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 .
A Primary Care Nurse-Delivered Walking Intervention in Older Adults: PACE (Pedometer Accelerometer Consultation Evaluation)-Lift Cluster Randomised Controlled Trial
Background Brisk walking in older people can increase step-counts and moderate to vigorous intensity physical activity ( MVPA ) in ≥10-minute bouts , as advised in World Health Organization guidelines . Previous interventions have reported step-count increases , but not change in objective ly measured MVPA in older people . We assessed whether a primary care nurse-delivered complex intervention increased objective ly measured step-counts and MVPA . Methods and Findings A total of 988 60–75 year olds , able to increase walking and r and omly selected from three UK family practice s , were invited to participate in a parallel two-arm cluster r and omised trial ; r and omisation was by household . Two-hundred-ninety-eight people from 250 households were r and omised between 2011 and 2012 ; 150 individuals to the intervention group , 148 to the usual care control group .  Intervention participants received four primary care nurse physical activity ( PA ) consultations over 3 months , incorporating behaviour change techniques , pedometer step-count and accelerometer PA intensity feedback , and an individual PA diary and plan . Assessors were not blinded to group status , but statistical analyses were conducted blind . The primary outcome was change in accelerometry assessed average daily step-counts between baseline and 3 months , with change at 12 months a secondary outcome . Other secondary outcomes were change from baseline in time in MVPA weekly in ≥10-minute bouts , accelerometer counts , and counts/minute at 3 months and 12 months . Other outcomes were adverse events , anthropometric measures , mood , and pain . Qualitative evaluations of intervention participants and practice nurses assessed the intervention ’s acceptability . At 3 months , eight participants had withdrawn or were lost to follow-up , 280 ( 94 % ) individuals provided primary outcome data . At 3 months changes in both average daily step-counts and weekly MVPA in ≥10-minute bouts were significantly higher in the intervention than control group : by 1,037 ( 95 % CI 513–1,560 ) steps/day and 63 ( 95 % CI 40–87 ) minutes/week , respectively . At 12 months corresponding differences were 609 ( 95 % CI 104–1,115 ) steps/day and 40 ( 95 % CI 17–63 ) minutes/week . Counts and counts/minute showed similar effects to steps and MVPA . Adverse events , anthropometry , mood , and pain were similar in the two groups . Participants and practice nurses found the intervention acceptable and enjoyable . Conclusions The PACE-Lift trial increased both step-counts and objective ly measured  MVPA  in ≥10-minute bouts in 60–75 year olds at 3 and 12 months , with no effect on adverse events . To our knowledge , this is the first trial in this age group to demonstrate objective MVPA increases and highlights the value of individualised support incorporating objective PA assessment in a primary care setting . Trial Registration Controlled-Trials.com IS RCT
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 .