The aim of the experiment is to find the effect of exercise on the heart rate

Hypothesis:

An increase in exercise will increase the heart rate.

Variables:

• Dependent variable: heart rate
• Independent variable: exercise rate (80 jumps for 1 minute with maximum height)
• Controlled variable:

• Temperature (temperature rise will cause the heart rate to increase in order to deliver more blood to the skin, thus blood loses heat.)
• Stress (stress will cause the hormone adrenaline to be released, and any hormone circulating the blood causes the heart rate to increase.)
• Water level in blood (the higher the water level the higher its volume, making it easier for blood to reach an organ with fewer bumps)
• Stimulant drugs
• Hormones

Materials:

• 1x chair
• 1x Handgrip heart monitor
• 1x Stopwatch (+/- 0.02)
• 1x Laptop with software Logger Light v1.5 installed
• 5x Healthy volunteers with same size and age
• Microsoft excel used to note the data

Method:

1. Find 5 volunteers
2. Assign each volunteer a letter (A, B, C, D, E)
3. Ask volunteer A to sit for 1 minute on a chair.
4. Measure and then note the heart rate of volunteer A.
5. Ask volunteer A to jump at a rate of 80 jumps per minute for 1 minute, with the maximum power.
6. Measure and note the heart rate of student A after the exercise.
7. Repeat steps number 1 to 4 for volunteer B, C, D and E.

DATA COLLECTION AND PROCESSING:

Raw data:

Processed data:

Conclusion and evaluation:

Conclusion:

The result supports my hypothesis, and agrees with current knowledge, as it can be seen in the processed data the table shows that the average increases from 82.8 to 150.2 with 67.4 beats per minute difference.

 

Evaluation:

The results that were produced from the experiment matches with the current knowledge.

Source of errors can be the stopwatch or that the volunteers can not be equally motivated.