Hey Athensgym- My body seems to be primarily slow twitch fibers, and I usually stay in the 8-12 rep range. 3-4 sets. I tried and liked 5x5 for its simplicity (and its app), but lower reps did not seem to stimulate a response for me. I pyramid squats, behind neck press, and bench press. Other exercises I just try to increase to 12 reps with a constant weight, then raise the working weight next workout if all three sets were twelve reps. Or if I just feel strong that night, which happens occasionally. Still recovering from last fall's debacle when I tried full body three times a week. Like it or not, my recuperation from a hard workout takes a full week for each muscle group (except abs, which irritate my acid reflux and I do not enjoy training).