Your last paragraph makes me sad, because walking in nature, along with gardening, are my main sources of pleasure. A year ago I did a 2 mile hike near my house once a week. I also prepped and planted all my flower beds.
I last tried the hike a month ago (sheer stubbornness) and it was painful from the first step. I grimly pushed on. I’ve also tried walking in my neighborhood recently, just a mile. Every body part involved in walking, from my waist down, hurts the entire time. Of course I was in a lot of pain for several days afterward, worse than usual. Hobbling. Struggling to get up steps.
This is a progressive disease. It sucks.