If you click through to the study, they say they tested endurance too (at 50% 1RM). It may be that one set is insufficient to build endurance at higher loads (s

If you click through to the study, they say they tested endurance too (at 50% 1RM). It may be that one set is insufficient to build endurance at higher loads (say 80% 1RM), but not clear. The biggest difference between 1, 3 and 5 sets was muscle hypertrophy (which increased with the number of sets). A lot of "strength" training has hypertrophy as an unstated goal, which makes sense if you're training for the football team, but less so if you're just training for life.