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

Effect of exercise on blood pressure.

Extracts from this document...


Effect of exercise on blood pressure. Research The heart is made almost entirely of muscle. It is a hollow organ that pumps blood around the body and is in the centre of the circulatory system. It is divided up into four chambers: Two atria or auricles situated in the upper part of the heart, whose function is to receive blood. Two ventricles, situated in the lower part of the heart whose function is to pump blood. The average heart rate of an adult is around 60-90 bpm (beats per minute) and blood pressure of 120/80, while resting, With each beat pumping 5 ounces of blood, which is approximately 4,000 gallons a day. The heart rests in between beats so it rests more then it works, so in a 70-year lifetime the average human heart works for about 30 years and rests for about 40 years. When we exercise our heart rate increases. This is because our muscles are working harder and need more energy. Our heart rate increases to supply more oxygen, carried in the blood, to these muscles. The oxygen is needed in the muscles for aerobic respiration that is to break down glucose, which we get from food, into glycogen, which is the main type of energy we use when we exercise. This can be shown in the word and symbol equations: Glucose + Oxygen ? Energy + Carbon dioxide + Water C6H12O6 + 6O2 ? ...read more.


- The pace of the person doing the exercises, because this will affect the person's blood pressure. Because our test uses the leg and arm muscles repeatedly, the person must rest between each trial so that all the lactic acid can be carried away. - How long the exercise will go on for, I have decided to make this one-minute. Each exercise must take the same amount of time so that I can compare the blood pressures. So my fixed variables are: keeping the same person, the same time, same positions, the same pace of exercises, and the time of the exercises. I will also repeat the experiment 3 times, which has allowed me to work out an average. Therefore this made the reading more accurate. Method 1) First we thought of which exercises to choose for our subject. We decided to use walking, jogging, start jumps, and step-ups. We then set up all the equipment needed 2) To start with we measured each person's blood pressure in the group to see which individuals blood pressure was nearest 120/80 (average persons blood pressure). This was to ensure we did not get anomalous results. 3) Once we had chosen our subject we measured the persons resting heart rate where there was no strain on the muscles. We decided to sit down while taking our blood pressure. If there were any strain on the muscles this would make our results unreliable because it would increase the blood pressure. ...read more.


When one trial was over, and we would be lying down relaxing so that our heart rate would return to normal, we did not account enough time for the lactic acid in our muscles to be carried away. We would not be able to judge if all traces of lactic acid had indeed been carried from the muscles. As the trial was being carried out the body temperature of the exerciser was rising. The heat of the body would increase the blood pressure, which would adversely affect our results, making them less accurate and reliable. The food consumed by the participating people may have contained different amounts of fats, carbohydrates and lipids. This would affect their available glucose levels during exercise. To improve upon this experiment I would increase the amount of times it is repeated, to give a wider range for the average to be taken from. I would make the experiment longer to be able to see if the blood pressure will actually level out and at which point. I could have also carried out all the experiments in the same day, because the breakfast etc. may have changed throughout each day. However, this was difficult to do because we only had a lesson to carry out the exercises. Further experiments I could carry out within my aim could involve exercising different muscle groups of the body. This could show which muscles need the most amount of blood supply. I could also try different intensities of the exercise carried out, by doing them for longer. ?? ?? ?? ?? Sarah Dawson 11V4 ...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

    Investigate the effect of altitude training on the density of blood.

    4 star(s)

    Glycolysis itself does not require oxygen and can proceed aerobically or anaerobically. Glycolysis can generally be divided into two main phases. During the first phase, phosphate is added to the glucose molecule, known as phosphorylation. The glucose molecule is now split into two three-carbon molecules.

  2. Should the cloning of humans be allowed?

    be taken since the outcome of one being successfully cloned and born is very low. Women donors being given fertility drugs to produce eggs would be putting themselves in a painful procedure which would also be likely to have danger in the long term.

  1. How Ultrasound Works.

    look at the organ being examined and is best used for: * Early detection of cancerous and benign tumors ? examining the prostate gland for early detection of tumors ? looking for masses in the colon and rectum ? detecting breast lesions for possible biopsies * Visualizing a fetus to

  2. My aim is to investigate the effect of different amounts of a full body ...

    * Record and note resting pulse rate. * Reset stopwatch. * Begin doing the exercise, start the stopwatch when exercise started. * Do exercise for the time needed. * Immediately after stopping exercise, record pulse rate for 30 seconds. * Double pulse rate to get beats per minute.

  1. Ideal Position to Recover Resting Heart Rate- Lab. Does the physical positioning of ...

    After looking at the data in both the different genders and age groups, it can be said that, without a doubt, the physical positioning of the body after exercise DOES affect the time it takes to recover to the RHR.

  2. Analyse and evaluate the effect of exercise on the ECG trace

    It is also electrically neutral. (Rowell and Shepherd 1997) Fig3 - The PQRST wave and the timings between components adopted from (Sherwood 1998) By counting the number of PQRST complexes per unit time, you can determine the rate of heart contraction, by measuring internal differences in the timing of the ECG.

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

    Preferably left ring finger tip. Wait for one minute for alcohol to dry otherwise alcohol may get mixed with blood and will effect my reading. Step2 - Load the laucet with the needle and keep ready by pulling the sliding knob backwards.

  2. The aim of my investigation is to measure the effects of BMI (body mass ...

    reason for doing this is because the resting heart rate will eventually start to decrease after a longer time period and would therefore not represent the true value. I will take the recording three times to get a consistent final result.

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