A student wants to investigate the relationship between heart rate and blood pressure responses during a 20-minute aerobic training session. Analyse suitable methods for collecting this data and explain potential challenges they might face. (8 marks)
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Sample Answer
Overview Statement
- Investigating heart rate and blood pressure during aerobic training involves comparing continuous versus interval measurement methods.
- These methods differ in accuracy and practical challenges during exercise sessions.
Method 1: Heart Rate Monitoring
- Heart rate monitors provide continuous data collection throughout the entire 20-minute aerobic session without interruption.
- Continuous monitoring enables uninterrupted cardiovascular tracking that connects to real-time exercise responses without stopping physical activity.
- The relationship between continuous monitoring and exercise intensity means accurate heart rate patterns and recovery phases can be recorded.
- Data collection results in comprehensive cardiovascular information but creates challenges with equipment positioning, battery life, and signal interference during vigorous movement.
- However, this leads to potential skin irritation issues and requires proper chest strap fitting for accurate readings.
Method 2: Blood Pressure Measurement
- Digital blood pressure cuffs require exercise interruption at regular intervals to obtain accurate systolic and diastolic readings.
- Measurement gaps create interruptions that affect continuous data collection and may alter natural exercise responses during the session.
- The interaction between exercise stoppage and blood pressure readings leads to potential recovery effects and cooling between measurements.
- Equipment setup generates practical challenges including timing coordination, participant positioning difficulties, and cuff size variations.
- Therefore timing becomes critical to balance data collection needs with maintaining exercise intensity levels.
Implications and Challenges
- The significance is that combining both methods reveals important cardiovascular relationships but creates coordination, timing, and accuracy challenges.
- Students must balance comprehensive data quality with practical measurement limitations using accessible school equipment and proper technique.
Show Worked Solution
Sample Answer
Overview Statement
- Investigating heart rate and blood pressure during aerobic training involves comparing continuous versus interval measurement methods.
- These methods differ in accuracy and practical challenges during exercise sessions.
Method 1: Heart Rate Monitoring
- Heart rate monitors provide continuous data collection throughout the entire 20-minute aerobic session without interruption.
- Continuous monitoring enables uninterrupted cardiovascular tracking that connects to real-time exercise responses without stopping physical activity.
- The relationship between continuous monitoring and exercise intensity means accurate heart rate patterns and recovery phases can be recorded.
- Data collection results in comprehensive cardiovascular information but creates challenges with equipment positioning, battery life, and signal interference during vigorous movement.
- However, this leads to potential skin irritation issues and requires proper chest strap fitting for accurate readings.
Method 2: Blood Pressure Measurement
- Digital blood pressure cuffs require exercise interruption at regular intervals to obtain accurate systolic and diastolic readings.
- Measurement gaps create interruptions that affect continuous data collection and may alter natural exercise responses during the session.
- The interaction between exercise stoppage and blood pressure readings leads to potential recovery effects and cooling between measurements.
- Equipment setup generates practical challenges including timing coordination, participant positioning difficulties, and cuff size variations.
- Therefore timing becomes critical to balance data collection needs with maintaining exercise intensity levels.
Implications and Challenges
- The significance is that combining both methods reveals important cardiovascular relationships but creates coordination, timing, and accuracy challenges.
- Students must balance comprehensive data quality with practical measurement limitations using accessible school equipment and proper technique.