Well general Hercules, I'm trying to figure out what the hell they are doing. Ok. Some may say that he started practicing on his indoor hard court because he is playing on hard court in late December and January, getting ready for the Australian Open. I don't know, maybe so. Some say Nadal's team should know best...well, his history of injuries doesn't tell me this.
It is very early in his return to practice. I would have thought a better strategy would be to take it easy at first and start back practicing on clay for the first month and build a solid foundation, and then after putting in the hard miles, he would switch to the hard courts in mid - December or so, and thus limit is body to the pounding required on hard courts.
Doesn't Novak Djokovic do his foundation practice on clay in Monte-Carlo when he is not playing and only switch to hard court practice when he is getting close to playing?