Story perspectives

Study Links Sedentary Behavior to Increased Dementia Risk

4/6/2026

Summary

Story summary

A study in the American Journal of Preventive Medicine shows that sedentary behaviors influence dementia risk by cognitive engagement.
Researchers followed more than 20,000 adults in Sweden for nearly two decades.
Mentally passive activities such as watching television increased dementia risk.
Mentally engaging activities reduce dementia risk and boost cognitive health when accompanied by social interaction.
A separate long-term study indicates speed-based cognitive training could lower dementia risk by 25%.

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Story summary

A study in the American Journal of Preventive Medicine shows that sedentary behaviors influence dementia risk by cognitive engagement.
Researchers followed more than 20,000 adults in Sweden for nearly two decades.
Mentally passive activities such as watching television increased dementia risk.
Mentally engaging activities reduce dementia risk and boost cognitive health when accompanied by social interaction.
A separate long-term study indicates speed-based cognitive training could lower dementia risk by 25%.