Describe the immediate physiological responses of the respiratory system during an incremental training session from rest to maximum effort. (5 marks)
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Sample Answer
- At rest before training begins, ventilation rate is relatively low as the body’s oxygen demand is minimal.
- At the onset of low-intensity exercise, both breathing frequency and depth increase to deliver more oxygen to working muscles.
- As training intensity increases to moderate levels, ventilation continues to rise proportionally with exercise intensity to maintain oxygen supply and remove carbon dioxide.
- At higher intensities, ventilation increases more rapidly as the body attempts to remove additional carbon dioxide produced when lactic acid is buffered in the blood.
- At maximum training intensity, ventilation reaches its highest rate as the respiratory system works at its capacity to meet the oxygen demands of high-intensity exercise.
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Sample Answer
- At rest before training begins, ventilation rate is relatively low as the body’s oxygen demand is minimal.
- At the onset of low-intensity exercise, both breathing frequency and depth increase to deliver more oxygen to working muscles.
- As training intensity increases to moderate levels, ventilation continues to rise proportionally with exercise intensity to maintain oxygen supply and remove carbon dioxide.
- At higher intensities, ventilation increases more rapidly as the body attempts to remove additional carbon dioxide produced when lactic acid is buffered in the blood.
- At maximum training intensity, ventilation reaches its highest rate as the respiratory system works at its capacity to meet the oxygen demands of high-intensity exercise.