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newtoon t1_iwkiv6v wrote

Well, I understand, but knees are nevertheless neither made for sitting all day nor running (especially on hard roads), but for walking (a lot). If knees hurt after running one day later with age, it's cartilage that went away. Then, stop immediately this activity and walk (or swim too) instead. My parents are therapists and were very happy that running became a standard sport : it put food on the table...

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