Summary: | Physical inactivity, unhealthy diets or tobacco use increase risk of disease. Many people engage in two or more such unhealthy behaviours. Cognitive therapies may increase physical activity, but we do not know the effects of targeting two or more health behaviours at the same time. We evaluated the effect of cognitive therapies targeting two or more lifestyle habits. The included studies involved different patient groups and sedentary and/or overweight persons. We included 14 randomised controlled trials, however few studies followed up the participants beyond four months. We found that: 1. Cognitive therapies, targeting two or more health behaviours at the same time, probably lead to small improvements in physical activity and dietary habits, compared to no intervention or usual care, based on moderate-quality evidence. 2. We are uncertain whether cognitive therapies, when targeting two or more health behaviours at the same time, change physical activity, diet, or tobacco use compared to other interventions
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