I've been on my couch watching Netflix for HOURS before. I'm not proud, and yet, I'm not sad about it either.
Well, now there's an app to get you moving during those veg sessions. 

The Netflix Personal Trainer connects to your phone or tablet via Bluetooth and monitors your activity levels and uses your hand-selected character to give you a warning you if you slow down. If you stop the workout altogether, Netflix pulls the plug on your viewing.

   (Mashable)