Low volume, low reps doesn’t work for my body. I’d say that probably works great for guys with a lot of fast twitch muscle fibers. I have predominantly slow twitch fibers so I do more volume, more reps.
I typically do 16-20 sets, 8-16 reps per set for chest, back, and delts. For biceps and triceps I do 12-16 sets, 12-16 reps with lots of giant sets and super sets.
For legs my knees are shot and I have permanent nerve damage to my left leg so I only do 8 sets quads, 4 sets hams, 8 sets glutes, 6 sets calves. Reps are 13-16. I train one body part per workout, and train 2 days on, 1 off.
Dr andy halpin would disagree with you. Without muscle biopsies you really dont know your fiber types