Response to exercise

• During exercise the human body reacts to the increased demand for energy
• The heart rate, breathing rate and breath volume increase during exercise to supply the muscles with more oxygenated blood
• If insufficient oxygen is supplied, anaerobic respiration takes place in muscles.
• The incomplete oxidation of glucose causes a build up in lactic acid and creates an oxygen debt.
• During long periods of vigorous activity, muscles become fatigued and stop contracting efficiently.
• Blood flowing through the muscles transports the lactic acid to the liver where it’s converted back into glucose.
• Oxygen debt is the amount of extra oxygen the body needs after exercise to react with the accumulated lactic acid and remove it from the cells