Overview
Background
Dr George Thomas is a Postdoctoral Research Fellow at the University of Queensland’s Health and Wellbeing Centre for Research Innovation and a member of the ARC Centre of Excellence for the Digital Child. His work focuses on understanding children’s engagement with digital technologies and how this shapes their health, wellbeing, and development.
George has over 15 years of experience in public health and behavioural sciences, with expertise spanning:
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Digital health and healthy screen use in childhood
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Health behaviour change and family-based interventions
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Translation of research into community programs
He began his career with a UK government taskforce on weight management, delivering healthy lifestyle programs for school children and families. Since then, his research has focused on bridging science and practice, ensuring evidence informs policy and community action.
George is also committed to education and mentorship. He has taught research methods and public health to undergraduate students in paramedicine and sport and exercise sciences, consistently receiving excellent feedback, and has supervised more than 30 student research projects.
A passionate advocate for promoting healthy behaviours, George works to create practical solutions that support families, schools, and communities.
Availability
- Dr George Thomas is:
- Available for supervision
- Media expert
Fields of research
Qualifications
- Bachelor (Honours) of Exercise and Sports Sciences, University of Gloucestershire
- Masters (Research) of Health Sciences (Public Health), University of Bristol
- Doctor of Philosophy of Behavioural Science, University of Southern Queensland
Research interests
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Physical activity and health
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Measurement of physical activity and sedentary behaviour
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Screen use in children and adolescents
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Pragmatic evaluation of health promotion interventions
Research impacts
George’s research is making a difference in how families, schools, and communities support children’s healthy engagement with digital technologies and physical activity. His work provides evidence that guides policy, informs community programs, and shapes the way health organisations address children’s wellbeing.
Key impacts include:
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High international reach and influence: 25 publications since 2018 have attracted more than 2,500 citations, with one study ranked the highest cited article since 2017 in Psychology of Sport and Exercise. These findings have helped set the agenda for research and practice in youth sport and screen use.
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Evidence translated into practice: Research has informed healthy lifestyle programs for school children and families, contributing to better approaches to weight management, behaviour change, and digital wellbeing.
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Recognition and leadership: Awarded Best Oral Presentation at the International Society for Behavioural Nutrition and Physical Activity (ISBNPA) Congress, highlighting the relevance of his findings to international health and wellbeing communities.
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Capacity building and collaboration: Investigator on grants exceeding $4M, including $300,000 from the ARC Centre of Excellence for the Digital Child, supporting large-scale projects that bring researchers, government, and communities together to create real-world solutions.
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Contributing to quality science: Regular reviewer for leading journals in psychology and public health, ensuring high standards of evidence in the field.
Through this work, George is helping to shape healthier futures for children by ensuring research translates beyond the academic world into practical, lasting impact.
Works
Search Professor George Thomas’s works on UQ eSpace
Featured
2020
Journal Article
A descriptive epidemiology of screen-based devices by children and adolescents: a scoping review of 130 surveillance studies since 2000
Thomas, George, Bennie, Jason A., De Cocker, Katrien, Castro, Oscar and Biddle, Stuart J. H. (2020). A descriptive epidemiology of screen-based devices by children and adolescents: a scoping review of 130 surveillance studies since 2000. Child Indicators Research, 13 (3), 935-950. doi: 10.1007/s12187-019-09663-1
Featured
2019
Journal Article
Physical activity and mental health in children and adolescents: an updated review of reviews and an analysis of causality
Biddle, Stuart J. H., Ciaccioni, Simone, Thomas, George and Vergeer, Ineke (2019). Physical activity and mental health in children and adolescents: an updated review of reviews and an analysis of causality. Psychology of Sport and Exercise, 42, 146-155. doi: 10.1016/j.psychsport.2018.08.011
2025
Journal Article
An analysis of people with disabilities in Australia by age, sex, disability type and severity – Implications for leveraging the 2032 Paralympic games to increase physical activity participation
Tweedy, Sean, Fortnum, Kathryn, Thomas, George, Cole, Damien, Demetriou, Bridget, Dutia, Iain, Hill, Jessica, Cairney, John and Beckman, Emma (2025). An analysis of people with disabilities in Australia by age, sex, disability type and severity – Implications for leveraging the 2032 Paralympic games to increase physical activity participation. JSAMS Plus, 6 100110, 100110. doi: 10.1016/j.jsampl.2025.100110
2025
Journal Article
The role of lifestyle factors in type 2 diabetes in children and adolescents: a systematic review
Fortnum, Kathryn, Thomas, George, Too, Kiara, Tam, Athena, Tilley, Kate, Cairney, John, Healy, Genevieve N. and Gomersall, Sjaan (2025). The role of lifestyle factors in type 2 diabetes in children and adolescents: a systematic review. BMC Public Health, 25 (1) 3675, 1-11. doi: 10.1186/s12889-025-23767-0
2025
Journal Article
Longitudinal associations between maternal and child screen use at 1 year of age and child behavior and development at 3 years of age
Sim, Stephanie, Zabatiero, Juliana, Bear, Natasha, Beynon, Amber, Thomas, George, Srinivasjois, Ravisha, Jongeling, Brad, Silva, Desiree and Straker, Leon (2025). Longitudinal associations between maternal and child screen use at 1 year of age and child behavior and development at 3 years of age. BMC Pediatrics, 25 (1) 791, 1-14. doi: 10.1186/s12887-025-05701-w
2025
Journal Article
Associations between screen time, sleep quality, diet quality and food selectivity among school-aged autistic children
Wang, Hiu Fei Wendy, Smith, Simon S., O’Flaherty, Martin, Trost, Stewart G., Thomas, George, Walker, Jacqueline L., Fortnum, Kathryn, McNaughton, Sarah, Cairney, John and Bourke, Matthew (2025). Associations between screen time, sleep quality, diet quality and food selectivity among school-aged autistic children. Journal of Autism and Developmental Disorders, 1-14. doi: 10.1007/s10803-025-07064-8
2025
Journal Article
Association between 24-h movement behaviors and mental health in children and adolescents: a systematic review and compositional data meta-analysis
Bourke, Matthew, Wang, Hiu Fei Wendy, Fortnum, Kathryn, Thomas, George, O'Flaherty, Martin, Mulcahy, Samantha K., Gomersall, Sjaan R., Alsop, Tahlia, Trost, Stewart G., Bruijns, Brianne A., Phillips, Sophie M., Vanderloo, Leigh, Tucker, Patricia, Hesketh, Kylie D., Kwan, Matthew Y. W. and Cairney, John (2025). Association between 24-h movement behaviors and mental health in children and adolescents: a systematic review and compositional data meta-analysis. Scandinavian Journal of Medicine and Science in Sports, 35 (8) e70120, e70120-8. doi: 10.1111/sms.70120
2025
Journal Article
Correlates of Physical Activity among 4,719 Indonesian Adolescents: The Role of Sociodemographic, Screen Time, and Sports Participation
Andriyani, Fitria Dwi, Hastuti, Tri Ani, Ries, Francis, Sari, Indah Prasetyawati Tri Purnama, Andrianto, Sigit Dwi, Thomas, George and Biddle, Stuart J. H. (2025). Correlates of Physical Activity among 4,719 Indonesian Adolescents: The Role of Sociodemographic, Screen Time, and Sports Participation. International Journal of Human Movement and Sports Sciences, 13 (4), 942-953. doi: 10.13189/saj.2025.130430
2025
Other Outputs
Promoting mental wellbeing and recovery across the lifespan: a review of evidence
Fortnum, Kathryn, Bourke, Matthew, Thomas, George, Mulcahy, Samantha, Alsop, Tahlia and Gomersall, Sjaan (2025). Promoting mental wellbeing and recovery across the lifespan: a review of evidence. doi: 10.31219/osf.io/y7uwj_v1
2025
Journal Article
Development, validation, acceptability and usability of a device-based system to measure sit-stand desk usage
Healy, Genevieve N., Melendez-Calderon, Alejandro, Kaab, Sami, Bongers, Noah, Heseltine, Katherine A., Yue, Chan Hi, Thomas, George and Clark, Bronwyn K. (2025). Development, validation, acceptability and usability of a device-based system to measure sit-stand desk usage. Applied Ergonomics, 126 104490. doi: 10.1016/j.apergo.2025.104490
2025
Conference Publication
Bridging the gap between research and practice through government and academic partnerships: opportunities, challenges and lessons learned from Australia and New Zealand
Thomas, George, Mulchay, Samantha, Gomersall, Sjaan, Richards, Justin and Andrews, Lara (2025). Bridging the gap between research and practice through government and academic partnerships: opportunities, challenges and lessons learned from Australia and New Zealand. International Society of Behavioural Nutrition and Physical Activity, Auckland, New Zealand, 11-14 June 2025.
2025
Conference Publication
Do barriers, enablers, and support needs for screen use management differ by presence of siblings among Australian parents of young children?
Thomas, George, Duncombe, Stephanie, Gomersall, Sjaan, Morawska, Alina, Vergeer, Ineke and Biddle, Stuart (2025). Do barriers, enablers, and support needs for screen use management differ by presence of siblings among Australian parents of young children?. International Society of Behavioural Nutrition and Physical Activity, Auckland, New Zealand, 11-14 June 2025.
2025
Journal Article
Clusters of healthy lifestyle behaviours are associated with symptoms of depression, anxiety, and psychological distress: a systematic review and meta-analysis of observational studies
Bourke, Matthew, Wang, Hiu Fei Wendy, McNaughton, Sarah A., Thomas, George, Firth, Joseph, Trott, Mike and Cairney, John (2025). Clusters of healthy lifestyle behaviours are associated with symptoms of depression, anxiety, and psychological distress: a systematic review and meta-analysis of observational studies. Clinical Psychology Review, 118 102585, 102585. doi: 10.1016/j.cpr.2025.102585
2025
Journal Article
How physical activity context relates to cognition across the lifespan: a systematic review and meta-analysis
Mavilidi, Myrto F., Vazou, Spyridoula, Lubans, David R., Robinson, Katie, Woods, Andrew J., Benzing, Valentin, Anzeneder, Sofia, Owen, Katherine B., Álvarez-Bueno, Celia, Wade, Levi, Burley, Jade, Thomas, George, Okely, Anthony D. and Pesce, Caterina (2025). How physical activity context relates to cognition across the lifespan: a systematic review and meta-analysis. Psychological Bulletin, 151 (5), 544-579. doi: 10.1037/bul0000478
2025
Journal Article
Unpacking the relationship between autism, sport participation, and adolescent health: a causal mediation analysis
O'Flaherty, Martin, Hill, Jessica, Bourke, Matthew, Fortnum, Kathryn, Thomas, George, Gomersall, Sjaan R. and Cairney, John (2025). Unpacking the relationship between autism, sport participation, and adolescent health: a causal mediation analysis. Disability and Health Journal, 18 (3) 101832, 1-8. doi: 10.1016/j.dhjo.2025.101832
2025
Journal Article
Association between 24-hour movement behaviors and adiposity in children and adolescents: A compositional data meta-analysis
Bourke, Matthew, Harrison, Zoe, Fortnum, Kathryn, Thomas, George, O'Flaherty, Martin, Mulcahy, Samantha K., Gomersall, Sjaan R., Alsop, Tahlia, Trost, Stewart G., Koplin, Jennifer J., Bruijns, Brianne A., Phillips, Sophie M., Vanderloo, Leigh M., Tucker, Patricia, Hesketh, Kylie D., Kwan, Matthew Y. W. and Cairney, John (2025). Association between 24-hour movement behaviors and adiposity in children and adolescents: A compositional data meta-analysis. Obesity Reviews, 26 (5) e13884, e13884. doi: 10.1111/obr.13884
2025
Journal Article
Construct validity and reliability of the effective early childhood physical literacy pedagogue (ECE-PLP) self-report instrument
Barratt, Jaime, Dudley, Dean, Stylianou, Michalis, Thomas, George, Wheeler, Kai and Cairney, John (2025). Construct validity and reliability of the effective early childhood physical literacy pedagogue (ECE-PLP) self-report instrument. Measurement in Physical Education and Exercise Science, 29 (2), 145-159. doi: 10.1080/1091367x.2024.2422309
2024
Conference Publication
Evaluation of the Motus wearable-sensor-based system to classify postures and movements in 3-14 aged children
Rasmussen, Charlotte, Hendry, Danica, Thomas, George, Beynon, Amber, Stearne, Sarah, Zabatiero, Julianna, Davey, Paul, Rohl, Andrew, Straker, Leon and Campbell, Amity (2024). Evaluation of the Motus wearable-sensor-based system to classify postures and movements in 3-14 aged children. International Society for Physical Activity and Health, Paris, France, 28-31 October 2024.
2024
Conference Publication
Associations of early childhood screen use contexts with cognitive and psychosocial outcomes: A systematic review and meta-analysis
Mallawaarachichi, Sumudu, Burley, Jade, Mavilidi, Myrto, Howard, Steven, Straker, Leon, Kervin, Lisa, Staton, Sally, Hayes, Nicola, Machell, Amanda, Torjinski, Marina, Brady, Brodie, Thomas, George, Horwood, Sharon, White, Sonia, Zabatiero, Julianna, Rivera, Clara and Cliff, Dylan (2024). Associations of early childhood screen use contexts with cognitive and psychosocial outcomes: A systematic review and meta-analysis. International Society for Physical Activity and Health, Paris, France, 28-31 October 2024.
2024
Conference Publication
Exploring Australian parents’ perceptions of young children’s screen use
Thomas, George, Vergeer, Ineke, Rowland, Deborah, Kolbe-Alexander, Tracy, Krishnamoorthy, Govind, March, Sonja, Gomersall, Sjaan and Biddle, Stuart (2024). Exploring Australian parents’ perceptions of young children’s screen use. International Society for Physical Activity and Health, Paris, France, 28-31 October 2024.
Funding
Past funding
Supervision
Availability
- Dr George Thomas is:
- Available for supervision
Looking for a supervisor? Read our advice on how to choose a supervisor.
Available projects
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Health and Wellbeing Centre for Research Innovation
We currently have opportunities available for multiple higher degree research (HDR) students to join the Health and Wellbeing Centre for Research Innovation (HWCRI). In 2022, UQ received foundation funding from Health and Wellbeing Queensland (HWQld) to co-fund the creation of the Health and Wellbeing Centre for Research Innovation (HWCRI). In partnership with HWQld, HWCRI provides clinical and research expertise in in the fields of physical activity and nutrition with a population and preventative health focus, to inform HWQld’s program design, delivery and evaluation. HWCRI conducts innovative and novel high impact transdisciplinary research in community health and wellbeing across the lifecourse, to reduce health inequities and improve the health and wellbeing of all Queenslanders. The UQ HWCRI aims to translate research and evaluation findings into concepts and products for population level, state-wide implementation; and to build and sustain capacity in health promotion expertise by providing ‘real world’ training opportunities for undergraduate, post-graduate and higher degree research (HDR) students and fellows.
Successful applicants will be part of the School of Human Movement and Nutrition Sciences which is consistently ranked in the world’s Top 5 and is highly regarded nationally and internationally for its teaching, research and community outreach programs. The 2021 QS World Rankings by subject area ranked UQ first in Australia and second in the world in sports-related subjects. They will also be supported and conduct research in partnership with Health and Wellbeing Queensland (HWQld) which is a Queensland Government prevention agency aimed at improving population health and reducing health inequities by reducing the burden of chronic disease across the state. The health and wellbeing of the next generation of Queensland children is a key focus for HWQld and offers a once in a life-time opportunity to change the lives of the next generation where every Queenslander can live their best life, regardless of where they live.
This opportunity would suit students with a background in allied health, health promotion, public health, health psychology, implementation science, or human movement studies. Excellent communication and interpersonal skills are essential. Experience working with industry stakeholders and knowledge of qualitative and quantitative research methods and behaviour change would be of benefit. First Nations applicants are particularly encouraged to apply. This is a unique opportunity to be at the forefront of this exciting new research centre and engage with industry partners and government and specific programs of research can be tailored based on the applicant’s interest and previous experience and expertise.
Supervision history
Current supervision
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Master Philosophy
Time cost and fatigue associated with sports participation for athletes with and without severe to profound disability and high support needs, a comparative analysis
Associate Advisor
Other advisors: Professor Sean Tweedy, Associate Professor Sjaan Gomersall
Media
Enquiries
Contact Dr George Thomas directly for media enquiries about:
- Adolescents
- Children
- Physical activity
- Screen use
- Sedentary behaviour
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