• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

How does Exercise affect the pulse rate

Extracts from this document...


Nazneen Rajabali How does Exercise affect the pulse rate? What is the pulse? The pulse is felt by the beating of the heart or blood vessel. The pulse is specially felt when a finger is put on top of an artery. In an artery, the pulse is felt when the artery expands and contracts. The walls of the artery are made up of elastic walls. The contracting of the heart muscles forces blood into your arteries and because the walls of the arteries are elastic they can take this pressure. They expand and contract as the blood is pushed through and this is what is felt as your pulse. To feel your pulse you need to find a main artery in your body. The most common place to find a pulse is on your wrist or the side of your neck. The resting pulse of an average human is 70 beats per minute. However, during exercise the rate my increase to 200 beats per minute. Prediction I predict that by increasing the amount of exercise I do, my pulse rate will also increase. I have researched and used my scientific knowledge to predict this. ...read more.


Blood gets pushed to the parts of the body that is needed the most and less where it is not needed. For example, during exercise more blood is needed from the guts to the legs. To make this happen blood vessels widen and constricts at different points. This is called, vasodilatation and vasoconstriction. During exercise or when playing sport the increased respiration in the muscles generates more heat and therefore the blood gets hotter. To cool the body down more blood is pushed close to the skin. This makes the persons skin red. Lastly, the body also sweats a lot which cools the body by evaporation. Immediately after exercise, the pulse will still be higher than normal, because the muscle may have used more energy than the blood could supply in the form of oxygen and glucose. The muscle will have to repay this "oxygen debt" by taking in more blood than normal for a time. Equipment To do my experiment I will be using a stopwatch. I need to use a stopwatch to record how long I have been walking and then to test my pulse per minute. ...read more.


Results Here is a table of my results: The table of results show that the longer you exercise the higher your pulse rate goes up. As the muscles started to work harder respiration was taking place in the body to provide extra energy for the muscle fibers. Breathing also increased to remove the carbon dioxide and consequently the heart started to beat faster pumping the blood faster around the body. The increased respiration in the muscles generated more heat and therefore the blood got hotter. As the pulse rate went higher the arterioles widened so that the blood pressure wouldn't get to high. In conclusion, the evidence gathered which is shown in the table above shows that my prediction is to be true. I predicted that my pulse rate would increase as I exercised more. The outcome of this experiment met all the criteria's for a reliable result. However, this result would have been very different if one or more key variables were not met. For example, if the person was overweight, asthmatic, under medication or even pregnant. Additional further work could be provided if the researcher wanted to predict whether pulse rate affected when one or more key variable was used. ?? ?? ?? ?? ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Humans as Organisms section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Humans as Organisms essays

  1. Marked by a teacher

    Design an Experiment to show how exercise can affect Heart Rate in Humans.

    4 star(s)

    Using an electronic heart monitor would evade any possibility of human error or limitation. By also looking at the table of results, a considerable deviation in heart rate between the replicates of different people is noticed and this would decrease the reliability of the experiment.

  2. How does strenuous exercise affect your pulse rate and breathing?

    Anaerobic respiration occurs when muscle cells do not receive enough oxygen to produce the energy the energy needed. This occurs during vigorous exercises. The heart can't pump enough oxygenated blood to the muscles when they become exhausted. The heart rate increases in an attempt to send more oxygen to the muscles but when it fails anaerobic respiration takes place.

  1. How does exercise affect pulse rate?

    needs to beat faster to get the oxygen and glucose to the muscle cells where it is needed, so that respiration can take place. You then need to breathe at a more rapid rate to provide more oxygen (breathing is the only way to get more oxygen), so that it

  2. Effects of Exercise on Blood Sugar Level and Pulse Rate.

    is relaxed The diaphragm can be lowered further, increasing the amount of air inhaled at each breath making more oxygen available for the oxidation of glucose. Glycogen in the liver converted to glucose Increases blood sugar level, making more glucose available for oxidation Heart Rate Increased Increases the rate at

  1. Drugs in Sport

    Just like every other cell, the red blood cells need time to mature after dividing, and they mature while floating in the blood. This is the easiest way to detect if an athlete has been using EPO to enhance performance.

  2. Find out the effects of the Common Cold on the pulse rate after exercise, ...

    it had when you were less fit and it was not so strong. Blood is always being pumped around your body by your heart. 'At rest', your heart has a 'resting heart rate'. Whenever you do vigorous exercise, your working muscles need a greater supply of oxygen than they do when 'at rest'.

  1. Investigate the theory that when you exercise the more weight you carry the more ...

    and measure it for 1 minute. Record this on some paper. 2. Get your stopwatch and time yourself doing the step-ups for 1 minute with no weight. 3. Record the result and keep it in a safe place. 4. Have a minute rest to get your pulse rate roughly back to its resting rate.

  2. How does exercise affect the pulse rate?

    During a heartbeat, the atrium contracts, and forces blood into the ventricle. The ventricle contracts a split-second later, forcing blood out of the heart and into the arteries. The right side of the heart pumps blood from the body to the lungs.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work