Hi, I had a THR, left, Jan. 13, 2020. I am a long way from feeling normal, despite lots of walking and rehabilitation exercises. I ran an average of 70 miles per week in 2018, then had a very quickly evolving osteoarthritis, which led to my being on crutches for nearly a year before surgery. The resulting muscle atrophy is likely what is causing my gait instability and soreness. It is improving very slowly. My advice is to take your time, but be persistent!