@jum13, as a former physical education instructor I have been lucky enough to maintain a healthy body and attitude toward exercise. I am far from being a "Pump It Up" type of gal preferring consistency and moderation over intensity. In fact, I often wonder if it is the healthier route!
When you mentioned your 20k a day, I immediately thought, too much! Have you tried a more moderate routine with less time spent on one activity and incorporating other forms of movement?
I do a morning routine of leg and hip stretches with some foot massage before I even get out of bed. Just a few minutes, but very helpful for the neuropathy issues. My exercises classes (at a senior center) cover a wide range of low to moderate aerobic movement, lots of stretching, some strength work and most importantly for me, balance.
My choices are based on my goals. I do what makes me feel good and leaves me with a desire to return. I do not believe that intensity and worse, pain will ever inspire me to continue showing up no matter how much "better" my body looks or feels later on. So, yes, I could do more in an effort to improve the nerve damage in my legs. But, I'd rather be enjoying my life as I patiently wait for the slower progress.