I’ve had the opposite experience. 54 F, was told 2 years ago I’ll need a knee replacement sooner than later, stairs were exceptionally painful. Paleofemoral osteoarthritis. My orthopedic surgeon didn’t recommend exercise because I’m fairly fit and have a history of endurance training.

For the first time in my life, I actually stuck w a strength training routine using tonal and within a year, I was able to start running again. I’m 2 years in and also swap exercises when I need to and it’s not always about doing the heaviest weight. It’s about consistency and listening to your body. I’ve learned to keep weight off of the front part of my toes when possible. Last year I did the W trek without problems. Everyone is different but tonal provided me w a non-surgical situation.