Energy
pyruvic acid
Energy
During gentle or moderate exercise, the products of cellular respiration of glucose are carbon dioxide and water (CO2 + H2O), just as in other cells.But if the exercise is vigorous, the muscle cells can switch to anaerobic cellular respiration (fermentation), in which case they convert each molecule of glucose into two of lactic acid.Later, most of the lactic acid is converted back to glucose.
Actually glucose is what sugar turns in to during glycolysis.
During exercise, the body requires a quick and readily available source of energy to fuel muscle activity. Glycogen, a stored form of glucose in the liver and muscles, is converted back into glucose to meet this demand. This process provides a rapid release of glucose into the bloodstream, ensuring that muscles have the necessary energy to sustain physical activity. Additionally, converting glycogen to glucose helps maintain blood sugar levels during prolonged or intense exercise.
lactate and glucose between the muscle and liver. During intense exercise, skeletal muscles produce lactate, which is sent to the liver to be converted back into glucose through gluconeogenesis. This glucose is then transported back to the muscles for energy production.
Glycerol is primarily converted to glucose in the liver. It undergoes a process called gluconeogenesis, where glycerol is transformed into glucose to help maintain blood sugar levels, especially during periods of fasting or strenuous exercise. This conversion takes place in the cytoplasm of liver cells.
During energy production without oxygen, glucose is converted into lactic acid through a process called anaerobic glycolysis. This occurs in muscle cells during intense exercise when oxygen supply is limited.
Glucose is converted into lactate during intense exercise when oxygen supply is limited. This process, called anaerobic glycolysis, helps produce energy quickly. Lactate can be used as a fuel source by muscles and other tissues, and can also be converted back into glucose in the liver.
Glycogen is a long branched chain of glucose so when catabolized it will be converted to glucose.
Glucose
Glucose can be used immediately as fuel, or can be sent to the liver and muscles and stored as glycogen. During exercise, muscle glycogen is converted back into glucose, which only the muscle fibers can use as fuel.