Behaviour changes techniques that constitute effective planning interventions to improve physical activity and diet behaviour for people with chronic conditions: a systematic review

Objectives: Action planning is a brief and effective behaviour change technique (BCT) to improve physical activity (PA) and diet behaviour (DB). This study aimed to identify critical BCTs and mechanisms of action (MoA) to interpret the effectiveness of planning interventions based on the health action process approach (HAPA) model.
Design: Systematic review
Data Sources: PubMed, Web of Science, CIHNAL (EBSCO), PsycInfo (EBSCO), Psychology and Behavioural Sciences Collection (EBSCO), psyARTICLES, and Medline were searched for studies from January 1990 to September 2021 published in English.
Eligibility Criteria: Experiment involving action planning intervention to improve PA or DB in community-dwelling adult patients with chronic conditions.
Data extraction and synthesis: Two reviewers independently coded the planning interventions into BCT combinations and MoA assemblies. Outcome was dichotomized according to the statistical power and Cohen's d. The Cochrane risk of bias assessment tool...