You load up the bar with like as many 5 or 10lb plates you want.
Do like 12 reps or whatever. Then you have two buddies on each side of the bar that remove a plate from each respective side and you pump out another 12 or whatever and this is repeated until you are left with just the bar. At that point u can barely lift the bar
Did those in HS. Always funny when someone would walk in just as I was doing the bar and struggling
I have no idea if it improves strength, but it sure triggers lactic acid
a burn out to me is about 60% of your max at the end of a exersise for as many reps as you can..
i used to do this all the time for every major compound movement.. then i noticed i got stronger if i did it once and a while.. so i do it about once every 2 months