Due to lack of high quality studies and often only one manuscript reporting on a particular determinant , we concluded " insufficient evidence " for most associations between determinants and physical activity or exercise .
Background The health benefits of regular physical activity and exercise have been widely acknowledged .
Unfortunately , a decline in physical activity is observed in older adults .
Knowledge of the determinants of physical activity ( unstructured activity incorporated in daily life ) and exercise ( structured , planned and repetitive activities ) is needed to effectively promote an active lifestyle .
Our aim was to systematic ally review determinants of physical activity and exercise participation among healthy older adults , considering the method ological quality of the included studies .
A comparison of questionnaire, accelerometer, and pedometer: measures in older people.
PURPOSE To compare ( i ) the convergent validity of the self-report Zutphen Physical Activity Question naire with the 7-d objective physical activity ( PA ) measurement by accelerometers and pedometers and ( ii ) the construct validity of these measures by examining their associations with physical health and psychological and anthropometric variables . METHODS Five hundred and sixty community-dwelling people aged > or = 65 yr were invited from a UK primary care practice and 238 ( 43 % ) participated ( mean age = 74 , 53 % male ) .  PA was assessed subjectively by the Zutphen question naire ( modified to include housework questions ) and objective ly by the 7-d accelerometer monitoring : a r and om half also had a pedometer . A question naire assessed health , disability , and psychological factors , and anthropometric assessment was performed . RESULTS Mean daily PA levels were as follows : Zutphen = 9.1 kcal x kg(-1 ) x d(-1 ) ( SD = 6.6 kcal x kg(-1 ) x d(-1 ) ) ; accelerometer activity count = 226,648 ( SD = 121,966 ) ; accelerometer step count = 6495 ( SD = 3212 ) ; and pedometer step count = 6712 ( SD = 3526 ) . Zutphen score was moderately correlated with accelerometer activity count ( R = 0.34 , P < 0.001 ) and pedometer step count ( R = 0.36 , P < 0.001 ) . Pedometer step count was highly correlated with accelerometer activity count ( R = 0.82 , P < 0.001 ) and accelerometer step count ( R = 0.86 , P < 0.001 ) . Objective PA measures showed strong associations with health and anthropometric and psychological variables . Zutphen score was not significantly related to most health or anthropometric measures but was associated with psychological variables and provided information about activity type . CONCLUSIONS Convergent validity was strong between accelerometers and pedometers but weaker between these and self-report Zutphen . Pedometers may be preferred to accelerometers for simple studies due to their lower cost . Objective measures had better construct validity , being more strongly associated with established PA determinants , and thus offered better value to research ers than the question naire , but the latter provided useful detail on activity type , so a combined approach to PA assessment may be preferable
Due to lack of high quality studies and often only one manuscript reporting on a particular determinant , we concluded " insufficient evidence " for most associations between determinants and physical activity or exercise .
Background The health benefits of regular physical activity and exercise have been widely acknowledged .
Unfortunately , a decline in physical activity is observed in older adults .
Knowledge of the determinants of physical activity ( unstructured activity incorporated in daily life ) and exercise ( structured , planned and repetitive activities ) is needed to effectively promote an active lifestyle .
Our aim was to systematic ally review determinants of physical activity and exercise participation among healthy older adults , considering the method ological quality of the included studies .