Sam Liu

Sam Liu
Assistant Professor

BPHE, MSc, PhD (University of Toronto) , Post-Doctoral Fellow (University of California LA)

Office: MCK 124


Dr Sam Liu's research focuses on two main areas: 1) developing and evaluating the effectiveness of digital communication technology (e.g. Internet, mobile phones, social media) to help individuals prevent chronic diseases, 2) finding innovative ways to monitor and predict behaviours and health outcomes using big data in order to better target and personalize digital health interventions.

Research interests

  • Chronic disease prevention and management
  • eHealth/mHealth
  • Big Data and health surveillance
  • Physical activity
  • Health Promotion

Selected publications

Liu, S., Young, D. E. A survey of social media data analysis for physical activity surveillance. Journal of Forensic and Legal Medicine (In press) DOI:

Liu, S., Smith, J., Yu, DJ., Zhu, M., Rasin, A. Young, SD. Methods of using social media technologies to monitor levels of perceived stress and emotional state in college students. Journal of Medicine and Internet Research (In Press)

Liu, S., Brooks, D., Thomas, S., Eysenbache, G., Nolan, R. Lifesource XL-18 (2015) Pedometer for Measuring Steps under Controlled and Free-living Conditions. Journal of Sports Science.  33(10):1001-6. DOI:10.1080/02640414.2014.981847

Liu, S., Hodgson, C., Zbib, A., Payne, A., Nolan, R. The Effectiveness of Loyalty Rewards to Promote the Use of a Heart Health e-Platform. (2014) Journal of Medicine and Internet Research 16( 7)e163. doi: 10.2196/jmir.3458.

Liu, S., Dunford, SD., Yvonne WL., Brooks, D., Thomas, SG., Eysenbach, G., Nolan, RP. (2013). Reducing blood pressure using internet-based interventions: a meta-analysis. Canadian Journal of Cardiology,29(5):613-21.

Nolan, R.P., Liu, S.,Feldman, R., Dawes, M. et al. (2013). Reducing risk with e-based support for adherence to lifestyle change in hypertension (REACH): Protocol for a multi-centered randomized controlled trial. British Medical Journal Open, 3:e003547