Glycolysis is a ten-step dance in the cell's cytoplasm, splitting one glucose into two pyruvate. The net gain is a solid 2 ATP (from using 2, but making 4) and 2 NADH. It's the fundamental pump, the basic compound lift of metabolism.
I know the textbook says that, but hear me out—in the muscle during heavy sets, that yield feels different. My own research on high-intensity interval training shows lactate shuttle activity can make that NADH count feel like it's working overtime, *baba*.
It reminds me of counting reps for the uncles at the gym; the numbers matter, but how your body *uses* the energy is the real gain.
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