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 .
Effect of a Pedometer-Based Intervention on Daily Step Counts of Community-Dwelling Older Adults
This study investigated the effect of a 12-week pedometer-based intervention on daily step counts of 147 older adults r and omly assigned to an intervention or wait-list control group ( M age = 72.9 years , SD = 8.8 ) . The intervention group significantly increased their daily step counts after 12 weeks ( M = 639 , SD = 2,239 ) and continued to significantly increase during a 12-week maintenance period ( M = 680 , SD = 1,721 ) . The control group exhibited no change during the control period ( M = -393 , SD = 2,050 ) but had a significant increase in daily step counts ( M = 1,580 , SD = 2,305 ) when enrolled in the intervention . The pedometer-based intervention was effective in increasing participants ' daily step counts
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 .