There is a new exercise program in the NICU called the Will Kenyon workout. It involves being Will's nurse for the night. You set his oxygen level at 40 percent, leave the room, hear his sensors beep as his saturation level drops, go in to turn him up, leave the room, hear his sensors beep as his saturation level goes too high, go in to turn him down and so on and so forth. Will was like that last night, and while we were there tonight, he was doing it again. He gets comfortable and breathes well, then after a while, he starts to fidget and starts breathing poorly. That causes his oxygen saturation to yo-yo up and down. So, while he is doing well overall, his immature lungs continue to need a lot of work. It will take several weeks yet before he's out of the woods, but every day he can grow means a few more healthy lung cells.