Myth #7 — Running Ruins Your Knees: What 75,000-Runner Studies Actually Show
Myth #7 — Does running ruin your knees?
Decades of fitness lore say pounding pavement wears down cartilage and leads to knee osteoarthritis. Large-scale research tells a very different story.
What the evidence shows:
- A study of ~75,000 runners published in Medicine & Science in Sports & Exercise found recreational runners had significantly lower rates of knee osteoarthritis than non-runners. 1
- A systematic review in the Journal of Orthopaedic & Sports Physical Therapy concluded recreational running is not associated with increased knee OA risk — only high-volume competitive running shows a modest elevation. 2
- Exercise physiology textbooks note that cartilage is avascular and relies on cyclic loading to circulate synovial fluid and nourish chondrocytes — moderate impact is protective, not destructive. 3
The swap: Start with 20–30 min at an easy pace, 3× per week. Progressive loading protects cartilage — it's prolonged inactivity, not running, that accelerates joint deterioration.
Fuentes de referencia
- 1Williams 2013 — Running and Hip and Knee Osteoarthritis
pubmed.ncbi.nlm.nih.gov
- 2Lo et al. 2017 — Running Knee Osteoarthritis Meta-analysis
pubmed.ncbi.nlm.nih.gov
- 3
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