• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month
Page
1. 1
1
2. 2
2
3. 3
3
4. 4
4
5. 5
5

# Investigating the effect of exercise on the heart rate and recovery time.

Extracts from this document...

Introduction

Investigating the effect of exercise on the heart rate and recovery time. There are different factors that affect the heart rate, they are the variables.... I have decided to go for distance run for our variable. I decided that the variables such as fitness and individual involved would be too hard to measure fairly. METHOD As I decided to use distance run as my variable and I am going to use Mark as my 'Guinea Pig', so I am going to make Mark run 20 meters, 40 meters, 60 meters, 80 meters and 100 meters. I am going to change the distance run 5 times. I am going to record his resting heart rate, his heart rate straight after exercise and time how long it takes for him to recover. To make sure that my results are reliable and correct. I am going to take the average of these two sets of results and use the average for my graph and my final result. For this experiment I am going to use... * A heart rate monitor, to measure Marks heart rate - this consists of a belt and a transmitter belt. The belt is moistened so it can read the heart rate easier, then it is placed around the chest. ...read more.

Middle

The body also produces chemical hormones, such as adrenaline, which can change the heart rate. When we are excited, scared, or anxious our heart gets a signal to beat faster. During a fever, the heart beats faster to bring more blood to the surface of the body to release heat and cool the body. The heart rate increases during and after a meal to send more blood to the digestive system. A trained athlete's heart can pump more blood with each beat so his or her heart rate is slower. Likewise, an athlete's recovery time is shorter.'' But when Mark has stopped working his heart rate will still be high because he will need to pay back the oxygen debt. This is because at some points when he is exercising he will respire without oxygen; this is called anaerobic respiration, because he may not take in enough oxygen for aerobic respiration. So when Mark has stopped working he has to ''pay back'' his oxygen debt in order to break down the lactic acid, which is the incomplete break down of glucose. Lactic acid causes cramp in the muscles. The word equation for this reaction is... GLUCOSE ENERGY + LACTIC ACID The further he runs the longer it will take for his heart rate to return to normal because he would have had to work for longer so his oxygen debt would be greater. ...read more.

Conclusion

Lactic acid causes cramp in the muscles. The word equation for this reaction is... GLUCOSE ENERGY + LACTIC ACID The further you run the longer it will take for your heart rate to return to normal because you will have had to work for longer so your oxygen debt would be greater. EVALUATION I used mark as my 'guinea pig' and I made him run different distances 20, 40, 60, 80 and 100 meters) changing the distance 5 times. I recorded his heart rate straight after exercise and resting heart rate, so I knew when his heart rate had returned to normal, and how long it took him to recovery took the average of 2 sets of results. To make sure my results were accurate I used a heart rate monitor instead of finding out the heart rate manually. I used a stopwatch to record the recovery time and a tape measure to record the distance. On each graph there was one odd result this may have been a wrong recording or a fluke. I think that the experiment was a success and the results were reliable but to improve the final results we could take a few more results and get a more accurate average result. I think the results that I collected are sufficient to support a firm conclusion. To extend the enquiry I could experiment how different types of exercise effects the heart rate. Harriet collett ...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

## Here's what a teacher thought of this essay

3 star(s)

This investigation into the effect of changing the running distance on heart rate and recovery time is a competent piece of GCSE work which reflects a good understanding of basic exercise physiology. The writer presents a clear account of the theory, method and results.

It could certainly have been improved in the following ways:

[1] Use of standard scientific terminology when discussing variables (independent, dependent, controlled);

[2] A more detailed discussion of controlled variables including some indication of how the subject would rest between trials;

[3] A more detailed analysis of the data with references to specific results to support the conclusions made.

Overall, 3 stars.

Marked by teacher Ross Robertson 24/04/2013

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

# Related GCSE Humans as Organisms essays

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

4 star(s)

Therefore, more oxygen was needed for more respiration to take place. The only way that muscles are supplied with oxygen is through the blood and as a result an increased blood flow was needed and to do this, the heart had to pump the blood more quickly to the muscles and so had to beat faster.

2. ## How Does Lifestyle Affect the Circulatory System?

3 star(s)

Smoking not only gives people problems in their respirtory system but also causes tar to build up in ateries which again makes it hard for the heart to pump blood around the body.

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

to break which will take longer, resulting in a slower rate of respiration. It is difficult to tell whether yeast will use lactose as a respiratory substrate as it is known that the type of yeast used in this experiment does not have the enzymes required to metabolise Galactose, which is a constituent sugar of Lactose.

2. ## Human biology short notes

* Pushes the bolus forward * Along the whole length of the alimentary canal Digestion in the Mouth *Mechanical Digestion * Food is broken down up by the help of the teeth * Chopping is carried out by incisors and canines * Grinding is carried out by pre-molars and molars

1. ## To investigate how the heart rate and breathing rate increase with exercise.Scientific KnowledgeAerobic respiration ...

* Body exercises * Muscles respire more * Carbon dioxide level in blood increases * Chemoreceptors in aorta (near heart) and carotid body (in neck) monitor carbon dioxide level * Nerve fibres * Medulla oblongata (responds to changes in carbon dioxide level)

2. ## How does exercise affect your heart rate?

Equipment: Stopwatch, sport shoes. Method: I am going to carry out three different movement exercises, walking, jogging and running. The heart rate will be taken by feeling the pulse in the wrist. Here is the procedure of the experiment: * The resting pulse will be taken and recorded.

1. ## The effect of temperature on insect respiration rates

This increase was hypothesised as a rise in temperature provides enzymes kinetic energy to metabolise at a faster rate so use up oxygen up more quickly, the oxygen used up does not cause an increase in breathing rate as the locust is only sensitive to carbon dioxide levels.

2. ## Experiment to Investigate Factors Affecting the Rate of Respiration in Yeast

These were 20?C, 40?C and 60?C. Obviously, the higher the temperature, the longer the settling time was. The average settling time was about 3 and half minutes. I chose to keep this constant throughout the experiment, as much as I could, and to add cool water to the higher temperature experiments in case this settling time was too short.

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