Im starting to notice a lot of people holding their breath till the end of the extension and then exhaling
then inhaling on the way down instead of exhaling during the extension.

Is it just preference or?

Thoughts?

I was always taught to NEVER hold my breath, hence the question being raised.

How do you manage to stay under water?

for squat/bench/dl, i hold my breath and exhale at the top or start to about half way through the rep.. need to maintain abdominal pressure