PURPOSE: To evaluate the effect of behavioural interventions on levels of physical activity after hip or knee joint replacement. MATERIALS AND METHODS: A systematic review with meta-analysis of randomised controlled trials to determine the effectiveness of behavioural interventions to increase physical activity levels after hip or knee joint replacement. Six databases were searched. Standardised mean differences (SMD) were calculated. The GRADE approach was used to evaluate the level of evidence of each meta-analysis. RESULTS: From a yield of five trials, physical activity was quantified as active minutes per day, daily energy expenditure and daily steps. There was low to moderate-quality evidence from three meta-analyses with observed positive effects that could not conclude whether behavioural interventions increased physical activity in active minutes per day (SMD 0.18, 95% CI -0.14 to 0.51), daily energy expenditure (SMD 0.31, 95% CI -0.24 to 0.87) or daily steps (MD 844.7, 95% CI -178.6 to 1,868.0). CONCLUSIONS: The effectiveness of behavioural interventions to address the low levels of physical activity levels observed after hip or knee joint replacement remains uncertain.

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