CheukMo
Orange Belt
There may be no tension, but the triceps have to either move or break. But I do understand what you mean by using no tension in a WC punch and you're right.Fold one of your arms so that your finger tips are touching the top of that same shoulder(colapse your own arm at the elbow). Now swing your elbow from the downward resting position, forward until it points away from you. You should maintain the forward going triangle when doing this. See how it swings with no use of the tri-cep? this is the natural motion of the arm. Now do that same motion with you fist out in front of it. Still no tension
The way the punches are taught where I train, there is very little elbow movement but there is a great amount of movement at the fist. We launch our punches like an arrow leaving a bow.
That's the immovable elbow principle. (Not saying you didn't already know that)