I knit like crazy yesterday. I spent two full hours knitting on the Eyelet-Cable Tank while watching an afternoon movie, then switched over and got the front of the B&B Pullover started and worked on it for two and a half hours while watching yet another movie. All in all, I spent a lot of time sitting on my butt (although productively). It was just too darn hot to do anything more physical!
This morning I am going to gingerly test my back by spending a few minutes on the exercise bike. Obviously, after yesterday's knitting marathon, I have proven that my back can now endure longer periods of sitting.