When you are learning scales on the guitar, it is tempting to play quickly, even if quickly means a sloppy note or two.
But you don’t get better at guitar by playing sloppy scales.
Instead, practice slowly and perfectly now so you can play quickly and perfectly later.
The same principle applies to strength training.
6 repetitions done with intent, are more beneficial than 8 repetitions done with the aim of doing as many reps as possible.
Slow things down.
Bring your full attention to the movement.
Remember that you aren’t here to perform for the other people in the gym. You are here to practice strength.