I never had back problems but lockdown is doing its thing. I used to be involved in all kinds of indoor team sports (soccer, basketball, volleyball) & was a regular visitor to a gym. I don't move much nowadays. I go for a walk every evening. I have a pair of dumbells. Needless to say it does not replace a fully equipped gym. There's no room for a proper power rack in my tiny apartment. So yeah, I hope this pandemic ends before I develop health issues from sitting too much.