Would a person that focuses on strength and speed believe in internal strikes if they felt it?

Depends entirely upon the effects of the strike. Like I've said before, I believe chi is just oxygen and Tai Chi students have figured out the most efficient methods of breathing. I believe you can hit harder because you have more oxygen in your muscles but I don't believe you can shove that oxygen beyond your punch like some spiritual shock wave.

First I would have to be convinced by being hit by a very old and frail person or a child. Anyone else I have seen develop power even if they are not particularly muscular or strong. You hit someone in the right areas,it doesn't take much to cause pain. I could coach a person off the street for 15 minutes and there punch will hurt you. You can knock a person off there feet gasping for air with a very short punch.Is it chi? No you just have to understand how and where to hit. I could very easily fake chi and make true believers and let them film it or experience it. But the real explanation would change there mind again in a second back to reality.

Sure. If I'm holding a pad and a tai chi master can hit it noticeably harder than a boxer or kyokushin karateka, then I would be impressed and I would try to learn his technique. But I guarantee you that technique has nothing to do with chi, because chi is not real. Internal martial arts, from what I've seen, are all about optimizing body mechanics. If you punch with perfect form and perfect balance, you can generate a lot of power. But at a higher levels, external martial arts also place a huge emphasis on perfect form and body mechanics. So they are different paths to the same end.

No doubt i would believe it if i experienced it...to be tested and assessed ongoing in the future..but I have no clue what this would be like ,Ymir...what is a chi strike..perhaps we have different understanding of chi??

I know I wouldn't want to get hit by this master's strikes.

http://www.youtube.com/watch?v=LJeOCRV0oF0&feature...

http://www.youtube.com/watch?v=fswM6YOxj7k&feature...

He shows great internal power and rooting technique, he makes the principle of Issen Hisatsu a reality. I don't care if you can bench press 300 lbs or can run several miles in half an hour, if this guys hits you with one of those rooted strikes, you're gonna feel it.

Whats chi and how does it enhance the power of a punch?

I've felt an internal strike by a systema instructor

http://www.youtube.com/watch?v=_Z0_n7tGnK0

http://www.youtube.com/watch?v=FhhWcRGRtOI

http://www.youtube.com/watch?v=ar1yXYOsxQk&feature...

http://www.youtube.com/watch?v=QlfMsZwr8rc&feature...

In what are purely demonstrations, Chi always works. But in every single case of Chi actually being examined under controlled conditions, it's been proven fake. These videos will explain what Chi actually is as well as show that it is not, in fact, real.