Human Brains Need to Work Hard to Fight the Need to be Lazy

Human brains need to work hard to fight the need to be lazy which is what the brain usually prefers, finds a new study.

Human brains have been found to use a whole lot of brain resources to fight the Need to be lazy which is hardwired, finds a new study. The findings of this study are published in the Genes & Development journal.

The brain is where Matthieu Boisgontier and his colleagues went looking for answers to what they call the "exercise paradox": for decades, society has encouraged people to be more physically active, yet statistics show that despite our best intentions, we are actually becoming less active.

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‘Since the brain is innately attracted to sedentary behaviors, it tends to use a lot of brain resources, to avoid physical inactivity.’

The research findings, published recently in Neuropsychologia, suggest that our brains may simply be wired to prefer lying on the couch.

"Conserving energy has been essential for humans' survival, as it allowed us to be more efficient in searching for food and shelter, competing for sexual partners, and avoiding predators," said Boisgontier, a postdoctoral researcher in UBC's brain behaviour lab at the department of physical therapy, and senior author of the study. "The failure of public policies to counteract the pandemic of physical inactivity may be due to brain processes that have been developed and reinforced across evolution."

For the study, the researchers recruited young adults, sat them in front of a computer, and gave them control of an on-screen avatar. They then flashed small images, one a time, that depicted either physical activity or physical inactivity. Subjects had to move the avatar as quickly as possible toward the pictures of physical activity and away from the pictures of physical inactivity--and then vice versa.

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Meanwhile, electrodes recorded what was happening in their brains. Participants were generally faster at moving toward active pictures and away from lazy pictures, but brain-activity readouts called electroencephalograms showed that doing the latter required their brains to work harder.

"We knew from previous studies that people are faster at avoiding sedentary behaviors and moving toward active behaviors. The exciting novelty of our study is that it shows this faster avoidance of physical inactivity comes at a cost--and that is increased involvement of brain resources," Boisgontier said. "These results suggest that our brain is innately attracted to sedentary behaviors."

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The question now becomes whether people's brains can be re-trained.

"Anything that happens automatically is difficult to inhibit, even if you want to because you don't know that it is happening. But knowing that it is happening is an important first step," Boisgontier said.

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Source-Eurekalert