No impact of patient and intervention characteristics on the effect estimates were found .
Short conclusion Low quality of evidence was found for a moderate effect of physical activity monitor-based interventions on physical activity compared with control interventions .
Background The body of evidence related to the effect of physical activity monitor-based interventions has grown over the recent years .
However , the effect of physical activity monitor-based interventions in older adults remains unclear and should be systematic ally review ed .
Objective The objective of this systematic review was to estimate the effect of physical activity monitor-based interventions on physical activity behavior  in participants aged 65 and above .
Subsequently we explored the effect on body mass index , physical capacity , and health-related quality of life and finally the impact of patient- and intervention characteristics .
Can older adults improve the identification of moderate intensity using walking cadence?
Background The majority of older adults do not reach the physical activity guidelines . One possible explanation for this may be that older adults overestimate their physical activity levels , because they are unable to identify exercise intensity . Methods Forty-four older adults were recruited and r and omly assigned into two walking groups lasting 6 weeks . The intervention group was asked to walk a minimum of 150 min per week at moderate intensity using walking cadence indicated with a pedometer . The control group did not get any feedback on walking intensity . Results The ability to identify moderate intensity while walking did not significantly improve in neither groups ( p = 0.530 ) . However , participants in the intervention group increased significantly the time spent at moderate intensity , in 10 min bouts ( p < 0.01 ) . Discussion A pedometer providing walking cadence to reach moderate intensity is a good tool for increasing time walked at the recommended intensity , but not because participants know more what is considered moderate intensity
No impact of patient and intervention characteristics on the effect estimates were found .
Short conclusion Low quality of evidence was found for a moderate effect of physical activity monitor-based interventions on physical activity compared with control interventions .
Background The body of evidence related to the effect of physical activity monitor-based interventions has grown over the recent years .
However , the effect of physical activity monitor-based interventions in older adults remains unclear and should be systematic ally review ed .
Objective The objective of this systematic review was to estimate the effect of physical activity monitor-based interventions on physical activity behavior  in participants aged 65 and above .
Subsequently we explored the effect on body mass index , physical capacity , and health-related quality of life and finally the impact of patient- and intervention characteristics .