“As we age, the another thing we can easily’t change may be the period of time we’ve had on our joints. So at 55 you might have fifty five-calendar year-aged knees,” suggests Dominic King, a sports medicine doctor and director of clinical transformation at Cleveland Clinic’s Orthopaedic & Rheumatologic Institute. https://www.theorthopaedicandpainpractice.com/understanding-and-treating-elderly-knee-pain/