BackgroundMotivation is a critical factor in supporting sustained exercise, which in turn is associated with important health outcomes. Accordingly, research on exercise motivation from the perspective of self-determination theory (SDT) has grown considerably in recent years. Previous reviews have been mostly narrative and theoretical. Aiming at a more comprehensive review of empirical data, this article examines the empirical literature on the relations between key SDT-based constructs and exercise and physical activity behavioral outcomes.MethodsThis systematic review includes 66 empirical studies published up to June 2011, including experimental, cross-sectional, and prospective studies that have measured exercise causality orientations, autonomy/need support and need satisfaction, exercise motives (or goal contents), and exercise self-regulations and motivation. We also studied SDT-based interventions aimed at increasing exercise behavior. In all studies, actual or self-reported exercise/physical activity, including attendance, was analyzed as the dependent variable. Findings are summarized based on quantitative analysis of the evidence.ResultsThe results show consistent support for a positive relation between more autonomous forms of motivation and exercise, with a trend towards identified regulation predicting initial/short-term adoption more strongly than intrinsic motivation, and intrinsic motivation being more predictive of long-term exercise adherence. The literature is also consistent in that competence satisfaction and more intrinsic motives positively predict exercise participation across a range of samples and settings. Mixed evidence was found concerning the role of other types of motives (e.g., health/fitness and body-related), and also the specific nature and consequences of introjected regulation. The majority of studies have employed descriptive (i.e., non-experimental) designs but similar results are found across cross-sectional, prospective, and experimental designs.ConclusionOverall, the literature provides good evidence for the value of SDT in understanding exercise behavior, demonstrating the importance of autonomous (identified and intrinsic) regulations in fostering physical activity. Nevertheless, there remain some inconsistencies and mixed evidence with regard to the relations between specific SDT constructs and exercise. Particular limitations concerning the different associations explored in the literature are discussed in the context of refining the application of SDT to exercise and physical activity promotion, and integrating these with avenues for future research.

Drawing on self-determination theory, Mullan, Markland, and Ingledew (1997) developed the Behavioural Regulation in Exercise Questionnaire (BREQ) to measure the continuum of behavioral regulation in exercise contexts. The BREQ assesses external, identified, introjected, and intrinsic regulations. Mullan et al. initially included a set of amotivation items but dropped these due to high levels of skewness and a restricted response range in their development sample. It would clearly be useful to assess amotivation for exercise. This study aimed to test the factorial validity of a modified BREQ with amotivation items reinstated in a sample likely to exhibit a wider range of amotivation responses. A total of 194 former exercise referral scheme participants completed the revised instrument (BREQ-2). Although the amotivation items were still skewed, confirmatory factor analysis using the Satorra-Bentler (1994) scaling correction to χ 2 indicated an excellent model fit. The BREQ-2 could prove useful to researchers wishing to assess amotivation in order to develop a more complete understanding of motivation for exercise.Key Words: exercise motivation, measurement, self-determination theory Self-determination theory (SDT: Deci & Ryan, 1985, 1991) is a popular theoretical framework for the investigation of motivation in exercise psychology. One aspect of the theory that has generated particular interest is its multidimensional conceptualization of intrinsic and extrinsic motivation. According to SDT, there are varying forms of motivation that represent qualitatively different ways in which a behavior can be regulated. The theory proposes that these forms of regulation lie along a continuum ranging from completely non-self-determined to completely self-determined regulation. The six different forms of regulation are labeled: amotivation, external regulation, introjection, identification, integration, and intrinsic regulation.Amotivation is a state of lacking any intention to engage in a behavior and is a completely non-self-determined form of regulation. External regulation involves engaging in a behavior only in order to satisfy external pressures or to achieve externally imposed rewards. Introjected regulation involves the internalization of external controls, which are then applied through self-imposed pressures in order to

Motivational interviewing has become widely adopted as a counseling style for promoting behavior change; however, as yet it lacks a coherent theoretical framework for understanding its processes and efficacy. This article proposes that self-determination theory (SDT) can offer such a framework. The principles of motivational interviewing and SDT are outlined and the parallels between them are drawn out. We show how both motivational interviewing and SDT are based on the assumption that humans have an innate tendency for personal growth toward psychological integration, and that motivational interviewing provides the social-environmental facilitating factors suggested by SDT to promote this tendency. We propose that adopting an SDT perspective could help in furthering our understanding of the psychological processes involved in motivational interviewing.Motivational interviewing has become widely adopted as a counseling style for facilitating behavior change. Having evolved originally from clinical experience in the treatment of problem drinking, motivational interviewing was first described by Miller (1983). Its principles and clinical procedures were expanded upon by Rollnick (1991, 2002). Motivational interviewing and adaptations of motivational interviewing

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The purpose of this research was to amend the Vividness of Movement Imagery Questionnaire (VMIQ; Isaac, Marks, & Russell, 1986) in line with contemporary imagery modality and perspective conceptualizations, and to test the validity of the amended questionnaire (i.e., the VMIQ-2). Study 1 had 351 athletes complete the 3-factor (internal visual imagery, external visual imagery, and kinesthetic imagery) 24-item VMIQ-2. Following single-factor confirmatory factor analyses and item deletion, a 12-item version was subject to correlated traits / correlated uniqueness (CTCU) analysis. An acceptable fit was revealed. Study 2 used a different sample of 355 athletes. The CTCU analysis confirmed the factorial validity of the 12-item VMIQ-2. In Study 3, the concurrent and construct validity of the VMIQ-2 was supported. Taken together, the results of the 3 studies provide preliminary support for the revised VMIQ-2 as a psychometrically valid questionnaire.

Objectives. The aim of this study was to further develop and refine the Exercise Motivations Inventory (EMI), a measure of individuals' reasons for exercising.Design. Confirmatory factor analytic procedures using LISREL were employed to test the hypothesized 14-factor structure of the revised instrument (the EMI-2) and the invariance of the factor structure across gender.Methods. Four hundred and twenty-five civil servants completed the revised instrument. Analyses were conducted in three phases. Phase 1 involved detailed examination of the fit of the 14-factors separately in order to detect and eliminate poor indicators. In Phase 2 each factor was paired with every other factor in order to detect and eliminate ambiguous items. In Phase 3 factors were grouped with conceptually related factors into five submodels and the fit and factorial invariance across gender of these submodels was tested.Results. Item elimination at Phases 1 and 2 led to the development of a set of internally consistent factors with strong indicators and good discriminant validity. Phase 3 gave further evidence for the convergent and discriminant validity of the items and factors and strong support for the invariance of the factor structure across gender.Conclusions. The EMI-2 is a factorially valid means of assessing a broad range of exercise participation motives in adult males and females, applicable to both exercisers and non-exercisers.

The aim was to better understand the role of motives in exercise participation. It was hypothesised that motives influence exercise participation by influencing behavioural regulation, and that motives are themselves influenced by personality traits. Data were from a cross-sectional questionnaire survey of 252 office workers, mean age 40 years. Analysis was by structural equation modelling. According to the final model, appearance/weight motive increased external regulation, thereby reducing participation, and also increased introjected regulation. Health/fitness motive increased identified regulation, thereby increasing participation. Social engagement motive increased intrinsic regulation. Neuroticism increased appearance/weight motive, openness increased health/fitness motive, and conscientiousness, without affecting motives, reduced external and introjected regulation. It is inferred that exercise promotion programmes, without denigrating appearance/weight motive, should encourage other motives more conducive to autonomous motivation.

This article explores the topics of motivation and self-regulation in the context of weight management and related behaviors. We focus on the role of a qualitative approach to address motivation - not only considering the level but also type of motivation - in weight control and related behaviors. We critically discuss the operationalization of motivation in current weight control programs, present a complementary approach to understanding motivation based on self-determination theory, and review empirical findings from weight control studies that have used self-determination theory measures and assessed their association with weight outcomes. Weight loss studies which used Motivational Interviewing (MI) are also reviewed, considering MI's focus on enhancing internal motivation. We hypothesize that current weight control interventions may have been less successful with weight maintenance in part due to their relative disregard of qualitative dimensions of motivation, such as level of perceived autonomy, often resulting in a motivational disconnect between weight loss and weight-related behaviors. We suggest that if individuals fully endorse weight loss-related behavioral goals and feel not just competent but also autonomous about reaching them, as suggested by self-determination theory, their efforts are more likely to result in long-lasting behavior change.