Separate if you want to but get over it!

It's an age old debate: Whole body or split body, routines, how to best split the body up, work this with that, blah, blah, blah.

Here are some thoughts on this:

It all works if you can train hard enough with real exercises progressively. Do what allows you to put the most energy into the things you want to improve on the most and allows you to recover the best. All training is in some way systemic, so even if you split it up, if your training hard enough you're still training, "the body."

If you pull to your limit, even if the primary movers are the upper back and biceps, the shoulders and triceps will still get worked. Press hard enough and the bis and lats get it too. Squats and deadlifts hit it all anyway. Even light exercises like high-rep swings hit way more muscle than just the ones that imitate the movement. Stop worrying about and certainly believing that training even small stuff isn't training the whole body. In fact move the combinations around so that you're prepared for the realities of the world out side the gym. Concentrate on the heavy lifts you want to improve first and then mix it up. Life is unpredictable, throw just a little in to be prepared.

Stop worrying, make progress, have fun, train and live with fullness.