I HATE working out. One thing I found that worked for me was to simply do 5 pushups and 10 squats first thing stepping out of bed. No matter what. Takes a few seconds and it's done before you can complain about it. After a while I bumped the numbers up. Then again and again. I still wasn't doing a long workout, but it was something and it made a big difference in eliminating wrist and back pain from sitting all day.
After a few months something would happen and I'd stop. Then after a few more months, the pain would start again and I'd get back into it the same way.
After a few months something would happen and I'd stop. Then after a few more months, the pain would start again and I'd get back into it the same way.