Yes. I also see problems in other areas: -they didn’t define the threshold for sedentary behavior beforehand, so it could be they just move the threshold to hac

Yes. I also see problems in other areas: -they didn’t define the threshold for sedentary behavior beforehand, so it could be they just move the threshold to hack the p-value. At least, they could analyze with different thresholds then publish the results open for interpretation. - they didn’t control the effect of normal aging in older people. 7 years is a long period and by older people we can expect a decline in cognitive performance regardless of their life style. What we interest is however how much the sedentary live style contributes additionally to this decline. - because the authors rely solely on the smartwatch data and put all kinds of movements together (sitting, walking around, laying down), we can not see whether changing posture and moving around can help. - most importantly, they didn’t isolate and control for the amount of cognitive work. Doing cognitive demanding work is known to delaying worsening symptoms in AD and related diseases.