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Many people feel a renewed mood after exercise. The researchers found that replacing sedentary time with 15 minutes of vigorous physical activity can actually reduce the chances of depression by about 26%. ( pixabay )
Many studies have badociated high levels of physical activity with reduced rates of depression, but is it physical activity that reduces the risk of depression or depression that reduces levels of physical activity? ? A new study may have come up with the answer.
Physical activity and depression
By examining hundreds of thousands of genetic data, researchers found that people with high levels of physical activity were actually less likely to develop depression. In fact, researchers found that any activity was better than no activity at all and that replacing sedentary time with 15 minutes of vigorous physical activity each day could actually reduce the risk of depression. 39, about 26%.
Genetic approach
For this study, the researchers used Mendelian randomization, in which gene variants were used to study the effects of a non-genetic factor such as physical activity. In doing so, researchers were able to take a less biased approach to examining the relationship between physical activity and depression. In addition, he can also see the exact relationship between the two factors, thereby determining which of the two actually affects the other.
For physical activity, participants either had to report on their physical activity or wear an accelerometer to measure it. The results showed that physical activities based on an accelerometer protect against the risk of depression. This may be due to inaccuracies in the report of those who reported their physical activity, while those who used accelerometers had more objective readings.
Relationship of cause and effect
The results show that higher levels of physical activity can actually reduce the risk of depression. The researchers also found no cause-and-effect relationship in the opposite direction between physical activity and depression.
According to the researchers, their results show the importance of an objective measure of physical activity in mental health studies and support for physical activity as an effective strategy against depression.
"It's important to know if an badociated factor actually causes a result because we want to invest in prevention strategies that really work," said lead author Karmel Choi, PhD.
The study is published in JAMA Psychiatry.
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