How to force muscle growth when you train:
You need to find the pain & stay in it
The first step is actively building the skill of having a good mental connection to your muscles. I’m limb dominant, it’s harder for me to grow my chest & back. When I realized I don’t naturally connect well to these muscles I started passively flexing them a lot just trying to contract my pecs or lats as hard as possible so I could translate that to the gym. No I don’t mean “walk around flaring your lats.” Just work on being able to activate them at will. Grease the groove type thing
Like I said the next step is translating this mental connection to the gym & trying to keep it established throughout every set. Put the tension on the muscle from the very first rep, before you even begin the set, & focus hard on not losing it. When you feel that pain right in the target muscle, stay in it. Maintain that feeling until you know you’re getting close to not being able to do more reps, & then make your eccentrics excruciatingly slow.
One good example of this that comes to the top of my head is rear delt training. Nowadays it’s easier for me to find the mental connection but in the past it was harder. So I’d lay chest down on a bench & start doing rear delt flies with light weight. Would initially feel nothing because I couldn’t activate them at will, but after doing a bunch of reps I’d start to feel some burning in my rear delts & upper back. That’s the cue to lock in on the burning in your rear delts, stay in it the best you can, & finish off the set.