Erring on the side of caution
Yes, it will definitely be a yoga day instead of a walking day. My lower back is stiff. Not so much that I couldn't walk, but enough that it might hurt too much if I keep pushing it. I wouldn't mind also doing some swimming later, but we've got a guy coming to do some various projects around the house. I'll be juggling him along with some cooking I plan to do and two conference calls.