Says my physical therapist.
I hurt my back most recently doing back squats. 135lbs on the bar. That’s nothing for my big elephant legs. It was my third rep of what was going to be 60 reps over 15 minutes as part of an EMOM (Every Minute on the Minute) workout involving box step-ups as well.
I was hurrying to start the reps as the gym was waiting for me to start. I treated the weight too casually. I didn’t brace up. Tighten my core and glutes. Bend that bar.
That’s what you do when you’re going for a one-rep max, you are psychologically and physically braced to do it. You go into it with the right prep. That’s safe. Loosey goosey = not safe.
* I’m sure plenty of people have hurt themselves doing one-rep maxes. I just like the thinking here.