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Originally Posted by
Carlos Daniel
I don't know how much weight that is, but when the bar gets heavy, it's hard to expand your thorax with the bar on your back, it's pretty clear when you try to do a set of 20. Those 2-3 breaths you take look funny and are probably not helping you. Just breathe as you would normally breathe when tired then take a big breath and squat.
And spending too much time with the bar on your back doesn't help either. Don't take excessive time to do your set. Take as long as you need, but don't spend half an hour under it.