From The Grey House:
Now that she could move around, Natalia did a number of exercises each day. She wasn’t allowed outside the room, but she could walk, even jog around the room. She did squats and sit ups, anything. She didn’t hide what she was doing from anyone. If the door opened while she was jogging, she continued to jog. Dean brought her food on a more regular basis and talked to her. She rarely saw Zechariah and she never saw Marshal. After what seemed about a week, Dean took her on a walk outside.
“This is a nice surprise.”
“Zechariah said you probably won’t try and escape after I show you these.”