This energy is physical and spiritual which can be release for a emotional reverance.
It totally exist. I've seen a kung fu master do things that wouldn't have been possible otherwise, not even with a trick (would have been injured without it). I've also experienced it myself with a discipline called Qi Gong and some simple exercises.
There are a lot of charlatans out there so be careful about where you get your information and who you are going to see if you are interested in that.
Yes it does
and of you learn some practices and focus your attention inside your body while doing these practices
you can easily feel it for yourself .
dont learn over the internet join a group or something like that when doing in a group it is even more easily experienced
No, it's all bollox.
For proof that I'm right, see Charles' anwer below.