Blood Pressure The A ffects of Physical Activity on Blood Pressure Introduction The heart is a muscle that pumps blood into the body ' s organs and tissues. Blood is pumped out of the left side of the heart into the arteries - the blood vessels that carry the blood ' s oxygen and nutrients to your body. As the blood pumps out of the heart and into the arteries, it pushes against the artery walls. Blood pressure is the measurement of the pressure of the blood in the artery. Blood pressure measurements consist of two numbers. The first figure is the systolic pressure and it measures the blood pressure while your heart is contracting, this can be described as the surge of pressure in the arteries as the heart beats and pumps out of the ventricle. The second number is the diastolic pressure, this measures the pressure between heartbeats when the heart is relaxed, it is the lower number in the measurement. The purpose of this investigation will determine the affects of a person ' s blood pressure after aerobic exercises. In this case, aerobic exercise is defined as star jumps performed for a duration of 1 minute, 2 minutes and 3 minutes with 5 minutes of resting time in-between. Blood pressure is measured immediately after each activity. Hypothesis If the intensity of exercise increases, then diastolic and systolic blood pressure will increase. The independent variables Intensity of exercise. The dependent variable The diastolic and systolic blood pressure (mmHG) Constant Variables Location - Performing the activity in the same location (school gym) as temperature can influence blood pressure. Constant Variables Continued Star jumps - Using the same technique and keeping the speed constant for each activity phase (please refer to Appendix 1). Participants - Keeping the same participant to perform the same task repeatedly and changing the time of the activity. Rest time - Allows blood pressure and body temperature to return to normal. Equipment used - Ensuring that the same measuring machine is used to avoid any errors or faults that can occur during the experiment. Materials Appropriate attire to carry out activity Marker and note book Timer Sphygmomanometer, Omron digital blood pressure monitor . Procedure Refer to the Procedures Manual for the correct operation and measurement of blood pressure with the digital sphygmomanometer. (A ppendix 2 ) Refer to the instructions, How to Perform Star Jumps. ( Appendix 1 ) Take the resting blood pressure and record in table Start the timer and perform star jumps for 1 minute and stop after time is up Take the blood pressure immediately after and record in the table Rest for a period of 5 minutes Start the timer and perform star jumps for 2 minutes and stop after time is up Take the blood pressure immediately after and record in the table Rest for a period of 5 minutes Start the timer and perform star jumps for 3 minutes Take the blood pressure immediately after and record in the table Repeat the steps from 1 - 11 for Person B & C Results Table 1. The effect of aerobic exercise intensity on blood pressure (Systolic BP/Diastolic BP (BPM)) *Blood pressure, post activity star-jumps Person Resting BP (mmHG) BP 1 Min* (mmHG) BP 2 Mins* (mmHG) BP 3 Mins* (BPM) A Female, Active, 55kg 130/78 (57) 142/68 (96) 148/123 (142) 153/95 (107) B Male, Semi-Active 60kg 127/88 (80) 139/125 (116) 141/103 (129) 134 /78 (125) C Female, Non-Active, 55kg 105/75 (54) 127/74 (65) 139/95 (63) 126 /73 (113) Figure 1. Graph results of the systolic blood pressure -6349223837 Figure 2. Graph results of the diastolic blood pressure -6349305434 Table 2. The effect of aerobic exercise intensity - blood pressure averages (Systolic BP/Diastolic BP (BPM)) *Blood pressure, post activ7874001973579 Averages Resting BP (mmHG) BP 1 Min* (mmHG) BP 2 Mins* (mmHG) BP 3 Mins* (BPM) (Person A, B & C) 121/80 (64) 136/89 (92) 143/107 (111) 138/82 (115) Averages Resting BP (mmHG) BP 1 Min* (mmHG) BP 2 Mins* (mmHG) BP 3 Mins* (BPM) (Person A, B & C) 121/80 (64) 136/89 (92) 143/107 (111) 138/82 (115) ity star-jumps Figure 3 . Graph Results - The average effect of aerobic exercise intensity