The cytosol of muscle cells ferment glucose. Scientist from the past called this sugar fermentation. Today it’s called glycolysis.
I think ‘sugar fermentation’ is a better term – for practical educational purposes – because it refers to the process of what happens to what most people already recognize, specifically food and sugar.
Glucose is the body’s simply sugar. High intensity exercise, which is anaerobic exercise, is powered by fermentation of glucose.
Fermentation is EXACTLY same process that occurs in the colon and mostly latter section of your small intestine. Bacteria, or gut flora ferment certain types of sugars into a variety of other important food stuff-products or nutrients, e.g. acetic acid, butyric acid, and propionic acid.
Hence, the cytosol of a muscle cell may be called the ‘bacterial section’ of the cell, because it ferments sugar like bacteria and yeast do.
Some peoples’ gut bacteria may even produce too much alcohol from fermentation, which means something may be wrong in their gut.
Aerobic exercise (exercise that uses oxygen) is not a fermentation process; it is a combustion like process: Fuel + O2 makes CO2 + Heat + H2O.