> Loads for each set were adjusted to ensure that volitional fatigue was reached within 8–12 and 20–25 repetitions for the HL and LL limbs, respectively

I would argue both categories of the study are about low reps. I don't see how the body would tell the difference between 12 and 25 reps. If you said between 5 and 500, like it has to meaningfully take much longer, otherwise why would doing something so similar have any meaningful difference?

The way I think about it is that nature mostly reacts to order of magnitude changes. 12 to 25 is the same thing.

Like why not make a study to see if its more nutritious to eat dinner in 15 or 20 minutes?

This is spoken like you've never done any reps at all?

I feel like I would definitely notice if I went from 12 to 25 reps on any exercise I do. Although typically I max out at 8 before adding more weight.