Emotional disclosure in palliative care: A scoping review of intervention characteristics and implementation factors.

BACKGROUND: Emotional disclosure is the therapeutic expression of emotion. It holds potential as a means of providing psychological support. However, evidence of its efficacy in palliative settings is mixed. This may be due to variation in intervention characteristics. AIM: To derive a greater understanding of the characteristics of potentially effective emotional disclosure-based interventions in palliative care by:(1) Developing a taxonomy of emotional disclosure-based interventions tested in people with advanced disease and(2) Mapping and linking objectives, outcomes, underlying mechanisms, and implementation factors. DESIGN: A scoping review drawing on Intervention Component Analysis to combine evidence from studies' methods, results, and discussion sections. DATA SOURCES: Six databases were searched to May 2020 including CINAHL, PsycINFO, and MEDLINE. Studies of emotional disclosure in adults with advanced disease were included. Study quality was appraised using an established tool. RESULTS: Seven thousand seven hundred ninety-two unique records were screened, of which 25 primary studies were included. Intervention characteristics were grouped into classes within three domains: topic of disclosure, format, and dose. Evidence was not available to determine which, if any, of the characteristics is most effective. Thematic synthesis of evidence from methods and discussion sections identified factors to consider in tailoring an emotional disclosure-based intervention to this setting, including: population characteristics (e.g. time since diagnosis), providing a safe environment, and flexibility in format. CONCLUSIONS: This review approach facilitated a clearer understanding of factors that may be key in developing emotional disclosure-based interventions for palliative populations. Intervention Component Analysis has potential for application elsewhere to help develop evidence-based interventions.

The effect of current and anticipated body pride and shame on dietary restraint and caloric intake.

Studies have established a link between body shame and eating disorder symptoms and behaviours. However, few have differentiated current feelings of body shame from those anticipated with weight change and none has examined the effects of these on subsequent eating behaviour. In this paper, a measure of body pride and shame was developed (Study 1) for the purposes of using it in a subsequent longitudinal study (Study 2). Two hundred and forty two women were recruited from a university and the general population and participated in Study 1, completing the Body Pride and Shame (BPS) scale either online or offline, as well as a number of validating measures. In Study 2, 40 female students completed the BPS, as well as a measure of dietary restraint, and subsequently recorded their dietary intake everyday for the next seven days. Study 1 identified and validated subscales of current body pride/shame as well as pride/shame that is anticipated were the individual to gain weight or lose weight. In Study 2, over and above levels of dietary restraint, current feelings of body shame predicted eating more calories over the next 7 days while the anticipation of shame with weight gain predicted eating fewer calories. Although previous research has only measured current feelings of body shame, the present studies showed that anticipated shame also impacts on subsequent behaviour. Interventions that regulate anticipated as well as current emotions, and that do not merely challenge cognitions, may be important in changing eating behaviour.

Social Rank, Rank-Related Life Events and Eating Pathology.

BACKGROUND: This study explored the role of meaning in the link between stress and disordered eating, in particular focusing on social rank. METHOD: Two hundred and eleven women completed measures of eating pathology, depression, social comparison and life events where life events were assessed in terms of general loss, threat, shame and loss of social status. RESULTS: Events involving loss of social status were related to eating pathology but only in women reporting self-perceived low rank. Events that did not concern social status were unrelated to eating pathology. DISCUSSION: Women who perceive themselves to be low social status appear vulnerable to events that concern their social status.

Social rank and symptom change in eating disorders: a 6-month longitudinal study.

BACKGROUND: Following previous cross-sectional research adopting an evolutionary approach to social rank and eating disorders, the present study explored the predictive value of social rank for changes in eating disorder symptoms in a 6-month longitudinal study. METHODS: Seventy-three women and men with a history of eating disorders were followed up over 6 months. A broad range of measures of social rank were used to determine whether social rank at baseline predicted residual changes in eating disorder symptoms. RESULTS: Low social rank (in terms of perceived external entrapment and submissive behaviour) predicted an increase in symptoms of anorexia but not symptoms of bulimia. The predictive value of low social rank was not mediated by changes in depressive symptoms. CONCLUSION: Perceived low rank predicts an increase in anorexic symptoms. However, further research is required to determine the precise nature of how social rank exerts its influence on the development of eating disorder symptoms. KEY PRACTITIONER MESSAGE: Self-perceived low social rank predicts an increase in anorexic symptoms but not bulimic symptoms. The effect of low social rank on changes in anorexic symptoms was not mediated by changes in depressive symptoms. Interventions for anorexia nervosa may need to incorporate techniques for increasing status and/or self-compassion.

Social defeat and PTSD symptoms following trauma.

OBJECTIVES: Research indicates that constructs relevant to social rank predict a diagnosis of post-traumatic stress disorder (PTSD), including mental defeat, alienation, and shame. However, no studies have yet explored a social rank view explicitly. DESIGN: This was a community-based study carried out online. Analyses were both cross-sectional and longitudinal over 6 months. METHODS: Participants were recruited online for a cross-sectional study (Study 1, n = 194) and a 6-month longitudinal study (Study 2, n = 81). Measures included self-report measures of PTSD symptoms (the Post-Traumatic Diagnostic Scale) and social rank (including measures of unfavourable social comparison, social defeat, and internal/external entrapment). RESULTS: Cross-sectional analysis showed that social defeat, but not other aspects of social rank, was independently predictive of a diagnosis of PTSD. Longitudinal analysis showed that greater social defeat at baseline predicted less improvement in PTSD symptoms, whereas greater reduction in social defeat over the 6-month follow-up predicted greater improvement in PTSD symptoms. CONCLUSIONS: In addition to the implications for understanding the role of social (rather than individual mental) defeat in the aetiology of PTSD, interventions could usefully incorporate methods that either increase social status or else minimize the impact of low status (e.g., through the use of compassion-focused approaches).

A confirmatory factor analysis and validation of the forms of self-criticism/reassurance scale.

OBJECTIVE: Several studies have used the Forms of Self-Criticism/Reassurance Scale (FSCRS; Gilbert, Clarke, Hempel, Miles, & Irons, 2004) when exploring the role of emotion regulation in psychopathology. However, psychometric evaluation of the FSCRS is limited. The present study sought to confirm the factor structure of the FSCRS based on theoretical and empirical grounds in a large sample of the general population. METHOD: The FSCRS was completed by a large sample of men and women (N= 1,570) as part of an online survey. The data were randomly split in order to perform both independent exploratory (EFA) and confirmatory factor analyses (CFA). One-, two- and three-factor solutions were examined. RESULTS: A three-factor model of reassured-self (RS) and the two types of self-criticism, inadequate-self (IS), and hated-self (HS), proved to be the best-fitting measurement model in this sample (χ(2) = 800.3, df= 148, p < .001; CFI [comparative fit index]= .966, TLI [Tucker Lewis index]= .961, RMSEA [root mean square error of the approximation]= .074). Although very similar to the original questionnaire, there were some differences in terms of the items that were retained. Validity was confirmed with the shortened FSCRS showing the same associations with mood and sex as the original version of the FSCRS. CONCLUSION: A three-factor model (RS, IS and HS) provided the best-fitting structure and confirmed the separation of different types of self-criticism. Future research should explore the degree to which these separable aspects of self-criticism are theoretically and clinically meaningful and to identify the role of self-reassurance in ameliorating their effects.

General shame and bodily shame in eating disorders: a 2.5-year longitudinal study.

OBJECTIVE: Studies have established a link between shame and eating disorder symptoms but have generally been cross-sectional or failed to differentiate between general shame and bodily shame. The present study addressed both these issues. DESIGN: This study used a longitudinal panel design. METHOD: Fifty-five women with a past or current eating disorder participated. They completed measures of eating pathology, depression, general shame (internal and external) and bodily shame (current feelings of bodily shame as well as bodily shame that is anticipated were the individual to gain weight) and were followed up over 2.5 years. RESULTS: Bodily shame uniquely predicted an increase in anorexic (but not bulimic) symptoms. Current bodily shame predicted an increase in the degree of underweight and the misperception of body size. Anticipated bodily shame predicted an increase in fear of weight gain. DISCUSSION: Current versus anticipated bodily shame predicts different anorexic symptoms. Both therefore should be considered in developing interventions and aetiological models of anorexia nervosa.

A pilot study on the effects and feasibility of compassion-focused expressive writing in Day Hospice patients.

OBJECTIVE: Research has found that writing about stress can confer physical and psychological health benefits on participants and that adopting a self-compassionate stance may have additional benefits. This pilot study evaluated a self-compassionate expressive writing intervention in a Day Hospice setting. METHOD: Thirteen patients with life-limiting illnesses wrote on two occasions about recent stressful experiences. Half also received a self-compassion instruction for their writing. Outcome measures were taken at baseline and one week after the second writing session, and text analysis was used to identify changes in the types of words used, reflecting changes in psychological processes. RESULTS: Patients given the self-compassion instruction increased in their self-soothing and self-esteem in contrast to patients in the stress-only condition. Happiness broadly increased in both groups although reported levels of stress generally increased in patients given the self-compassion instruction but decreased in patients in the stress-only condition. Those given the self-compassion instruction also increased in their use of causal reasoning words across the two writing sessions compared with those in the stress-only condition. SIGNIFICANCE OF RESULTS: Expressive writing appears to be beneficial in patients at a hospice and was viewed as valuable by participants. The inclusion of a self-compassion instruction may have additional benefits and a discussion of the feasibility of implementing expressive writing sessions in a Day Hospice is offered.

Determinants of weekly sitting time: construct validation of an initial COM-B model and comparison of its predictive validity with the Theory of Planned Behaviour.

OBJECTIVE: In relation to sitting behaviour, to investigate which theoretical domains best formed the Capability, Opportunity, and Motivation constructs of the COM-B, and compare the predictive validity to the Theory of Planned Behaviour (TPB), taking habit strength into consideration. DESIGN: Using a prospective design, 186 adults completed measures capturing domains from the Theoretical Domains Framework for the three COM-B constructs, and habit strength, which were examined using a formative measurement model. Predictive validity was then compared to the TPB. MAIN OUTCOME MEASURES: Self-reported sitting behaviour. RESULTS: Self-monitoring (behavioural regulation domain) formed Capability; subjective norm (social influences domain) formed Opportunity; intention (intentions domain), positive affect (emotion domain), and perceived behavioural control (beliefs about capabilities domain), formed Motivation. The COM-B strongly predicted sitting behaviour (27% variance explained), with Capability, Opportunity, and habit strength as key drivers. The TPB explained a large amount of variance (23%) in sitting behaviour, with intention and habit strength as key drivers. CONCLUSIONS: The behavioural regulation domain of Capability, the social influences domain of Opportunity, and habit strength were important drivers of sitting behaviour, with comparable variance predicted in the COM-B and TPB. Future research should consider this approach to conceptualise the COM-B for specific populations and behaviours.

Development and validation of the Body Compassion Questionnaire.

BACKGROUND: The associations between compassion, self-compassion, and body image are well established. However, there is not yet a compassion-informed measure of body compassion that can be applied to any aspect of one's body. METHOD: Items for The Body Compassion Questionnaire (BCQ) were derived from an earlier expressive writing study on self-compassion in body image. In study 1, the BCQ was completed by 728 men and women; with factor analysis, Rasch analysis, content and concurrent validation and reliability assessed. Study 2 compared BCQ scores with investigator-based ratings of spontaneous expressions of body compassion through writing in female undergraduates as well as an existing measure of body compassion. Study 3 examined the associations between BCQ scores, and the emotions expressed in a structured body image writing task. It also examined the relative predictive ability of the BCQ versus self-compassion in predicting eating pathology. RESULTS: A bi-factor structure was identified, with an overall BCQ score and three subscales: body kindness, common humanity, and motivated action. The BCQ and its subscales had good validity and reliability and Rasch analysis showed the item fit was invariant across a range of demographic characteristics. Spontaneous expressions of body compassion showed positive associations with body kindness. Overall BCQ scores and body kindness were also inversely related to negative emotions expressed in relation to body image. The BCQ was a better predictor of eating disorder symptoms than was self-compassion. CONCLUSIONS: The BCQ is the first measure of body compassion that is aligned with theoretical aspects of self-compassion, and which includes aspects of both the first and second psychologies of compassion. It also highlights its potential use as a process measure of body compassion in models of eating disorder symptomology, mood and wellbeing as well as an outcome measure for compassion-based interventions in eating disorders and body image.

A randomized controlled two-stage trial in the treatment of bulimia nervosa, comparing CBT versus motivational enhancement in Phase 1 followed by group versus individual CBT in Phase 2.

OBJECTIVE: To conduct a randomized, controlled, two-stage trial in the treatment of bulimia nervosa, comparing cognitive-behavioral therapy (CBT) versus motivational enhancement in Phase 1 followed by group versus individual CBT in Phase 2. METHODS: A total of 225 patients with bulimia nervosa or eating disorder not otherwise specified (EDNOS) were recruited into a randomized controlled trial lasting 12 weeks with follow-ups at 1 year and 2.5 years. RESULTS: Patients improved significantly across all of the interventions with no differences in outcome or treatment adherence. Including motivational enhancement therapy rather than a CBT first phase of treatment did not affect outcome. CONCLUSIONS: Outcome differences between individual and group CBT were minor, suggesting that group treatment prefaced by a short individual intervention may be a cost-effective alternative to purely individual treatment.

Are physical activity interventions for healthy inactive adults effective in promoting behavior change and maintenance, and which behavior change techniques are effective? A systematic review and meta-analysis.

Physical inactivity and sedentary behavior relate to poor health outcomes independently. Healthy inactive adults are a key target population for prevention. This systematic review and meta-analysis aimed to evaluate the effectiveness of physical activity and/or sedentary behavior interventions, measured postintervention (behavior change) and at follow-up (behavior change maintenance), to identify behavior change techniques (BCT) within, and report on fidelity. Included studies were randomized controlled trials, targeting healthy inactive adults, aiming to change physical activity and/or sedentary behavior, with a minimum postintervention follow-up of 6 months, using 16 databases from 1990. Two reviewers independently coded risk of bias, the "Template for Intervention Description and Replication" (TIDieR) checklist, and BCTs. Twenty-six studies were included; 16 pooled for meta-analysis. Physical activity interventions were effective at changing behavior (d = 0.32, 95% confidence intervals = 0.16-0.48, n = 2,346) and maintaining behavior change after 6 months or more (d = 0.21, 95% confidence intervals = 0.12-0.30, n = 2,190). Sedentary behavior interventions (n = 2) were not effective. At postintervention, physical activity intervention effectiveness was associated with the BCTs "Biofeedback," "Demonstration of the behavior," "Behavior practice/rehearsal," and "Graded tasks." At follow-up, effectiveness was associated with using "Action planning," "Instruction on how to perform the behavior," "Prompts/cues," "Behavior practice/rehearsal," "Graded tasks," and "Self-reward." Fidelity was only documented in one study. Good evidence was found for behavior change maintenance effects in healthy inactive adults, and underlying BCTs. This review provides translational evidence to improve research, intervention design, and service delivery in physical activity interventions, while highlighting the lack of fidelity measurement.

A prospective study exploring the construct and predictive validity of the COM-B model for physical activity.

This study examined the constructs of capability, opportunity and motivation from the COM-B model and their influence on moderate-to-vigorous physical activity. Using a prospective survey design, 186 healthy adults completed measures representing the theoretical domains framework mapped to the COM-B, and moderate-to-vigorous physical activity 1 week later. The main indicators for the COM constructs were 'habits' (Capability), 'subjective norms' (Opportunity) and 'exercise self-identity' (Motivation). Motivation (77%) and moderate-to-vigorous physical activity (50%) were strongly predicted, with Capability and Motivation as key drivers of behaviour. Motivation was a strong mediator for Capability on behaviour. Future research should consider this approach for other populations and behaviours.

Eating Disorder Examination Questionnaire (EDE-Q): Norms and psychometric properties in U.K. females and males.

The Eating Disorder Examination Questionnaire (EDE-Q) is a widely used assessment of eating disorder psychopathology; however, EDE-Q norms are yet to be provided within a nonclinical U.K. adult sample. Second, there is considerable disagreement regarding the psychometric properties of this measure. Several alternative factor structures have been previously proposed, but very few have subsequently validated their new structure in independent samples and many are often confined to specific subpopulations. Therefore, in the current study, we provide norms of the original four-factor EDE-Q structure, and subsequently assess the psychometric properties of the EDE-Q in females and males using a large nonclinical U.K. sample (total N = 2459). EDE-Q norms were consistently higher in females compared with males across all samples. Initial confirmatory factor analyses (CFA) did not support the original 4-factor structure for females or males (Phase 1). However, subsequent exploratory factor analyses (EFA) revealed a 3-factor structure as being the optimal fit for both females and males, using an 18-item and 16-item model, respectively (Phase 2). For females, the newly proposed 18-item structure was validated within an independent student sample and further validated in an additional nonstudent sample. The 16-item 3-factor male structure was also validated within an independent nonstudent sample, but was marginally below accepted fit indices within an independent student sample (Phase 3). Taken together, the above findings suggest that the EDE-Q factor structure may require further reassessment, with greater focus on the qualitative differences in interpretation of EDE-Q items between females and males. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

Web-based indicated prevention of common mental disorders in university students in four European countries - Study protocol for a randomised controlled trial.

BACKGROUND: Mental disorders and their symptoms are highly prevalent in the university student population, and the transition from secondary to tertiary education is associated with a rise in mental health problems. Existing web-based interventions for the prevention of common mental disorders in student populations often focus on just one disorder and have not been designed specifically for students. There is thus a need for transdiagnostic, student-specific preventative interventions that can be widely disseminated. This two-arm, parallel group randomised controlled trial aims to evaluate the effectiveness and cost-effectiveness of a web-based transdiagnostic mental health problem prevention programme (PLUS) across several universities in four countries. METHOD: Students (N = 5550) will be recruited through a variety of channels and asked to complete a personality assessment to determine whether they are at high risk for developing common mental disorders. Students at high risk will be randomly allocated to either PLUS or a control intervention, which provides practical support around issues commonly experienced at university. Students at low risk will be allocated to the control intervention. Both intervention groups will be assessed at baseline, 4 weeks, 3 months, 6 months and 12 months after randomisation. Depression and generalised anxiety, assessed using the Patient Health Questionnaire and the Generalised Anxiety Disorder scales, will form the primary outcomes in this study. Secondary outcome measures include alcohol and drug use, eating behaviour, self-esteem, and quality of life. The cost-effectiveness of the intervention will also be evaluated. CONCLUSIONS: This study will contribute to understanding the role of transdiagnostic indicated web-based interventions for the prevention of common mental disorders in university students. It will also be one of the first studies to investigate the cost-effectiveness of such interventions. TRIAL REGISTRATION: This trial was registered in the ISRCTN register (ISRCTN15570935) on 12th February 2016.

Shame in women with a history of eating disorders.

OBJECTIVE: Several studies have investigated shame in eating disorders but most have used non-clinical samples examined only one type of eating disorder or included only a limited range of shame measures. The current study explored shame from multiple perspectives in women who report a range of eating disorder diagnoses and who are at different stages of illness and recovery. METHOD: In a postal questionnaire study, 224 women with a history of an eating disorder completed measures of anorexic and bulimic symptoms, depression and shame. RESULTS: After controlling for levels of depression, shame was associated with eating disorder symptoms. Specifically, shame as a measure of 'perceived involuntary subordination' (external shame) was uniquely associated with severity of anorexia nervosa symptoms, while shame as a measure of 'feelings' (internal shame) was uniquely associated with severity of bulimia nervosa symptoms. DISCUSSION: Different types of shame are related to different eating disorder symptoms and this may have implications for the aetiology and presentation of these disorders. These affective states may need to be addressed explicitly in therapy.

The specificity of social rank in eating disorder versus depressive symptoms.

It has been proposed that an evolutionary approach to understanding rank and social status may contribute to our understanding of eating disorder symptoms. The present study sought to explore the degree to which rank might be related to eating pathology independently of its known association with depression. A non-clinical sample of 74 women completed rank-relevant measures of social defeat, entrapment, submissive behavior and social comparison as well as measures of depressive and eating disorder symptoms. Independently of depressive symptoms, submissive behavior and an unfavorable social comparison predicted eating pathology while social defeat and internal entrapment predicted depressive symptoms. There appears to be a specific role for social rank in relation to eating pathology. However, further research is required to determine precisely what this role is and the degree to which it relates to risk or recovery.

The Factor Structure of the Forms of Self-Criticising/Attacking & Self-Reassuring Scale in Thirteen Distinct Populations.

There is considerable evidence that self-criticism plays a major role in the vulnerability to and recovery from psychopathology. Methods to measure this process, and its change over time, are therefore important for research in psychopathology and well-being. This study examined the factor structure of a widely used measure, the Forms of Self-Criticising/Attacking & Self-Reassuring Scale in thirteen nonclinical samples (N = 7510) from twelve different countries: Australia (N = 319), Canada (N = 383), Switzerland (N = 230), Israel (N = 476), Italy (N = 389), Japan (N = 264), the Netherlands (N = 360), Portugal (N = 764), Slovakia (N = 1326), Taiwan (N = 417), the United Kingdom 1 (N = 1570), the United Kingdom 2 (N = 883), and USA (N = 331). This study used more advanced analyses than prior reports: a bifactor item-response theory model, a two-tier item-response theory model, and a non-parametric item-response theory (Mokken) scale analysis. Although the original three-factor solution for the FSCRS (distinguishing between Inadequate-Self, Hated-Self, and Reassured-Self) had an acceptable fit, two-tier models, with two general factors (Self-criticism and Self-reassurance) demonstrated the best fit across all samples. This study provides preliminary evidence suggesting that this two-factor structure can be used in a range of nonclinical contexts across countries and cultures. Inadequate-Self and Hated-Self might not by distinct factors in nonclinical samples. Future work may benefit from distinguishing between self-correction versus shame-based self-criticism.

Health-Related Quality of Life after Coronary Revascularization: A systematic review with meta-analysis.

OBJECTIVE: To conduct a systematic review and meta-analysis to summarize evidence and determine the impact of coronary revascularization (CR) on cardiac patients' Health-Related Quality of Life (HRQoL), highlighting factors that may affect this outcome in patients. METHODS: A systematic search of Medline (Pubmed), EMBASE, Cochrane Library, Sciverse (Science Direct and Scopus) and PsycInfo was conducted to identify studies published from January 2000 to December 2012. Data were analyzed using MIX 2.0 Pro and SPSS 20. RESULTS: Thirty-four longitudinal studies met the inclusion criteria; these studies included 15,992 patients, of whom 8,027 had undergone PCI, 6,348 had undergone CABG and 1,617 had received medication treatment. Moderate long-term effect sizes were revealed for both CR procedures. Both percutaneous coronary interventions (PCI) and coronary artery bypass graft surgery (CABG) had significantly greater effects on HRQoL than did medication; however, the CR procedures did not differ significantly from each other. Moderators included the type of instrument used to assess HRQoL and the study quality. Benefits related to physical functioning were greater than those related to psychosocial functioning in patients treated with CABG. CONCLUSIONS: Empirical research highlights the positive effect of CR on patient HRQoL. Researchers should carefully select the instrument they use to measure HRQoL, as this may affect the results and thus conclusions. More RCTs and between-group studies employing pre-post designs should be conducted before clear conclusions can be drawn.

What are the most effective behaviour change techniques to promote physical activity and/or reduce sedentary behaviour in inactive adults? A systematic review protocol.

INTRODUCTION: Large proportions of the population are not meeting recommended levels of physical activity and have increasingly sedentary lifestyles. Low levels of physical activity are predictive of poor health outcomes and time spent sedentary is related to a host of risk factors independently of physical activity levels. Building an evidence base of the best approaches to intervene in the lifestyles of inactive individuals is crucial in preventing long-term disease, disability and higher mortality rates. METHODS AND ANALYSIS: Systematic searches will be conducted on all relevant databases (eg, PubMed, Scopus, CINAHL, PsycINFO). Studies will be included if they assess interventions aimed at changing physical activity or sedentary behaviour levels in adults (over 18) who are inactive and do not suffer from chronic conditions. Studies must also be randomised controlled trials (RCTs), have a primary outcome of physical activity or sedentary behaviour, and measure outcomes at least 6 months after intervention completion. Studies will be coded using the Behaviour Change Technique (BCT) taxonomy v1 and Template for Intervention Description and Replication (TIDieR) guidelines. 2 reviewers will independently screen full-text articles and extract data on study characteristics, participants, BCTs, intervention features and outcome measures. Study quality will also be assessed independently by 2 reviewers using the Cochrane risk of bias tool. A meta-analysis will be considered if there is sufficient homogeneity across outcomes. GRADE criteria will be used to assess quality of evidence. DISSEMINATION: This will be the first review to systematically appraise interventions aimed at changing the physical activity or sedentary behaviour of inactive individuals using RCT designs with a 6-month follow-up post-intervention. This review will better inform intervention designers targeting inactive populations and inform the design of a future complex intervention. REVIEW REGISTRATION NUMBER: This protocol was registered with the International Prospective Register of Systematic Reviews (PROSPERO) on 17 October 2014 (registration number: CRD42014014321).