Your brain offers one more excuse right when your body could do one more set. Pick the set.

Your mind reaches for an exit slightly before your body needs one. That voice is not a reliable report on capacity, it is a preference for comfort, and it gets loudest right where the useful part of the effort begins. Most of what you came for sits on the far side of the suggestion. Seeing the voice as a habit takes away most of its authority.

Next session, promise yourself one more set before you decide anything, then decide honestly afterward. Some days the real answer will be stop, and that is fine. The point is making the call after the excuse rather than during it.