Summary Sedentary behaviour is associated with lower cognitive performance , although the attributable risk of sedentary time to all-cause dementia incidence is unclear .
Our systematic review provides evidence that limiting sedentary time and concomitantly engaging in regular moderate-to-vigorous physical activity may best promote healthy cognitive ageing
Aim The increasing rate of all-cause dementia worldwide and the lack of effective pharmaceutical treatments emphasise the value of lifestyle approaches as prevention strategies .
Emerging evidence suggests sedentary behaviour is associated with impaired cognitive function .
A better underst and ing of this association would significantly add to our knowledge of how to best promote healthy cognitive ageing .
Thus , we conducted a systematic review ascertaining the contribution of sedentary behaviour towards associated changes in cognitive function over the adult lifespan .
Self-administered questionnaire compared with interview to assess past-year physical activity.
PURPOSE The Modifiable Activity Question naire ( MAQ ) is a physical activity question naire shown to be both valid and reliable and was initially design ed to be interviewer-administered . After translation and adaptation into French , the objective of the study was to compare past-year physical activity data obtained by self-administration of this question naire and by interviewer-administration . METHODS 84 subjects ( 22 men , 62 women , age 36 - 63 yr ) enrolled in an ongoing prospect i ve study in France ( the SUpplementation en VItamines et Minéraux AntioXydants or SU.VI.MAX study ) completed both versions of the question naire in a r and omized order with a mean ( SD ) delay of 7.9 ( 5.8 ) d between the two modes . Past-year leisure and occupational physical activity were expressed as both h x wk(-1 ) and MET-h x wk(-1 ) of activity , and television watching was expressed as h x d(-1 ) . Analysis of variance on ranks was used to compare activity variables obtained by self-administration and interview . Agreement was assessed by nonparametric intraclass correlation coefficients . RESULTS A significant effect of the mode of administration was found only for past-year leisure physical activity with lower values reported in self-administered conditions compared with interview . However , a high level of concordance between the two modes of administration was observed for all variables as shown by the intraclass correlation coefficients : 0.90 for leisure physical activity ( h x wk(-1 ) ) , 0.82 for occupational activity ( h x wk(-1 ) ) , 0.83 for total ( leisure and occupational combined ) physical activity ( h x wk(-1 ) ) , and 0.97 for television viewing ( h x d(-1 ) ) . CONCLUSIONS The agreement between the two modes of administration of the question naire suggests that the self-administered version of the MAQ is a valuable tool to assess past-year physical activity and inactivity in self-administered conditions . This instrument could be used in large-scale population studies investigating the relationships between physical activity and health outcomes
Summary Sedentary behaviour is associated with lower cognitive performance , although the attributable risk of sedentary time to all-cause dementia incidence is unclear .
Our systematic review provides evidence that limiting sedentary time and concomitantly engaging in regular moderate-to-vigorous physical activity may best promote healthy cognitive ageing
Aim The increasing rate of all-cause dementia worldwide and the lack of effective pharmaceutical treatments emphasise the value of lifestyle approaches as prevention strategies .
Emerging evidence suggests sedentary behaviour is associated with impaired cognitive function .
A better underst and ing of this association would significantly add to our knowledge of how to best promote healthy cognitive ageing .
Thus , we conducted a systematic review ascertaining the contribution of sedentary behaviour towards associated changes in cognitive function over the adult lifespan .