Contact information
Research groups
Colleges
Collaborators
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David Beard
Professor of Musculoskeletal and Surgical Science
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Cyrus Cooper
Professor of Musculoskeletal Science, University of Oxford
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Loretta Davies
SITU Trials Portfolio Manager (Operational Lead)
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Kelechi Eseonu
MSc Taught Programme
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Kassim Javaid
Professor of Osteoporosis and Adult Rare Bone Diseases
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Jolet Mimpen
Senior Research Fellow in Musculoskeletal Tissue Biology
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Paul Monk
Honorary Departmental Clinical Lecturer in Orthopaedics
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Thomas Perry
Senior Molecular Epidemiologist
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Sarah Snelling
Professor of Musculoskeletal Science
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Fiona Watt
Departmental Senior Research Fellow
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Xiaotian Yang
Researcher
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Andrew Price
Professor of Orthopaedics Surgery
Stefan Kluzek
MRCP DipSEM PGCert M.Sc D.Phil FFSEM
Clinician Scientist in Sport and Exercise Medicine
knee injuries, knee osteoarthritis; molecular epidemiology; synovitis; metabolic stress-induced joint inflammation
I am a Sport and Exercise Medicine consultant with clinical and research interests in knee injuries, osteoarthritis and metabolic dysregulation. My research explores the role of inflammatory pathways in the development of knee osteoarthritis. I am particularly interested in identifying the mechanisms leading to early cardiovascular mortality in knee osteoarthritis.
As a medical student and junior doctor, I witnessed reduced mortality due to the development of evidence-based secondary prevention in cardiovascular medicine. This inspired my initial research focus on the role of stem cells in cardiac vascularisation and clinical research in cardiopulmonary exercise testing. It also stimulated interest in exercise medicine, population health and musculoskeletal medicine. Seven years ago, I entered higher specialist training in Sport and Exercise Medicine to combine my clinical and research interests.
In my MSc., I performed an extensive systematic review and meta-analysis of the effectiveness of physical activity interventions in patients with knee osteoarthritis. This made me realise that underlying mechanisms driving knee pain, disability and multiple comorbidities required further investigation before I define any new interventions. During the second year of my MSc. programme, I developed my interest in the biomarkers associated with both synovial inflammation and metabolic dysregulation, intending to develop research supporting the secondary prevention of knee osteoarthritis.
My DPhil fellowship was awarded by the Arthritis Research UK Centre of Excellence in Sport, Exercise and Osteoarthritis. My project “Markers of synovial inflammation in cohorts at risk of knee osteoarthritis” provided me with key epidemiological, statistical and laboratory skills. I designed and recruited a prospective study of individuals with recent knee injuries.
During this work, I developed a new sonographic biomarker of synovial inflammation. I tested several molecules previously associated with synovitis in the established knee osteoarthritis as potential risk factors for knee osteoarthritis incidence.
Between 2016 to 2019, a subsequent competitive Clinical Lectureship has allowed me to continue research alongside my clinical training. During this time, I have increased my independent work and developed local and international collaborations to support further research.
I firmly believe that tackling knee osteoarthritis will help us reduce medical comorbidity in middle and older age - and this is the next big frontier of modern medicine after longevity has dramatically increased in the second half of the 20th century.
During my MSc, fellowship, DPhil and lectureship, I demonstrated significant dedication towards discovery, creativity, and innovation in knee injury and osteoarthritis, focusing on early stratification by identifying individuals with a high inflammatory response.
My clinical interests are in knee trauma, osteoarthritis, exercise medicine and musculoskeletal ultrasonography.
Recent publications
Influence of major trauma and lower limb loss on radiographic progression and incidence of knee osteoarthritis and pain: a comparative and predictive analysis from the ADVANCE study.
Journal article
O'Sullivan O. et al, (2026), Arthritis Res Ther
Severe pincer morphology is associated with incident hip osteoarthritis: prospective individual participant data from 18 935 hips from the World COACH consortium.
Journal article
Riedstra N. et al, (2026), Br J Sports Med, 60, 108 - 115
Cam morphology and the risk of developing radiographic hip osteoarthritis within 8 years: an individual participant data meta-analysis of 23 886 hips from the world COACH consortium.
Journal article
Tang J. et al, (2026), Br J Sports Med, 60, 28 - 35
Motor unit discharge properties of the vastii muscles and their modulation with contraction level depend on the knee-joint angle.
Journal article
Valenčič T. et al, (2026), J Appl Physiol (1985), 140, 322 - 337
73 years and going strong. BASEM’s ongoing journey. Many changes and much stays the same…
Journal article
Wheeler PC. et al, (2025), British Journal of Sports Medicine, 59, 1705 - 1706
Biomarkers of osteoarthritis progression: collagen-derived markers and their potential translational utility.
Journal article
Kluzek S., (2025), Rheumatology (Oxford)
Bracing for Nonsurgical Management of Acute Anterior Cruciate Ligament Tears.
Journal article
Singh K. et al, (2025), Clin J Sport Med
Insights into knee post-traumatic osteoarthritis pathophysiology from the relationship of serum biomarkers to radiographic features in the ADVANCE cohort.
Journal article
O'Sullivan O. et al, (2025), Arthritis Res Ther, 27
Scraping the Surface: A Guide to Data Collection Using Web Scraping in Sports Medicine.
Journal article
Pinkoski AM. et al, (2025), J Strength Cond Res
Hip Morphology-Based Osteoarthritis Risk Prediction Models: Development and External Validation Using Individual Participant Data From the World COACH Consortium.
Journal article
van den Berg MA. et al, (2025), Arthritis Care Res (Hoboken)
3 Longitudinal incidence, progression and predictors of radiographic knee osteoarthritis and pain in a trauma-injured cohort – ADVANCE follow-up findings
Conference paper
O’Sullivan MO. et al, (2025), BMJ Military Health, 171, e3.3 - e3.3
Student perceptions of novel and traditional anatomy teaching tools in sport and exercise science
Journal article
Noel-Barker NL. et al, (2025), European Journal of Anatomy, 29, 401 - 412
Serum sampling proximal to the joint or after exercise influences biomarker concentration and potentially improves understanding of joint microenvironment: a pilot case-control study
Journal article
O'Sullivan O. et al, (2025), F1000Research, 14, 395 - 395
cetabular dysplasia and the risk of developing hip osteoarthritis within 4-8 years: An individual participant data meta-analysis of 18,807 hips from the World COACH consortium.
Journal article
Riedstra NS. et al, (2025), Osteoarthritis Cartilage, 33, 373 - 382
Novel Method for Routine Ultrasound-Guided Serum Collection for Biomarker Analysis Around the Knee Joint.
Journal article
Kluzek S. and O'Sullivan O., (2025), F1000Res, 14
The Effect of Dark Chocolate Consumption on Arterial Function in Endurance Male Runners: Prospective Cohort Study.
Journal article
Vordos Z. et al, (2024), Sports (Basel), 12
Motor unit discharge properties of the vastii muscles and their modulation with contraction level depend on the knee-joint angle
Preprint
Valenčič T. et al, (2024)
ssociation of serum biomarkers with radiographic knee osteoarthritis, knee pain and function in a young, male, trauma-exposed population - Findings from the ADVANCE study.
Journal article
O'Sullivan O. et al, (2024), Osteoarthritis Cartilage, 32, 1636 - 1646
Comparison of Blood Flow Restriction Interventions to Standard Rehabilitation After an Anterior Cruciate Ligament Injury: A Systematic Review.
Journal article
Colombo V. et al, (2024), Am J Sports Med, 52, 3641 - 3650
Drawing 2024 to a close, and welcoming in 2025 …
Journal article
Wheeler PC. et al, (2024), British Journal of Sports Medicine, 58, 1473 - 1474