ASSIGNMENT

Effects of Exercise on Heart Rate and Blood Pressure

Effects of Exercise on Heart Rate and Blood Pressure

Introduction

For the purpose of the assignment, we shall conduct a practical study on the issue of the effects of exercise. The paper highlights the practical experiment to show the effects of exercise of the heart rate, blood pressure and pulse of the subjects. To begin the assignment we shall start with the general effects and causes of changes in the aforementioned variables. The paper begins with background information on the subject which would then be followed by the details of the experiment.

Effects of exercise

Effects on cardiac output

This flow increases during exercise, in order to meet the increased demand for oxygen and removal of metabolic waste.

This flow is at rest on average 4 to 5 liters per minute. During exercise this can increase throughput up to 20 to 30 liters per minute even up to 40 liters per minute. The power of exercise is related to oxygen consumption. Cardiac output depends on heart rate and stroke volume. Stroke volume increases very rapidly with the intensity of exercise. Effect on the duration of the movement. Example: injection in the arm with a fluorescent substance. At rest the passage of the right arm left arm is 21 seconds. If the subject performs an exercise of 50 watts, the duration is 15 sec. With 130 watts of exercise: 10 seconds and 200 watts: 8.5 seconds.

Effects on heart rate

The resting heart rate: unstable values

Accelerating pace since the beginning of the year, then stability of heart rate during exercise, the value of the plateau as a function of power. Heart rate is linearly related to the exercise of power to the plateau = max heart rate. Recovery time is different according to the power of work: This increase in heart rate is at the beginning of the year. It is not due to chemical modification of the blood. Only neural mechanisms may be involved as quickly. There will be impulses from the cortex of certain subcortical formations and this will cause an inhibition of parasympathetic activity and increased activity of the sympathetic. This implies an increased release of norepinephrine at the synapses of the sympathetic system. There is also an excitation of the adrenal glands. The problem of increased venous return during exercise is due to greater muscle contraction this implies a greater venous return with an intrinsic relationship to the heart.

Effect on blood pressure

Blood pressure increases linearly with the power of the exercise. An exercise carried out with the arms increases the pressure faster.

Heart rate (HR)

Heart rate is defined as the time that heart beats per unit time. It is usually expressed in beats per minute. It is a very important value in the sport as it tells us numerically, objectively and quickly adapted to the exercise taking place in the athlete. The resting heart rate depends on genetics, physical condition, psychological status, environmental conditions, posture, age and sex. But scholars say that an adult can be given ...