Sedentary behavior inhibits quality sleep, which has been shown to impact memory.
I wonder if researchers tracked the quantity and quality of sleep (REM vs NREM) among study participants. From the graphs it doesn't look like they did.
Perhaps a sedentary person makes fewer notable memories (their surroundings don't change much), and the respective area of the brain atrophies?
" No significant correlations were observed between physical activity levels and MTL thickness. Though preliminary, our results suggest that more sedentary non-demented individuals have less MTL thickness. "
So, this wasn't conclusive? Just in case i may walk my dog twice as much but not much can be done with a software engineering job and sedentary hobbies.
Somewhat crazy idea but anyone know if sedentary behaviour or poor memory are associated with graying hair at the temples?
"Indeed, one can be highly active yet still be sedentary for most of the day. "
That's a hugely interesting note there in the introduction.