Using the Theory of Planned Behaviour to predict exercise intention in obese adults (original) (raw)
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Exercise and Healthy Eating Intentions and Behaviors among Normal Weight and Overweight/Obese Adults
Psychology, 2016
Strong evidence suggests that exercise and eating behaviours are strongly linked. Theory of Planned Behaviour is a theoretical framework that has been successfully used to explain and predict both behaviours. The aim of the present study is to explore the constructs of Theory of Planned Behavior (TPB) that better predicts exercise and healthy eating: a) intentions and b) selfreported behaviors among normal weight and overweight/obese adults. Participants were 361 adults in Greece (women: N = 152). According to their BMI scores, they have been grouped into normal weight and overweight/obese. Data were collected with an online questionnaire assessing variables of the theory of planned behavior (TPB) toward exercise and healthy eating intentions and behaviors. Correlations between the variables of TPB and behaviors (healthy eating and exercise) were higher in the normal weight group than in the overweight/obese group. The strongest predictor of intention to exercise was perceived behavioral control for both groups with the overweight/obese group showing higher values in comparison to normal weight group values. The same associations emerged for the prediction of intention for healthy eating behavior. The attitude was also a statistically significant predictor for both groups with higher values in normal weight group. The strongest predictor of exercise behavior was the intention, whereas for eating behavior significant predictors were attitudes, intentions and perceived behavioral control. TPB framework explained both intentions and behaviors for exercise and healthy eating of normal weight and overweight/obese adults. Initial information on which TPB constructs explain better intentions and behaviors by group implied that normal weight group has more positive exercise and healthy eating attitudes and intentions than the overweight/obese group; the behaviors of the overweight/obese group were explained better by perceived behavioral control. The above information can be used to design more effective interventions that aim to produce changes in both behaviors. S. Psouni et al. 599
Objectives: The purpose of this study was analysed differences between attitudes, subjective norms, and PBC between groups of individuals who do physical exercise and those who do not. Method: In order to investigate the different effects of attitudes, subjective norms, PBC on intention in both groups a structural equation modelling was employed. 886 subjects completed a questionnaire measuring the components of TPB model. The first group was formed by 332 people who did not practise and the second group was formed by 554 people who practised physical exercise. Results: Results confirmed differences between two groups of people in the prediction capacity of TPB model. In the first group, all variables explained 65% of the variance in intention. In the second group subjective norm and perceived behavioural control had a significant impact on intention and the three variables explained 67% of its variance. t Conclusions: Findings supported the important role of TPB in the context of p...
An Extended Model of Theory of Planned Behaviour in Predicting Exercise Intention
International Business Research, 2009
The main purpose of the present study was to propose and test an extended model with the addition of perceived need in predicting exercise participation, drawing upon the theory of planned behaviour. Cross-sectional data was collected via self-administered surveys from general adults sample (n = 217). The instrument was first validated using exploratory and confirmatory factor analysis to test for unidimensionality, convergent and discriminant validity. Model and hypotheses testing were performed using structural equation modelling (SEM). The extended model accounted for a substantial portion of the variance in exercise intention (R 2 = 0.798). Specific findings revealed that: (1) all predictors were significantly correlated with exercise intention; (2) attitude components, perceived control, and perceived need predicted exercise intention; (3) instrumental attitude emerged as the strongest predictor of intention. This study has important implications for marketing practitioners, consumer researchers, and public policy makers interested in the determinants of exercise participation.
BMC Women's Health, 2022
Background: Regarding the high rate of obesity and overweight among women, develop a comprehensive and effective program it seems necessary to improve their nutritional behaviors and physical activity. This study aims to survey the effect of educational intervention based on the theory of planned behavior (TPB) on improving physical and nutritional activities of obese and overweight women. Methods: This experimental study was performed on 400 obese and overweight women over the age of 20. The sampling method was A simple random sampling. The data collection was valid and reliable self-reports measure, questionnaires. This tools was including demographic information, questionnaire based on the constructs of the theory of planned behavior, physical activity performance questionnaire and nutritional performance questionnaire that individuals completed before and 6 months after the educational intervention. The training intervention for the experimental group consisted of 12 sessions of 50-55 min. Data analyzed by SPSS22 and by using chi-square test, independent t-test and paired t-test. Results: Findings showed that before the educational intervention, was no significant difference between the experimental and control groups in terms of education, household monthly income, occupation, mean age, marital status, awareness, attitude, perceived behavioral control, subjective norms, physical activity and nutritional behavioral intentions, and physical activity and nutritional performance, weight and BMI. However, six months after the training intervention, there was a significant increase in each of the TPB contracts, weight and BMI in the experimental group, while no significant difference was observed in the control group. The meaningful level was considered 0.05. Conclusion: Our findings partially support of applying theory of planned behavior in reducing the weight, BMI and improved nutritional performance and physical activity of the study subjects. TPB could be an important strategy for effective future educational interventions.
Applying An Extended Version of the Theory of Planned Behaviour to Physical Activity
Journal of sports sciences, 2003
This prospective study explored whether extending the Theory of Planned Behaviour (TPB) with additional variables (descriptive norm, moral norm, anticipated affective reaction, self-identity and past behaviour) would account for additional variance in physical activity intentions and behaviour. Four interactions with past behaviour were also investigated. UK college employees participated in this study (n = 200, Time 1; n = 146, Time 2). Moral norm, self-identity and past behaviour each explained additional variance in intentions, over and above the TPB variables. Past behaviour moderated the impact of descriptive norm on intentions. Intentions, self-identity and past behaviour were significant predictors of behaviour, as measured by a self-report physical activity questionnaire. To increase physical activity, interventions might target moral norm and selfidentity for physical activity. Focusing on positive descriptive norms might benefit sedentary individuals. The significant role of past behaviour is less useful in directing interventions.
Appetite, 2012
Using the Theory of Planned Behaviour (TPB), this study investigates weight control in overweight and obese participants (27 kg/m 2 6 BMI < 45 kg/m 2 ) taking part in a dietary intervention trial targeted at weight loss maintenance (n = 932). Respondents completed TPB measures investigating ''weight gain prevention'' at three time points. Correlation and regression analyses were used to investigate the relationship between TPB variables and weight regain. The TPB explained up to 27% variance in expectation, 14% in intention and 20% in desire scores. No relationship was established between intention, expectation or desire and behaviour at Time 1 or Time 2. Perceived need and subjective norm were found to be significantly related to weight regain, however, the model explained a maximum of 11% of the variation in weight regain. Better understanding of overweight individuals' trajectories of weight control is needed to help inform studies investigating people's weight regain behaviours. Future research using the TPB model to explain weight control should consider the likely behaviours being sought by individuals.
Baltic Journal of Sport and Health Sciences, 2018
Background. The aim of this study is to evaluate the predictive power of affective and cognitive attitudes, perceived behavioural control, subjective norms and past behaviour for intentions to be physically active in a sample of patients with diabetes.Methods. The study included 114 patients with diabetes, 31.2% were men, 62.3% had Type 1 diabetes. Mean age of participants was 44.08 ± 19.31 years. Past physical activity behaviour was measured using physical activity scale from Summary of Diabetes Self-Care Activities (SDSCA) (Cronbach alpha .62) (Toobert, Hamsted, & Glasgow, 2000). Variables within Theory of planet behaviour (intentions, affective and cognitive attitudes, subjective norms and perceived behavioural control) were developed based on the recommendations made by Ajzen (2006). All Theory of planet behaviour questions were scored using a 7-point Likert scale. Cronbach alphas varied from .61 to .96.Results. Perceived behavioural control and subjective norm were significant ...
An Application of the Theory of Planned Behavior to Exercise Among Older Adults1
Journal of Applied Social Psychology, 1998
One hundred five older adults enrolled in exercise classes were recruited from local YMCAs. Exercise behavior was measured 1, 3, and 9 months after beginning the exercise class. Intentions were not a significant predictor of exercise behavior, probably because of a lack of variance; most people intended to exercise. The direct measures of attitudes, subjective norms, and perceived behavioral control, however, explained 9% of exercise behavior at 1 month. They did not significantly explain behavior at 3 and 9 months. When the indirect measure of subjective norms explained 18% of exercise behavior at 1 month. The indirect measure of perceived behavioral control accounted for 27% of the variance at I month and 10% at 3 months.
Psychology & Health, 2005
Although some people may develop an intention to change their health behaviour, they might not take any action. This discrepancy has been labelled the "intention-behaviour gap." Detailed action planning, perceived self-efficacy, and self-regulatory strategies (action control) may mediate between intentions and behaviour. This was examined in a longitudinal sample of 307 cardiac rehabilitation patients who were encouraged to adopt or maintain regular exercise. At the first time point, the predictors of intention and intention itself were assessed. Two months and four months later, the mediators and outcomes were measured. Results confirmed that all the three factors (planning, maintenance self-efficacy, and action control) served to mediate between earlier exercise intentions and later physical activity, each of them making a unique contribution. The results have implications for research on the "intention-behaviour gap," and indicate that planning, maintenance self-efficacy and action control may be important volitional variables.
British Journal of Health Psychology, 2004
Objectives. This study examined the effect of perceived need on exercise and healthy eating using the theory of planned behaviour (TPB). In addition, it investigated the determinants of perceived need. Method. Participants completed a questionnaire measuring components of TPB and perceived need. A follow-up questionnaire 1 week later measured behaviour. The questionnaires were completed by e-mail. The initial questionnaire was completed by 331 adults, and 286 follow-up questionnaires were returned. Results. Perceived behavioural control was the main predictor of exercise intention and affective attitude was the main predictor of healthy eating intention. Perceived need significantly contributed to the prediction of healthy eating intention but not to exercise intention. Intention and perceived behavioural control predicted actual behaviour but perceived need did not. Reasons reported for the perception of needing to engage in both behaviours mainly focused on physical health and weight control. Conclusions. Reasons reported for low perceived need suggest that the concept of perceived need may be rather ambiguous, particularly in the case of exercise. Therefore, further research is needed to elucidate the role of perceived need in relation to a variety of health behaviours.