[@Zeroth] I think I'm going to take the skill rank point and, assuming I can allocate it, put it into Akeno's martial arts skill.

After that I think she would just spend the rest of her time that night finding a relatively isolated spot to sleep for the night (not outside the camp, but somewhere out of the way) and then do as many sit-ups, push-ups and squats as she could managed before falling asleep; the exercises are in that order, so if she can't do all of them before getting worn down she's starting with the sit-ups.