Michael Kjær

Michael Kjær is a Clinical Professor at the Department of Clinical Medicine, University of Copenhagen, Faculty of Health and Medical Sciences. He specializes in Internal Medicine: Rheumatology and leads research groups focused on exercise physiology, sports injuries, and aging. His work addresses the impact of physical activity on the human organism, with particular emphasis on tissue damage and repair mechanisms.

Dr. Kjær's primary research interests center around sports medicine, physiology, and exercise science. His work investigates tendon pathology, muscle physiology, sports injuries, and the effects of exercise on aging populations. He has made significant contributions to understanding sports-related injuries, particularly tendon overuse conditions, and the physiological responses to physical activity across different age groups.

His recent publications (2025) demonstrate a strong focus on tendon research, sports injury treatment dilemmas, effects of anabolic steroid abuse, muscle physiology, and bone health in athletes and older adults. The research spans from basic science investigations of cellular mechanisms to clinical studies addressing practical sports medicine challenges. His work shows particular strength in connecting molecular and tissue-level changes with clinical outcomes in sports medicine.

With 415 research outputs including 369 journal articles, 15 book chapters, and 15 reviews, Dr. Kjær maintains an active research program with substantial impact. His work has been referenced in Wikipedia pages, cited by Bluesky users, and picked up by news outlets, demonstrating its relevance to both academic and public discourse.

Dr. Kjær leads multiple research groups within the Center for Healthy Aging Damage and Repair at the Department of Clinical Medicine. His laboratory work focuses on tissue response to injury and exercise, particularly examining tendon and muscle physiology using both in vivo and in vitro approaches. His research bridges basic science with clinical applications in sports medicine and rehabilitation.