Yes, one can do this sitting down...

...and, by the way, one can do this lying down as well,
and... while standing up!

Interestingly, when I stand 'at attention' so to speak - the military pose - the energy flows tremendously!
Who knows how much Samurai training made use of this to get at the extra energy needed in combat...?

What follows  is definitely not what Kundalini is about!
Considering the "bilateral" brain - the masculine use of it
... or rather its masculine abuse...
Is it still bilateral or has it become abusively single-minded when the following happens
What can happen when only the left half is used!

(Click here for picture source)