity to retirement days
Previous research shows that replacing moderate-to-vigorous physical activity with any other movement behavior predisposes people to cardiovascular diseases and type 2 diabetes.
“Based on our research, people who are retiring should aim to increase the amount of physical activity, particularly moderate-to-vigorous activity. At the same time, long periods of sedentary time should be avoided and sitting should be divided into shorter periods with frequent walking breaks,” says Suorsa.
The Finnish Retirement and Aging study (FIREA) was started at the University of Turku in 2013, and its main goal is to investigate the changes in living habits, health and functional capacity as well as the factors affecting them in the age of retirement. The study is led by professor of public health and epidemiology Sari Stenholm.
The results are based on a population of 551 people working in the municipal sector who used a wrist-worn accelerometer around the clock for a week at the same time of the year before and after they retired. The accelerometer measures acceleration and allows the researchers to measure daily sleep, sedentary time, and physical activity.
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