“ With age, your physical agility may go down; your aliveness need not go down ”
Your problem is just this - your body and your mind are not taking instructions from you, that's all.
Comfort comes from the mind. Change your mental attitude and you will not feel discomfort.
The conclusions that you make in your mind can seriously impede your ability to experience life
Don't allow your mind to tell your heart what to do. The mind gives up easily