NEW-Vi Anti-Slip Kayak Seat Cushion - Waterproof Thicken Gel Boat Kayak Canoe Rowing Stadium Pad for Sit in Kayak Chair Kayak Accessories Equipment Gear for Fishing Kayak

I have major back problems as well. I use a thick silicone pad from Amazon (https://a.co/d/04IoRnIf) and have a seat that allows me to recline back when I start feeling the pain. Aside from that, extra strength excedrin is your friend