Comment by gazpacho

Having only read the abstract... the conclusion makes sense to me. I've operated under the assumption that volume is the most important factor for muscle growth as long as you're lifting something like 1/3 or more of your 1RM. So 12 reps with higher load or 25 reps with lower load are going to be similar volumes (or at least similar enough given the other factors that the two protocols give the same outcome).