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

How Exercise Affects the Body.

Extracts from this document...


Biology Coursework How Exercise Affects the Body Heart rate is the number of heart beats per minute. You can measure it at pulse points on the carotid (neck) and radical (wrist) arteries. Press slightly on the pulse points count the beats for 15 seconds and then multiply it by 4 (15 x 4= 1 minute). Pulse rate is the pumping action of the ventricles of the heart, it is so strong that it can be felt as pulse in the arteries, far away from the heart so therefore pulse is the pressure wave that can be felt corresponding to the heart beat. Resting pulse in an adult is 60 to 80 beats per minute. Here are my results for this investigation. It contains results from two students: Student A- weight 55 kg Time (minutes) No. of Steps per minute First Results beats per minute Second results beats per minute Average Difference between the average b.p.m/ time 0 0 74 78 76 0 1 10 92 90 91 15 2 15 96 98 97 6 3 20 100 102 101 5 4 25 105 108 106.5 5 5 30 125 124 124.5 18 6 35 145 140 142.5 18 7 40 156 151 153.5 11 8 45 165 162 163.5 11 9 50 - 168 168 5 Student B- Weight 62 kg Time(minutes) ...read more.


They were using this as fuel which the body already had. Between the 4/5th minute student A went over the creatine phosphate supply and went into anaerobic respiration which can be seen on the graph, that the heart beats of student A has increased at a faster rate. At the start it was a steady 5-6 beats per minute increase but as it went in to the 4/5th minute the difference started to increase from 5 to 18 which indicates that Student A has gone into anaerobic respiration his heart beat per minute has increased but, towards the 8/9th minute the rate of increase of the heart beat has decreased, which can be seen on the table, from 11 to 5 b.p.m which suggests that student A is now respiring aerobically and the body is repaying the oxygen debt which occurred during anaerobic exercise. However, student B's heart rate is increasing at a steady rate in whole of the experiment. Even though the student B has a steady rate of increase and it went into anaerobic and aerobic respiration just like Student A but, student B only went up to 7 minutes of exercise which suggests that student B is less fitter than the student B. ...read more.


Evaluation: Although I believe this experiment has produced fairly valid results, I am not sure that the information provided was particularly accurate. For instance, I cannot be sure that the step-up exercise was done at the same rate throughout the experiment. Also, I am not sure how many seconds interval rest was taken in between by student A and B and if it was kept exactly to that timing. On the table first result for Student A does not show the b.p.m. at the 9th minute, as he has shown it in the second result column, it does not give me a fair average as I had to divide it by one instead of two. If I were doing this experiment myself I would have to look closely at the method of exercising used by student A and B. I think that exercising on a piece of equipment like a running machine would produce more accurate results because I would be able to guarantee that the exercise remained constant throughout this experiment. Finally, an actual 'pulse-meter' might have helped the experiment to be more accurate. This is simply strapped round the chest of the exercise and it measures your current heart rate. I believe that this would produce a more accurate heart rate and it would not be necessary to have breaks during the exercise. ...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

    Artificial Cardiac Pacemakers

    5 star(s)

    A small battery powered unit, known as a generator and wires that connect the generator to the inner walls of the heart14. Electrical impulses are sent from the generator through the leads to the inner walls of the heart. This causes the heart to contract, just as the natural pacemaker does.

  2. human body system

    Around each alveoli are lots of capillaries and walls are very thin. The oxygen passes through the walls of alveoli into the capillaries and it is then carried in the red blood cells to all parts of the body. The opposite happens with carbon dioxide.

  1. Investigate the nature of heat loss in the human body.

    Body temperature is generally higher than the air temperature, with the exception of tropical conditions. Transfer of heat in the form of infrared rays between a warmer object and a cooler one without physical contact. The body loses heat by radiating more infrared waves than it absorbs from cooler objects.

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

    - While wrapping the machine around the volunteer's hand I ensure it is not too tighly tied because this could injure the volunteer. - I will carry out my experiment under a Doctor's Guidance. Safety Precautions: - While checking the volunteer's weight , shoes will be removed to give accurate reading.

  1. Personal Exercise Programme.

    This process occurs for a number of repetitions and sets. Interval training needs to be carefully planned, as the duration, intensity of work and rest periods need to be carefully matched to the level of fitness of the performing person.

  2. Human biology short notes

    * The donor must be of the same blood group as of the patient * Both the patient and donor must under go surgery * The donor must have similar kidney tissue as the patient Rejection * Rejection is when the body reacts to transplanted tissues (Kidney)

  1. An experiment to investigate the rate of anaerobic respiration of yeast in various respiratory ...

    In order to analyse my results in greater detail, I have drawn a graph for each respiratory substrate, showing the average volume of carbon dioxide produced at each of the time intervals (0, 3, 6, 9 and 12 minutes). This will help me analyse at which time intervals the rate

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

    The heart does not have to pump as many times to deliver fresh blood to your cells, organs and tissues when it is contracting more forcefully. Factors which affect recovery time: Several factors affect heart rate at rest and during exercise.

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