Yes, but there’s more to it than that. A lot of guys tend to overestimate the weight they can lift, then proceed to lift it badly. Conversely, a lot of women tend to underestimate the weight they can lift. YOU underestimating the weights you can lift is honestly a good thing as it will save you from the failures of ego lifting.
I had a much longer response typed out, then realized that everything I was going to say had already been said (and in better words).
I’m going to quote Paul Carter from an article of his:
- Pick a weight you can do 8 reps with.
- Next week, try to do more than 8 reps with it.
- When you can do 12 reps with it, add weight until you’re back at 8 reps.
- Repeat until big and strong.
This doesn’t apply to your 5x5 lifts, and likely won’t work well for long with your power lifts, but it is a good reference point that most programs are in line with.