Fitness program for table tennis players

[guybr50]

Hello
lately ive been rhinking a lot about the training session table tennis players are going throughout their years of training.
I wanna know how do you (coaches or self training players ) think a program of fitness of table tennis player should look like?
I mean:
-what muscles are the most important muscles table tennis player need to develop?
-what type of erobic sessions should he be doing?
-in general, how important do you think it is to have a gym/fitness program inside the whole training process? Is this neccessary?
-should a pro-high level club have a fitness coach seperately from the headcoach?
- in favore or against using the gym for the fitness session?

You are welcome to add points of disscussion as you wish.
any comment would be appreciated, although i would really like to hear from the most experienced and prossional coach/player in here,
so... As always, have a great disscussion ^^

 

[HLDang]

Me and the guys from my college team usually go running or swimming before each practice. On the side, I usually do leg and core exercises that focus on the lower body but also incorporate some upper body.