A student is investigating changes in respiratory rate during submaximal exercise following an 8-week aerobic training program.
Compare the validity and reliability in the context of this physiological investigation. (4 marks)
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Sample Answer
- Validity in this investigation refers to whether respiratory rate measurements accurately reflect the physiological adaptations to aerobic training.
- Reliability refers to the consistency of measurements across multiple testing sessions.
- High validity would be achieved by ensuring the exercise protocol adequately challenges the respiratory system at appropriate intensities to demonstrate training effects.
- High reliability would be achieved through consistent counting methods and standardised breathing pattern instructions.
- Validity might be compromised if respiratory rate is measured during inappropriate exercise intensities that don’t reflect aerobic adaptations.
- Reliability might be compromised if different counting methods are used pre- and post-training.
- Both validity and reliability are essential yet distinct qualities;
- Valid but unreliable measurements would accurately reflect respiratory adaptations but produce inconsistent results
- While reliable but invalid measurements would yield consistent results that don’t actually represent the training adaptations being studied.
Show Worked Solution
Sample Answer
- Validity in this investigation refers to whether respiratory rate measurements accurately reflect the physiological adaptations to aerobic training.
- Reliability refers to the consistency of measurements across multiple testing sessions.
- High validity would be achieved by ensuring the exercise protocol adequately challenges the respiratory system at appropriate intensities to demonstrate training effects.
- High reliability would be achieved through consistent counting methods and standardised breathing pattern instructions.
- Validity might be compromised if respiratory rate is measured during inappropriate exercise intensities that don’t reflect aerobic adaptations.
- Reliability might be compromised if different counting methods are used pre- and post-training.
- Both validity and reliability are essential yet distinct qualities;
- Valid but unreliable measurements would accurately reflect respiratory adaptations but produce inconsistent results
- While reliable but invalid measurements would yield consistent results that don’t actually represent the training adaptations being studied.