Steady State Excercise- Poster 2

CV Steady State

CV Steady State Exercise

Steady State Excercise

Venous Return- This is the flow of blood back to the heart. When in steady state exercise the venous return must be equal to cardiac output because the cardiovascular system is a loop if it didn't blood would group up in either the pulmonary or systemic circulations. The cardiac output and venous return are independent but each can be independely regualted.

Thermoregulation- Thermoregulation is the process of keeping a constant body tempreature. For humans this is 37'C. If the core tempreture of the human body is increased by 1'c then this will have an affect on their physical and mental performance. When we exercise we produce a great amount of excess heat, the cardio vascular system is important that this excess heat is able to be lost so that the core body does not over heat. This heat is usually lost from sweating and through the dilation of blood vessels.

Cv Steady State

CV Steady State

Cardiac Output- This is the amount of blood that is pumped out by the heart in 1 minute. The cardiac output increase depending on if the stroke volume or/and the heart rate of the body increases. The cardiac output of the body also increases on the intensity of the exercise because it needs to keep up with the demand that the body has. Once the heart rate and the stroke volume stop at a steady speed the cardiac output of the body will do the same.

Blood pressure- During steady state exercise there is a temporary increase in systolic and a decrease in the diastolic blood pressure. These numbers are determined on the pressure on your arteries when the heart is contracting and also when it is inbetween contraction. With aerobic long term steady state excercise it has benefits on blood pressure because it can reduce your blood pressure all togther. Resting heart rate is usually reduced by endurance training.

CV steady state

Blood Flow- As you exercise the blood vessels in your muscles dilate and the blood flow around the body is greater. When not taking part in excise the organs around the body require more blood but when exercise commences the muscles need a bigger proportion of blood to provide them with energy. The body is able to redirect the amount of blood that is sent to certain places around the body by constricting the blood vessels that lead to the bodies main organs. So this means the blood vessels get smaller. The process of the blood vessels constricting is known as vasoconstriction and the process of the blood vessels dilating is known as vasodilation.

Steady State Exercise

Cv Steady State

Stroke Volume- When exercising the stroke volume of the body increases meaning the increase in blood flow makes the cardiac muscle stretch alot more in order to be able to deal with the demand of the body. The heart then has pump alot harder with more force because it is pumping out much more blood than it is used to. This effect on the heart and stroke volume is known as the starking's law.

Respirtory- Steady State

Steady state is when the body is working at a steady state it means that lactic acid removal is occuring at the same pace as lactic acid production.

This type of exercise can occur in any sport because as long as you are maintaing a steady speed then you are constantly working around the same heart rate. It could occur in running, biking or swimming because in these sports you tend to maintain the same speed throughout.

Tidal Volume & Breathing Rate-

Tidal volume is the maximum amount of air breathed in and out in one breathe.

Breathing Rate also known as the respiration rate is the number of breathes taken in by the body per minute.

In steady state exercise the tidal volume and the breathing rate of the body peak with in the first few minutes so that it can adapt to the type of exercise that is being undertaken, then over time it reamins the same throughout until the excercise that is been undertaking has been completed.

Cv steady state

Respiratory- Steady State

Heart Rate - At the start of the exercise the heart rate increase fairy rapidly in relation to the intensity of the heart rate. When the intensity stays the same then the heart rate will be able to reach a new steady state value in 1-2 minutes. If the intensity then increase even more then it will take longer for the heart rate to be able to find a steady state. This often occurs for long distance runners because once they find the speed in which they want to run at then they maintain this speed throughout.

Effects of pH and Temperature on the oxygen dissociation curve:

During exercise the blood becomes more acidic because of the increased production of carbon dioxide. This increase in carbon dioxide and decrease in the PH levels moves the dissociation curve which means more oxygen is released to the tissue. As muscles exercise they also increase in tempreature. This makes the curve move to the right which means more oxyen is released freely also if the tempreature is decreased then the curve moves to the left which means it increase the oxyen intake on the body.