Describe the human body's physiological responses to the increased energy demands of exercise, including changes in heart rate, breathing rate, and breath volume.
Explain how these bodily responses help supply active muscles with more oxygenated blood.
Understand that insufficient oxygen supply during vigorous exercise leads to anaerobic respiration and the subsequent build-up of lactic acid.
Describe the concept of muscle fatigue caused by prolonged periods of vigorous activity.
(HT only) Explain the concept of an oxygen debt as the extra oxygen required post-exercise to react with and remove accumulated lactic acid.
(HT only) Describe the transportation of lactic acid via the bloodstream to the liver, where it is converted back into glucose.
