I had to abandon my thru-hike this year because of my knees. It's the culmination of knee problems going back to 1997, primarily patellofemoral osteoarthritis. Subject to confirming MRIs, I am looking at total knee replacements if I want to hike again or engage in any leg activity more strenuous than going from the sofa to the bathroom and back. My orthopedic surgeon is very open to my resuming hiking, even long-distance backpacking, after the surgery, physical therapy and rehab, but he avoids any promises and cautions that I might find limitations.
I would like to hear from some WhiteBlazers who have been through total knee replacements and what your hiking has been like since, especially if you have thru-hiked. I haven't given up my dream yet. 20 years of section hiking haven't cured me of wanting to thru-hike.
Please trust me when I say that I have tried many, many alternatives to total knee replacements, and if possible, try to restrain from suggesting use of sticks (I do), lightweight pack (I do), stretching (I do), various Glucosamine formulations (been there and done that), proteolytic enzymes (ditto), straps and braces, etc. I really want to hear from hikers who have been through total knee replacement(s) and what your experience has been like!
Thanks!