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Lab Members

Meet the current and former team members of the Exercise & Health Lab. We welcome requests for information about our work and collaboration opportunities. Find open lab positions here.

Principal Investigator

Siobhan Phillips, PhD, MPH

Siobhan Phillips, PhD, MPH

Interim Chief of Behavioral Medicine; Professor of Preventive Medicine (Behavioral Medicine) and Weinberg College of Arts & Sciences

smphillips( at )northwestern.edu

PhD: University of Illinois Urbana Champaign (2011)
MPH: Harvard University (2012)

View Phillips's Faculty Profile

Phillips's Bio

Phillips’s interdisciplinary research is focused on understanding the determinants and health outcomes of physical activity participation and the translation of this research into practice. Phillips is a behavioral interventionist by training and has worked with data from prospective, cohort and national datasets. She has extensive training, experience and expertise in designing, conducting and analyzing randomized exercise interventions to maximize adherence and cognitive and physical functioning as well as in using accelerometers to objectively measure physical activity. Phillips has worked with older adults, individuals with multiple sclerosis, college students, prostate cancer survivors, breast cancer survivors and childhood cancer survivors. She has published over 70 articles in the areas of physical activity, aging, cancer and implementation sciences.

Her current research interests include understanding the biopsychosocial mechanisms underlying the relationship between physical activity and health and disease outcomes; identifying the determinants of physical activity behavior change and maintenance; the intersection of cancer and aging, the role of physical activity in the primary and secondary disease prevention; and the translation of research in these areas to practice using technology and innovative study designs and methods. In her free time, she enjoys reading, running, spending time with her family and traveling.

Research Staff

Hayley Bossard

Hayley Bossard

Research Assistant

Bossard's Bio
Hayley graduated from the University of Illinois Urbana-Champaign with a B.S. in Molecular and Cellular Biology in 2026. Prior to joining the EHL, she was an undergraduate researcher in the Raetzman Lab, where she studied epigenetic mechanisms contributing to pituitary gland development. Hayley is interested in developing sustainable lifestyle interventions to improve the quality of life of cancer survivors.
Hannah Freeman

Hannah Freeman

Project Coordinator

Freeman's Bio

Freeman graduated from Boston University in 2016 with a BA in neuroscience. Prior to joining the EHL, she was working with the Young Women’s Study and Adult Survivorship research teams at the Dana-Farber Cancer Institute in Boston. She is interested in women’s health and oncology, with a focus on improving quality of life through mobile technologies. When not at the lab, Hannah enjoys spending time outdoors, cycling and volunteering at community gardens.

Ashley McDonnell

Ashley McDonnell

Research Assistant

McDonnell's Bio

Ashley graduated from the University of Notre Dame in 2026 with a B.S. in Neuroscience and Behavior and a minor in Global Health. Prior to joining the EHL, she worked as an undergraduate research assistant in the Sleep, Stress, and Memory Lab at Notre Dame and at Stanford's Biobehavioral Pediatric Pain Lab. Her interests center on how behavioral interventions can support patients navigating serious illnesses and improve patient-centered care. 

Fiona Webb

Fiona Webb

Research Assistant

Webb's Bio
Fiona Webb graduated from the University of Arizona in 2025 with a BA in Psychology. Before working in the EHL, she was a part of the REACH Lab at the UA, researching different social behavioral interventions to improve quality of life in cancer survivors. However, Fiona is particularly interested in physical fitness/exercise and how it relates to cancer survivorship. She is so excited to be a part of the EHL and Dr. Phillips' team!

Trainees

Julia Pincever (Starikovsky)

Julia Pincever (Starikovsky)

Clinical Psychology PhD Student

Pincever's (Starikovsky) Bio

Pincever (Starikovsky) graduated from the University of Maryland in 2019 with a BA in psychology and a minor in neuroscience. After college, she worked for almost two years with youth multiple sclerosis and early-onset Alzheimer’s disease populations as a clinical research coordinator at the Children’s Hospital of Philadelphia and the University of Pennsylvania. Pincever (Starikovsky) recently received her master’s degree in clinical psychology at Northwestern University and is excited to begin her PhD in clinical psychology with the Exercise & Health Lab. She is interested in creating manageable and sustainable lifestyle interventions (i.e. physical activity, mindfulness, sleep) for those with chronic illnesses.

Medical Students

  • Melanie Wolter, Northwestern University Feinberg School of Medicine
  • Ria Desai, Northwestern University Feinberg School of Medicine
  • Julia Frey, Northwestern University Feinberg School of Medicine
  • Lauren Wang, Northwestern University Feinberg School of Medicine

Interns

  • Sabrina Xu
  • Meron Mulugeta
  • Yousef Philopos
  • Shuyan Li
  • Ethan Lee

Alumni

  • Whitney Morelli (T32 Postdoc), Assistant Professor of Physical Medicine and Rehabilitation at Medical College of Wisconsin
  • Kara Gavin (T32 Postdoc), Research Scientist at Medical College of Wisconsin
  • Lisa Auster Gussman (T32 Postdoc), Researcher at Lark Health
  • Jean M. Reading (Postdoctoral Fellow), Assistant Professor of Family and Community Medicine at University of Illinois College of Medicine at Chicago
  • Madelyn Whitaker (MA Student), PhD student in Clinical Psychology at The University of Utah
  • Erin Cullather (Research Assistant), Oncology Physician Assistant at University of Pennsylvania Perelman School of Medicine
  • Brendan Hickey (Research Assistant), Medical Student at University of Illinois College of Medicine
  • Shirlene Wang (T32 Postdoctoral Fellow), Postdoctoral Scholar at Oregon Health and Science University  
  • Kristina Hasanaj (T32 Postdoctoral Fellow), Postdoctoral Scholar at Arizona State University
  • Payton Solk (PhD Student), 
  • Faye Walker (MA Student), Northwestern University Feinberg School of Medicine