how do you grip the bar for your dead hang? Wide-grip overhand like a normal pull-up? Or narrow-grip underhand like a chin-up, or both, or something else?

Hi! Overhand like a normal pull-up with a standard grip, hands parallel to shoulders if that makes sense.

Yes it does, thank you! Definitely going to trying this out. Shoulder impingement has been a plague on my lifting

I learnt it from one of those Tiktok Physiotherapist channels. This was some of the benefits I got from Tiktok before I deleted it :)