I have had some spotters telling me that I'm not breathing through my reps and that it's not only dangerous, but ineffectual.
Since they have mentioned it I have noticed they're right but I seem stronger and more stable in the bench and squat while holding my breath until near the end of a rep. Then I exhale smoothly, suck in another lung full or air and hold it through all the eccentric and most of the concentric again.
I don't see anything in the archives which recommends breathing habits during a lift. I generally breathe through a set when it is not near a max attempt but when I go heavy I always seem to hold it. Anyone have some knowledge on the subject???