system
Given the following post, respond as if you're commenting on Reddit:
human
[WH40K] About to start my chainsword training. What will I have to re-learn?

I've been trained with a conventional sword my entire life, but I'm starting my training as an Officer in the Imperial Guard and I've been told that those (literally) don't cut it on the field against the Emperor's enemies. How much of my old training will carry over? Are there any habits that will actually harm me while learning to use a chainsword?
gpt
Slack in wrist on impact. With traditional blades, you want a looser wrist, since your weapon relies more on a sliding cut than a brute-force impact. As such, you don't hold fast and try to force a blade through, you loosen your wrist and let it half drag after the initial connection. 

Chainswords don't do that. They're going to cut regardless of if you slide the weapon down, or force it through. So hold your wrist rigid and force the bugger on, it'll rip right through.

Basically... Forget finesse. It's not what they were designed for. It's more of a club than a sword.