Heavy weight boxing champion Jack Dempsy is one of those legendary old school boxers whose name is still talked about with reverence. He fought in the 1920s, when cars still looked like Chitty Chitty Bang Bang, Jazz was just becoming popular and the BBC started broadcasting public radio.

He wrote a book on boxing that is still regarded as a classic, Championship Fighting: Explosive Punching and Aggressive Defense and also co-authored How to fight tough.

A new video has been released showing him in full colour. One thing I always notice about Dempsy is his head and neck alignment. He’s always “pressing up the head top” as it says in the Tai Chi Classics. His neck is kept extended and (crucially) aligned with the direction of his spine, so that his chin doesn’t stick out. I think this is one of the keys to his legendary power. Have a watch: