Automated workout split builder optimizing frequency vs volume for small muscles

You don't need dedicated arm days. Your biceps and triceps are SMALL muscles that are highly prone to muscle damage. Blasting them with volume creates damage that takes days to repair, preventing you from training them frequently enough to actually grow. Here's a better approach: 2 sets each at the end of upper body days, 2x per week = 4 weekly sets with higher frequency, less damage, more growth signal. You don't need an arm day. You need to stop destroying your arms with junk volume.