"I challenge you..." he laughed, pointing at Madara, "to work out with Rock Lee for an hour or two... see how well you pace."

(Rock Lee, of course, had only two settings - ridiculously over-exuberant and whatever comes AFTER that!)

The kids were right, though. Overdoing it wasn't going to help him regain the fitness that he lost to illness. It had taken him a good six months or more to be able to walk any kind of distance by himself. And even then, he needed extra oxygen in those damaged lungs of his. Even basic taijutsu was going to wear him out quickly.

"Now... who's up... for a long, relaxing soak?"