I pulled something in the back of my right foot about a month ago, probably achilles tendon related according to Dr. Google; nothing catastrophic, just sore when it gets stretched. So I've been a bit grumpy over that, and holding off on doing a lot to make sure it can heal. Finally did a very easy bike ride on the trainer this morning, which the foot did fine with. Not so much the attempt to do a downward facing dog pose afterward, but had plenty of warning before I did any more damage there. So I have an option to stay active, even if I can't jump or run at the moment.