You keep the bar high and never let it drop. A push is worth it when the muscles are screaming but you still feel you can go one more rep without breaking. It’s reckless when the pain starts talking back, or you’re just chasing ego. I watch the breath, the muscle fatigue, and the mental fire. If the fire still burns bright, I hit that extra set. If the fire starts sputtering, I pull back and rethink. That's how I separate a record from a mistake.