Ryan Marker, PhD, PT

Assistant Professor, Physical Medicine & Rehabilitation

Publications

  • Marker RJ, Kittelson AJ, Scorsone JJ, Moran IA, Quindry JC, Leach HJ. A Novel Telehealth Exercise Program Designed for Rural Survivors of Cancer With Cancer-Related Fatigue: Single-Arm Feasibility Trial. JMIR Cancer. 2025 Jan 10;11:e59478. PubMed PMID: 39793972
  • Gomes EL, Marker RJ, Bell C, Aichele S, Leach HJ. Acute effects of exercise to mitigate cancer-related fatigue: A state-of-the-art review. European Journal of Cancer Care. 2025;2025(1):5511950. https://doi.org/10.1155/ecc/5511950.
  • Dunston E, Huebschmann A, Marker R. Age Influences Cancer Survivors' Path to Exercise Oncology Programs: Referrals Are Higher Among Older Adults. 2025 Annual Research Meeting. AcademyHealth; 2025.
  • Dawson J, Marker R, Leach H. FITT-ing the Bill: Examining Cancer-Related Fatigue Through Principles of Exercise. Int J Exerc Sci: Conference Proceedings. 2025;18(1):10.
  • Oselinsky KM, Hill EB, Clark K, Marker RJ, Kabos P, Maclean PS, Thomas E, Ostendorf DM, Sandoval E, Creasy SA. An Integrated Lifestyle Program on Weight, Functional Capacity, and Exercise Self-Efficacy Among Breast Cancer Survivors. Int J Exerc Sci: Conference Proceedings. 2025;18(1):23.
  • Gomes E, Marker R, Bell C, Aichele S, Eagan J, Leach HJ. Acute Effects of Exercise Intensity on Fatigue During a Cancer-Rehabilitation Program. Int J Exerc Sci: Conference Proceedings. 2025;18(1):30.
  • O'Connor LJ, Marker RJ, Nemkov T. Investigation of Metabolic Profiles of Cancer Related Fatigue and Changes Following a Clinical Exercise Program. Med Sci Sports Exerc. 2025;57(10 Suppl):402-402.
  • Gomes EL, Marker RJ, Bell C, Aichele S, Eagan J, Leach HJ. Compliance to Multiple Daily Assessments of Cancer Related Fatigue During an Outpatient Cancer Rehabilitation Program: 1663. Med Sci Sports Exerc. 2025;57(10S):505-506.
  • Nemkov T, Cendali F, Dzieciatkowska M, Stephenson D, Hansen KC, Jankowski CM, D'Alessandro A, Marker RJ. A Multiomics Assessment of Preoperative Exercise in Pancreatic Cancer Survivors Receiving Neoadjuvant Therapy: A Case Series. Pathophysiology. 2024 Mar 20;31(1):166-182. PubMed PMID: 38535623
  • Marker RJ, Wechsler S, Leach HJ. Cancer-related fatigue is associated with objective measures of physical function before and after a clinical exercise program: A retrospective analysis. Rehabil Oncol. 2024 Jan;42(1):31-38. PubMed PMID: 38774708
  • Gomes EL, Crisafio ME, Marker RJ, Graham DJ, Leach HJ. Independent physical activity during a virtually supervised exercise program for cancer survivors. Journal of Clinical Exercise Physiology. 2024;13(1):13-17. DOI: 10.31189/2165-6193-13.1.13.
  • Leach HJ, Crisafio ME, Howell MJ, Nicklawsky A, Marker RJ. A Group-Based, Videoconference-Delivered Physical Activity Program for Cancer Survivors. Transl J Am Coll Sports Med. 2023 Spring;8(2). PubMed PMID: 37974897
  • Leach HJ, Fairman CM, Gomes EL, Marker RJ. Evaluating individual level change in physical function response following an exercise program for cancer survivors. Support Care Cancer. 2023 May 26;31(6):353. PubMed PMID: 37233792
  • Olivier GN, Dibble LE, Paul SS, Lohse KR, Walter CS, Marker RJ, Hayes HA, Foreman KB, Duff K, Schaefer SY. Personalized practice dosages may improve motor learning in older adults compared to "standard of care" practice dosages: A randomized controlled trial. Front Rehabil Sci. 2022;3:897997. PubMed PMID: 36189036
  • Marker RJ, Ostendorf DM, Leach HJ, Peters JC. Cancer-related fatigue mediates the relationships between physical fitness and attendance and quality of life after participation in a clinical exercise program for survivors of cancer. Qual Life Res. 2022 Nov;31(11):3201-3210. PubMed PMID: 35895163
  • Marker RJ, Kittelson AJ, Jankowski CM, Scorsone JJ, Peters JC, Purcell WT. Development of a reference chart for monitoring cancer-related fatigue throughout a supervised exercise program. Rehabil Oncol. 2022 Apr;40(2):82-88. PubMed PMID: 35711819
  • Marker RJ, Kakar RS, Scorsone JJ, Peters JC, Purcell WT. Single-leg stance times in a diverse group of survivors of cancer and the relationship to history of recent falls. Rehabilitation Oncology. 2021. DOI: 10.1097/01.REO.000000000000243
  • Leach HJ, Marker RJ, Scorsone JJ, Peters JC, Purcell WT. Predictors of attendance during an exercise program for cancer survivors. Support Care Cancer. 2021 Jul;29(7):3425-3428. PubMed PMID: 33594510
  • Purcell SA, Marker RJ, Cornier MA, Melanson EL. Dietary Intake and Energy Expenditure in Breast Cancer Survivors: A Review. Nutrients. 2021 Sep 27;13(10). PubMed PMID: 34684403
  • Marker RJ, Kakar RS, Scorsone JJ, Peters JC, Purcell WT. Single-leg stance times in a diverse group of survivors of cancer and the relationship to history of recent falls. Rehabilitation Oncology. 2021;39(1):23-30.
  • Hidde MC, Leach HJ, Marker RJ, Peters JC, Purcell WT. Effects of a Clinic-Based Exercise Program on Sleep Disturbance Among Cancer Survivors. Integr Cancer Ther. 2020 Jan-Dec;19:1534735420975852. PubMed PMID: 33243013
  • Marker RJ, Kittelson AJ, Jankowski CM, Scorsone JJ, Peters JC, Purcell WT. Development of a reference chart for monitoring cancer-related fatigue throughout a supervised exercise program. Rehabilitation Oncology.
  • Marker RJ, Wechsler S, Leach HJ. Cancer-related fatigue is associated with objective measures of physical function before and after a clinical exercise program: A retrospective analysis. Rehab Onc.
  • Gomes EL, Crisafio ME, Marker RJ, Graham DJ, Leach HJ. Independent physical activity during a virtually supervised exercise program for cancer survivors. Journal of Clinical Exercise Physiology.
View All (24 Total) View Less

Specialty Information

Specialties
  • Physical Therapist

School of Medicine

CU Anschutz

Fitzsimons Building

13001 East 17th Place

Campus Box C290

Aurora, CO 80045


303.724.5375