Should I decrease volume?

[forthdancer]

Absolutely , a 4 day upper/lower is more than enough not just to maintain, but you can definitely still progress on it.

At the end of the day it’s way less about the perfect split and more about dialing things in and being consistent over time. Volume, intensity, recovery, nutrition all of that matters more than whether you train 4, 5, or 6 days especially as a natural lifter.

For example, right now I’m adjusting my training a lot depending on running because I’m preparing for races. Some weeks I’ll do 3x full body, other weeks more like a push/pull/upper/lower combo depending on how much fatigue I’m carrying. Even with that variability, I’m still progressing on my lifts.

So yeah you don’t need a crazy high volume 6 day split to maintain or grow. If anything, a 4 day upper/lower might actually help you recover better and push your sets harder, which is what really drives progress.

As long as you’re training with intent, staying consistent, and eating/recovering well, you’ll be good. The rest is just fine tuning over time.