Doing extra just to prove you can is ego, not discipline. The plan doesn’t need your pride.

Extra reps you add to prove a point are about being seen, including by yourself, and that is a different engine than discipline. Discipline is doing the amount that was planned, especially when the planned amount feels unimpressive. The show version burns out because it needs a reaction to keep running.

Notice the moment you want to add more and ask who the extra is for. If the honest answer is an audience, do what the plan said and stop there. Boring consistency beats a spike you cannot repeat on Thursday.