Scaling mesh groups like in MMORPG chara creators

Hi,
I want to model human bodies in blender and so I am looking for a comfortable way to set the proportions of the body. Some MMORPGs do that very well, like in this video

Whats the best solution to receive a similar effect in blender? Im new to blender, so I dont know anything here. But I assume, that its somehow possible to set groups and scale them, could that be it?

Thanks.

There is a similar program called “Make Human”,the model can be imported into blender for further modeling as well.

http://www.makehuman.org/

It’s good for practice.