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Qigong is the proper way of spelling it.

Chi is an old way of spelling it before the english has any clue as to chinese language. It sounds like Chi but is spelt Qi

ive seen loasa of these type of things on youtube. why do you say they are non-commercial though?

I take martial arts because its great for the health both physically and mentally, not a lot of sports have both of these.

some great movies listed here. Personally I like Game of Death as number 1 of all time, although it's not included in this top 10 martial arts movies list though - but it should be!