Skip to main content

GLP-1 weight loss medications and physical activity behaviours

We are seeking applicants for a self-funded interdisciplinary PhD exploring how Glucagon-like peptide 1 (GLP-1) medications influence physical activity and exercise behaviours.

Since their approval for weight management in the UK in 2023, the use of GLP-1 medications has increased rapidly. While these medications are highly effective in supporting weight loss, far less is known about how they shape physical activity engagement. Physiological effects (e.g., fatigue, gastrointestinal symptoms, hypotension), psychological processes (e.g., motivation, body image), and sociological factors (e.g., weight stigma, identity) are likely to interact in complex ways to influence participation in physical activity, sport and exercise.

Physical activity is essential for improving both physical (Miller et al., 2015) and mental health (Rebar et al., 2015) and guidelines recommend that physical activity should be used in conjunction with weight loss medicines to support long-term behaviour change (NICE, 2025). However, there is currently limited empirical evidence to guide how best to support individuals using GLP-1 medications to engage in appropriate and sustainable physical activity.

Project focus

This PhD may adopt qualitative, quantitative or mixed-method approaches, and encourages the adoption of an interdisciplinary perspective (e.g. psychological and/or sociological and/or physiological).

The specific focus of the PhD will be determined by the applicant, but may:

  • Adopt an interdisciplinary approach to understanding how GLP-1 medications impact physical activity behaviours, patterns and experiences. 
  • Investigate physical activity barriers and facilitators among GLP-1 users. 
  • Explore how physiological effects (e.g., fatigue, gastrointestinal symptoms, hypotension), psychological processes (e.g., motivation, body image), and sociological factors (e.g., weight stigma, identity) influence engagement in GLP-1 users.
  • Contribute to the development of physical activity guidance or intervention strategies for GLP-1 users. 

Applicant profile 

Applicants should have:

  • A background in sport and exercise sciences, public health, sociology, psychology, physiology, or a related field. 
  • Strong methodological skills (qualitative, quantitative or mixed methods)

How to apply

If you are interested in applying for the above PhD topic please follow the steps below:

  1. Contact the supervisor by email or phone to discuss your interest and find out if you would be suitable. Supervisor details can be found on this topic page. The supervisor will guide you in developing the topic-specific research proposal, which will form part of your application.
  2. Click on the "Apply here" button on this page and you will be taken to the relevant PhD course page, where you can apply using an online application.
  3. Complete the online application indicating your selected supervisor and include the research proposal for the topic you have selected.

Good luck!

This is a self-funded topic

Brunel offers a number of funding options to research students that help cover the cost of their tuition fees, contribute to living expenses or both. The UK Government is also offering Doctoral Student Loans for eligible students, and there is some funding available through the Research Councils. Many of our international students benefit from funding provided by their governments or employers. Brunel alumni enjoy tuition fee discounts of 15%.

Meet the Supervisor

Charlotte Kerner

Dr Charlotte Kerner is a Senior Lecturer in Sport, Health and Exercise Sciences. Her research focuses on exploring relationships between body image, physical activity motivation and technology (e.g., social media, wearable technology etc.) in a range of populations, but with a focus on young people. Dr Kerner is specifically interested in how learning environments and technology can facilitate physical activity motivation and support the development of a positive body image. Her work focuses on adopting mixed-method approaches and applying social psychological theory to explore these issues.