Every hydrogen molecule consolidates with an atom of NAD shaping two atoms of NADH.
Every molecule of NADH gives a hydrogen atom to a pyruvate atom, and consequently is oxidized, recovering the two atoms of (oxidized) NAD which permits glycolysis to proceed.
Each pyruvate particle is diminished to lactate, which structures lactic corrosive in the arrangement.
As this cycle proceeds, there is a development of lactic acid which hinders the proteins engaged with the different phases of glycolysis so anaerobic glycolysis can't proceed.
As anaerobic respiration can never proceed, ATP is not generally created, so it doesn't tie to the thick myosin fiber accordingly myosin-actin cross scaffolds become fixed, prompting muscle cramps.