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Effect of Physical Activity on Heart Rate | Biology for GCSE/IGCSE - Year 11 PDF Download

Investigating Effect of Physical Activity on Heart Rate

  • It's quite easy to study how exercise impacts the body in a classroom setting.
  • You can determine breathing rate by counting breaths per minute and heart rate by taking a pulse.
  • Both can be recorded before and after an activity, with results plotted on a bar graph. It's crucial to maintain consistency in the duration of measuring breathing and pulse rates, ensuring individuals fully recover before commencing a new activity.
  • Increased physical activity leads to higher heart and breathing rates. Following exercise cessation, the heart rate stays elevated for a while before gradually returning to its resting state.

Key Concepts on Investigating Effect of Physical Activity on Heart Rate

  • Consistency in Measurement Duration: It is crucial to measure breathing rate and pulse rate consistently over time. Individuals should fully recover before commencing a new activity.
  • Impact of Increased Physical Activity: Engaging in more physical activity leads to elevated heart rate and breathing rate. Following the cessation of activity, the heart rate remains elevated for a while before gradually returning to its resting state.

Additional Information

  • Recovery Phase: After physical activity, the heart rate stays elevated for a period, showcasing the body's response to exertion. Subsequently, there is a gradual decline back to the baseline resting heart rate.

Question for Effect of Physical Activity on Heart Rate
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What is the impact of increased physical activity on heart rate and breathing rate?
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FAQs on Effect of Physical Activity on Heart Rate - Biology for GCSE/IGCSE - Year 11

1. How does physical activity affect heart rate?
Ans. Physical activity increases the demand for oxygen in the body, which leads to the heart pumping more blood to deliver oxygen to the muscles. This increase in blood flow results in a higher heart rate.
2. What is the relationship between the intensity of physical activity and heart rate?
Ans. The intensity of physical activity is directly proportional to heart rate. Higher intensity activities require more oxygen, causing the heart to beat faster to meet the increased demand.
3. How quickly does heart rate respond to physical activity?
Ans. Heart rate typically increases rapidly in response to physical activity, especially during activities that require sudden bursts of energy. It can take a few seconds to a few minutes for the heart rate to reach its peak during exercise.
4. How does regular physical activity impact resting heart rate?
Ans. Regular physical activity can lead to a decrease in resting heart rate over time. This is because the heart becomes more efficient at pumping blood, resulting in a lower resting heart rate.
5. Can age and fitness level influence the effect of physical activity on heart rate?
Ans. Yes, age and fitness level can influence how the heart responds to physical activity. Younger individuals and those who are more physically fit may have a lower resting heart rate and a quicker recovery time after exercise compared to older individuals or those who are less fit.
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