The common popular opinion is running is bad for your knees and hips. A recent systematic review from JOSPT shows the is opposite may be true. This large observational studies shows lower rates of OA in recreational runners.
Alentorn-Geli, Eduard, et al. "The Association of Recreational and Competitive Running With Hip and Knee Osteoarthritis: A Systematic Review and Meta-analysis." journal of orthopaedic & sports physical therapy 0 (2017): 1-36.