Conclusion
guilt
This study highlights important implications for optimising physical activity apps for young women. Noteworthily, young women’s lived experiences of commonly used behaviour change techniques suggest they are promising for influencing important determinants of behaviour change, such as motivation and competence. However, there are issues that need to be addressed, such as the operationalisation of techniques being triggering (in the context of body image), inducing guilt, or leading to privacy or safety violations. Future research focused on overcoming these limitations is recommended.