A few years ago I went to a karate seminar in Swansea, I can't for the life of me remember the type of karate that was being demonstrated quite similar to wado-ryu but had a bigger emphasis on fluid movement and using gravity (I think that it was an old style that was just becoming popular again), the Japanese sensai there could literally flow across the floor it was amazing.
Anyhow the sensai gave a demonstration of chi energy. Get a friend and sit on the floor so that you are kneeling on both knees, rest your hands on your thighs. Now get your friend to go in a push up position so that his hands are on your wrists. Try to lift your friend by just raising your arms up, if you can you need a heavier friend.
After you have found a friend that you cant lift focus on the point about 2 fingers width below your belly button, relax and let the "energy" come from there and just let your arms come up. You should find you can now lift your friend.
That's how I found it happened, I could lift my friend who was 200+lb and I'm not a very strong guy! Has anyone else experienced anything weird like this? Is there anything in the current model of human physiology that can explain this? Is there a similar technique that guys who can lift really heavy use?
Weird thing was I remember that for about a week afterwards I experienced no pain in my arms at all and then I out of nowhere got massive DOMS. Sorry wasn't really sure where to post this but am very curious if anyone has had any similar experiences.