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Effect of exercise on heart rate and arterial blood pressure in young healthy volunteers.

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Introduction

59228 Physiological Basis of Drug Action II |Lab Report Effect of exercise on heart rate and arterial blood pressure in young healthy volunteers. **** **** ? 200636232 Effect of exercise on heart rate and arterial blood pressure in young healthy volunteers. Abstract Background and purpose: The aim of this experiment was to test the effect of mild exercise on heart rate, systolic blood pressure and diastolic blood pressure in young healthy adults. It was hypothesised that heart rate, systolic blood pressure and diastolic blood pressure would increase as it was already known that heart rate increased, pumping more blood throughout the body. It was suggested that the body's requirement for oxygen would cause all 3 values to increase. Experimental approach: Six healthy students had their heart rate and blood pressures read, and then each cycled at a steady pace for 5 minutes. The heart rate and blood pressures were measured immediately after this mild exercise session, and taken again after a 10 minute recovery period. Key results: It was found that heart rate increased dramatically between the rest state and immediately after exercise. After 10 minutes, it had decreased to around the same as the rest state. ...read more.

Middle

Immediately after this session, heart rate and systolic and diastolic blood pressure were measured and recorded again, using the same monitoring equipment. This task was carried out as quickly as possible after the cycling session as heart rate and blood pressure starts to fall immediately. A 10 minute resting period followed the cycling session as this was agreed to be sufficient time for the heart rate and blood pressure to stabilise. During the resting period, the subject was required to sit down in a relaxed manner and avoid as much exertion as possible. The data gathered during this experiment was statistically analysed using a statistical software program. The means of each set of results were calculated, as were the standard errors of the means. A series of paired T-tests were then carried out using various sets of results. The significance of these T-tests are explained in the results section. Results Heart Rate The mean resting heart rate in the human subjects was 89.17�3.89 beats per minute (n=6). After a period of 5 minutes on an exercise bike, the mean heart rate increased to 127�7.78 beats per minute (n=6), and increase of ~42% (P<0.005) ...read more.

Conclusion

and gender (only two male students). These variable factors were not accounted for within this study, and thus variations in results between different groups wouldn't be apparent in the results, even if there were significant differences between such variables. Ethnicity is a known factor in certain blood pressure levels. 20% of Caucasian people develop high blood pressure at some point in their lives [6], whereas Asian populations have the lowest risk, with only 9.5% of men and 8.5% of women developing high blood pressure at some point in their lifetime [6]. A higher number of subjects should have been used in this study, preferably from a wider demographic, as this would have made the results more reliable and representative of the population. A slightly longer rest period could have been used after the exercise session as although the heart rate and blood pressure had returned to within the standard error range, the mean was still a little higher than at resting state. The investigation, if time had permitted, could have been carried out several times throughout the week, again, making the results more reliable. If only data gathered near the end of the week, it could dismiss any possible alterations that could have occurred due to stress or anxiety (anxiety is known to cause short, sharp spikes in blood pressure [7]). ...read more.

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