My lower back is junk

Kind of the same here. Spent over 40 years as an electrician and working on cars. Many injuries that I didn't take proper care of. Now at the age of 62 I have joint and tendon damage and arthritis though out my body. The last few years it has really hampered my ability to work an 8 hour day. Use to work a 12-14 hour day in my younger years. Really paying for it now.