This isn’t true in the deadlift. That very first rep - the first time you struggle to break the weight off the floor - that is the actual opportunity for this so-called calibration. As a result, there are two activities going on in the first rep - you are getting a sense of the bar’s weight while at the same time completing a rep.
By the time you get to the second rep, you know - whether consciously or subconsciously - how hard you have to pull, and as it turns out, this helps quite a bit.
How Can You Use This Phenomenon to Your Advantage?
Get the first rep.
No, it’s not complicated or sexy, but it’s crucial. Don’t think about whether or not you’ll get all five reps. Don’t think about how tough the set is going to be. You know that - as long as you complete the first rep - the second rep will be easier, so . . .