Outline the relationship between exercise intensity and lactate levels during training. (4 marks)
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Sample Answer
- Lactate levels remain relatively stable during low-intensity exercise as the aerobic system can meet energy demands without significant lactate production
- As exercise intensity increases, the body begins to produce more lactate as the glycolytic energy system becomes more active
- At the lactate threshold, production of lactate exceeds the body’s ability to remove it, causing a sharp rise in blood lactate concentration
- During high-intensity exercise, lactate levels continue to rise significantly, contributing to muscle fatigue and limiting performance duration
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Sample Answer
- Lactate levels remain relatively stable during low-intensity exercise as the aerobic system can meet energy demands without significant lactate production
- As exercise intensity increases, the body begins to produce more lactate as the glycolytic energy system becomes more active
- At the lactate threshold, production of lactate exceeds the body’s ability to remove it, causing a sharp rise in blood lactate concentration
- During high-intensity exercise, lactate levels continue to rise significantly, contributing to muscle fatigue and limiting performance duration