Energy sources of skeletal muscle during various physical activities, biochemical differences between aerobic and anaerobic exercises

Energy sources of the muscle

• The energy produced by the glycolytic pathway
• Complete oxidation of carbohydrates and lipids

Macroerg phosphate-containing molecules available for physical activity (Anaerobic/Aerobic)

1. ATP
2. Creatine-phosphate

Anaerobic and aerobic energy production pathways (Figure 1)

ATP produced in glycolysis

• Limited by the accumulation of lactate
• It does not require O2
• It cannot be increased significantly by exercise

ATP is produced by

• The electron transport system is proportional to the O2
• Available for oxidation
• It can be increased by exercise

Energy sources of the muscle

Macroerg phosphate-containing molecules available for physical activity (Anaerobic/Aerobic)

Anaerobic and aerobic energy production pathways (Figure 1)

Characteristic biochemical features of anaerobic physical work

Biochemical background of the possible increase of anaerobic performance

Characteristic biochemical features of aerobic physical work

Biochemical background of the possible increase of aerobic performance

VO₂ max

Removal of Lactic Acid following exercise

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