Ty from MuscleWiki here! If anyone is interested in knowing how/why we choose different rep ranges and fatigue levels for Men/Woman or wants to understand our choices, let me know.. happy to answer any questions.
I chose a full-body workout for a 52-y/o man (me), intermediate level focusing on muscle gain. The program suggests squats for 3x3-5, bench for 2x3-5, hip thrusts for 3x3-5, chin-ups for 3x4-8 etc. Those seem more like strength building rep ranges to me. Then weirdly, I get deadlifts for 3x6-10, which is odd programming for deadlifts. In total, I have 8 exercises for a total of 24 sets, which seems like it would take me a solid couple of hours to do. It's also massively focused on glutes and hamstrings for some reason, I have squats, hip thrusts, deadlifts and nordic curls in the same workout. That just seems like an unreasonable amount of volume.