Fellowship Faculty

Dr. Jack Spittler

Jack Spittler, M.D. 


Program Director Since: 2019


Program Faculty Member Since: 2014


Primary Board Certification: Family Medicine – 2013


Additional Board Certification: Sports Medicine CAQ 2014 Fellowship: University of Colorado


Residency: University of Colorado


Medical School: Georgetown University Special Interest: MSK ultrasound, ski/snowboard medicine, foot & ankle, shoulder.


Tidbit About Yourself: I am originally from Ann Arbor, Michigan and moved to Colorado for my residency/ fellowship training.  I've stayed here ever since because it's an amazing place to live, explore, and practice sports medicine!  My main hobbies are skiing, golfing, mountain biking, and hiking with my wife (Jen) and son (Luke).


Email: john.spittler@cuanschutz.edu

Dr. John Hill


Associate Program Director Since: 2019, Primary Care Fellowship Track

Program Director Since: 1998

Primary Board Certification: Family Medicine

Additional Board Certification: CAQ Sports Medicine ABFM, AOA (American Osteopathic Association), Family Medicine and Sports Medicine

Fellowship: Created PCSM Fellowship at University of Colorado

Residency: University of Missouri at Kansas City 

Medical School: Western University of Health Sciences/College of Osteopathic Medicine of the Pacific, Pomona, CA

Special Interest: MSK and Sports Ultrasound, Exercise physiology and performance physiology, women’s health, race medicine, climbing, high altitude medicine, ski/snowboard medicine.

Tidbit about Yourself: A Colorado native. In 1998, I created the primary care sports medicine fellowship at the University of Colorado. In 2000, I was one of the first sports medicine doctors in the United States to use musculoskeletal ultrasound. I developed many of the initial approaches and techniques for diagnostic and interventional MSK ultrasound. I am a team physician at the University of Denver and have been the Men’s soccer team physician for 12 years. I have competed in road and mountain bike racing, triathlons and running races, including the Boston marathon and was a 2010 Leadman, completing all the Leadville races in a single season including the Leadville 100 Ultramarathon and Mountain bike race. I have been married to Gail for 36 years and have two daughters.

Email: john.hill@cuanschutz.edu

Dr. Aubrey Armento

Aubrey Armento, M.D.

Program Faculty Member Since: 2019, Pediatric Fellowship Track

Primary Board Certification: Pediatrics – 2018

Additional Board Certification: Sports Medicine CAQ – 2019

Fellowship: University of Minnesota

Residency: University of Colorado

Medical School: Medical College of Georgia at Augusta University

Special Interest: Endurance athletes, running medicine, the female athlete triad, relative energy deficiency in sport (RED-S), bony stress injuries, athlete mental health, and injury prevention.

Tidbit About Yourself: In my free time, you can usually find me out running on the road, track, or trails. I also enjoy hiking, skiing, cooking, reading, and exploring the mountains with my husband and friends.

Email: aubrey.armento@childrenscolorado.org

Dr. Bradley Changstrom

Bradley Changstrom, M.D.

Program Faculty Member Since: 2015, Primary Care Fellowship Track

Primary Board Certification: Internal Medicine - 2014

Additional Board Certification: Sports Medicine CAQ - 2015

Fellowship: University of Minnesota   

Residency: University of Colorado

Medical School: University of Colorado 

Special Interest: Tennis medicine, hockey medicine, concussion management, exercise is medicine and cardiac conditions in the athlete.

Tidbit About Yourself: I am lucky to work as a team physician with talented colleagues in primary care sports medicine, orthopedics, physical therapy and athletic training.  I enjoy teaching medical students, residents and fellows as a regular part of my practice.  Email

Email: bradley.changstrom@cuanschutz.edu    

Dr. Stephanie Chu

Stephanie Chu, D.O.

Program Faculty Member Since: 2008, Primary Care Fellowship Track

Primary Board Certification: Family Medicine 

Additional Board Certification: Sports Medicine CAQ -

Fellowship: University of Connecticut 

Residency: University of Connecticut

Medical School: Ohio University of Osteopathic Medicine

Special Interest: Female Athletes, Running Medicine, Dance Medicine, Gymnastics

Tidbit About Yourself: I have been with the University of Colorado as a Team Physician since 2008. I helped to start and spearhead the Student Athlete Wellness Team at the University of Colorado which is a multidisciplinary group that cares for the athlete from a nutritional, psychiatric, medical and training aspect to better their overall health and performance. In my “free” time I enjoy volunteering with the non-profit Hope Shines, Inc. that works with orphans and vulnerable children in Rwanda as the medical consultant and volunteer coordinator.

Email: stephanie.chu@cuanschutz.edu

Dr. Morteza Khodaee

Morteza Khodaee, M.D., M.P.H. 

Program Faculty Member Since: 2006, Primary Care Fellowship Track

Primary Board Certification: Family Medicine – 2004, 2014

Additional Board Certification: Sports Medicine CAQ – 2005, 2015

Fellowship: University of Michigan

Residency: University of Michigan

Medical School: Tehran Azad University, Iran

Special Interest: Sports injury prevention, ultra-endurance sports, exercise promotion, medical education. 

Tidbit About Yourself: I love teaching clinical skills to students, residents, and fellows. Nothing is more enjoyable than mentoring scholarly activities to trainees from all different backgrounds.  

Email: morteza.khodaee@cuanschutz.edu

Laurie Lemmel

Laurie Lemmel

Program Coordinator Since: 2018

Tidbit About Yourself: I have been a program coordinator with the University of Colorado for the past thirteen years. I recently transitioned to the program coordinator position for the Sports Medicine Fellowship, Addiction Medicine Fellowship & the Hospice & Palliative Medicine Fellowship I am excited to work with the wonderful physicians, fellows and staff in the program and serve as a representative of the Department of Family Medicine in Graduate Medical Education. In my free time, I enjoy doing anything creative; home remodeling, cooking, gardening, flower arranging.    

Email Address: laurie.lemmel@cuanschutz.edu  

Dr. Sourav Poddar

Sourav Poddar, M.D. 


Program Faculty Member Since: 2001, Primary Care Fellowship Track

Primary Board Certification: Family Medicine – 2000, 2017

Additional Board Certification: Sports Medicine CAQ – 2002, 2012

Fellowship: University of Colorado 

Residency: University of Colorado

Medical School: University of Texas Southwestern Medical School

Special Interest: Orthobiologics, sports related concussion, shoulder, knee, tendinopathies, arthritis in the active individual.

Tidbit About Yourself: As Director of the Primary Care Sports Medicine program in the DFM, I marvel at the breadth, depth and diversity of the faculty I work alongside.  Family, food, fitness, and travel are priorities.        

Email: sourav.poddar@cuanschutz.edu

Dr. Aaron Provance

Aaron Provance, M.D.

Program Faculty Member Since: 2007, Pediatric Fellowship Track

Primary Board Certification: Pediatric - 2009

Additional Board Certification: Pediatric Sports Medicine - 2010

Fellowship: University of Colorado 

Residency: University of West Virginia 

Medical School: University of West Virginia

Special Interest: Adventure and extreme sports injuries in pediatric and adolescent athletes.

Tidbit About Yourself: I enjoy ski mountaineering, ice climbing, as well as skiing and biking with my wife and three kids. I was able to obtain one of my lifelong goals of summiting Denali in 2012. I race for Boulder Cycle Sport cycling team and compete in mountain biking and cyclocross events.

Email: aaron.provance@childrenscolorado.org  

Dr. Emily Sweeney

Emily Sweeney, M.D. 

Program Faculty Member Since: 2015, Pediatric Fellowship Track

Primary Board Certification: Pediatrics - 2013

Additional Board Certification: Pediatric Sports Medicine CAQ - 2014

Fellowship: Nationwide Children’s Hospital

Residency: Phoenix Children’s Hospital/Maricopa Medical Center

Medical School: University of Missouri-Columbia School of Medicine

Special Interest: Sports injuries in gymnastics, injury prevention in gymnastics, spondylolysis and low back pain in athletes

Tidbit About Yourself: I grew up doing gymnastics but had to quit due to a back injury.  Now I enjoy doing CrossFit, hiking, biking and hanging out with my husband.

Email: emily.sweeney@childrenscolorado.org

Dr. Karin VanBaak

Karin VanBaak, M.D. 

Program Faculty Member Since: 2016, Primary Care Fellowship Track

Primary Board Certification: Family Medicine - 2015

Additional Board Certification: Sports Medicine - 2016

Fellowship: University of Minnesota – Sports Medicine, University of Minnesota – Faculty Development

Residency: University of Colorado 

Medical School: University of Connecticut School of Medicine

Special Interest: The intersection of primary care and sports medicine, female athlete & active women, endurance athlete, mental health in sports medicine and interdisciplinary care in sports medicine.

Tidbit About Yourself: In my free time, I enjoy trail running, hiking, skiing (alpine & Nordic), travel, tending to my vegetable garden, and learning to ride horses. My husband and I foster retired racing greyhounds in search of new homes, and spend the rest of our free time working on our 'fixer-upper' home in Boulder. 

Email: karin.vanbaak@cuanschutz.edu 

Dr. Gregory Walker

Gregory Walker, M.D.  

Program Faculty Member Since: 2018, Pediatric Fellowship Track

Primary Board Certification: Pediatrics - 2012

Additional Board Certification: Pediatric Sports Medicine CAQ - 2013

Fellowship:  Research/National Institute of Health Cincinnati Children’s Hospital Medical Center, Sports Medicine/Cincinnati Children’s Hospital Medical Center

Residency: University of Arizona

Medical School: University of Arizona 

Special Interest: Concussion, physical inactivity in youth, ankle injuries, running-related injuries and pediatric overuse injuries. 

Tidbit About Yourself: I have a love for sports, adventure, food, travel and movies. I have an incredibly supportive wife and two lovely and energetic children.   

Email: gregory.walker@childrenscolorado.org

Dr. Julie WIlson

Julie Wilson, M.D. 

Program Faculty Member Since: 2013, Pediatric Fellowship Track

Primary Board Certification: Pediatrics - 2010

Additional Board Certification: Pediatric Sports Medicine CAQ - 2011

Fellowship: Nationwide Children’s Hospital – Ohio State University 

Residency: University of Colorado

Medical School: University of Michigan Medical School

Special Interest: Concussions, soccer-related injuries, dance medicine.

Tidbit About Yourself: I am the co-director of the Concussion program at Children’s Hospital Colorado, team physician for Thornton High School, and medical director for multiple area soccer clubs.  Outside of work, I enjoy cycling, snowboarding, hiking with my husband and 2 dogs, and reading.  

Email: julie.wilson@childrenscolorado.org