blacking out

[Swervyn-Ervyn]

Use to on clean and jerk, sometimes from not flaring last to lift back off windpipe, but a couple of times from holding breathe, sometimes you will go 15-20 seconds holding your breathe, then when you breathe out, the exertion causes a big rush to your head.. Its not the best feeling

 

[Goosey]

I see stars (more like white dots) around my vision when I do EZ bar curls, thought I was holding my breath, but focused on breathing next set and it still happened.
The grip may the the answer here.

Yeah, and I'm interested to know whether more here experience this, just using the leg extension as an example where there are handles to grip, squeeze the handles real tight and see if you can complete or improve the set and report what you feel, I think more often than not the performance of an exercise is due to this.