I’m so sorry about your back! If it’s sore muscles I highly recommend a Tens Unit...
https://www.amazon.com/Tens-Unit-Machine-Management-Rehabilitation/dp/B00NCRE4GO
It uses electrical stimulation to cause the muscles to relax. I love mine.
I have a new favorite recipe from Facebook. I made my own Salsa Verde, with several different types of chilies, tomatillos, garlic, & onions, but a store-bought salsa verde would be fine. Take a pork loin & cook until done in a crockpot. Pour off excess liquid & then pull apart with forks for pulled pork. Then add the salsa verde & an 8 oz block of cream cheese & heat. Add back extra fluid if necessary. Excellent on flour tortillas or tortilla chips...any number of things. It would even make a great taco salad. Yum.
I’ve got one of those Tens things - I liked it so much at the Chiropractor, and was very pleased when they became available for household use. I was kind of amazed that I could buy a cheap one at the drugstore, and that it was almost as good as the treatment I received in the Doc’s office!