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Know the body’s response to acute exercise.

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Jade Lowry

on 14 May 2014

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Transcript of Know the body’s response to acute exercise.

Unit 2 The Physiology Of Fitness-
Know the body’s response to acute exercise.

Energy system in response to acute exercise.
This is the system that only allows you to take part in short bursts of energy. The reason for this is because it uses all then energy quickly as its being completed at maximal effort. It also allows an athlete to have a quick powerful reaction. For example Long jump.
Lactic Acid-
This is the system that is required when exercising for a long period of time. The reason for this is because the body needs oxygen circualting around the body in order to keep going. However the exercises only lasts between 60-90 seconds when using this energy system.
This is the energy system thats used for long term exercises that needs oxygen in order to complete the task/activity. This system converts fats/foods into energy so when they run out they can use that storage of energy to finish. However because the heart needs to give this to the body muscles it takes a while to get it to the muscles that need it so it not as quick of effective as other energy systems.

Cardiovascular system in response to acute exercise
Heart Rate Anticipatory Response-
Your resting heart rate is around 60 to 80 beats per minute however this is only in healthy people. In middle aged people its recorded as high as 100 beats. compared to elite athletes that are endurance runners it has been recorded to 28-40 beats a minute. This is because of how healthy and fit the athletes are. Before exercise has began the heart rate begins to slowly rise and this is called anticipatory response. Before the exercise/event happens you begin to get nervous and then this releases chemicals into the body that then increases the heart rate.
Activity Response-
This is very similar to resting heart rate as they have a similar job to complete. At the beginning of exercise the nerves in the brain conduct the task thats given and reduces the chemical into the body so it increases the heart rate to make it faster but also so it strengthen's it so it can keep up with the sudden increase of activity which is making it pump quicker. More blood is being pumped around the body and carrying oxygen to all the working mucles quicker because of the heart pumping faster. Some areas dont need as much blood as others whilst the activity is happening because some muscles are working harder than others.
Increased Blood Pressure-
This is the pressure exerted by cirulating blood upon the walls of blood vessels and is one of the main principals of showing vital signs withint the body. There are two different types of High Blood Pressure and they are systolic pressure and diastolic pressure.
Systolic pressure= the pressure of the blood when your heart beats to pump blood out. Diastolic pressure= the pressure of the blood when your heart rests in between beats.
As exercise is happening both your heart rate and blood pressure are increasing because your body is working its muscles but the mechanisms within the body are controlling this so it doesnt get to high and helps bring it down when it begins to get too high. In aerobic exercise this increases because its trying to meet the demands of the high intensity work out/activity. Along with this your pulse rate also rises to help control it and allow the blood to flow to the muscles quicker so there getting enough oxygen when needed.

Increases the width of the blood vessels so blood flow can pass through quicker.
The cardiovascular system plays the role in helping regulate thermoregulation around the body. When the bodies body temperature increases and becomes high all the blood vessels just underneath the skins surface begin to dilate which increases them in size. Because of the skin surface increasing it allows more heat to be released out through it and transferred out into the air and then this causes the body to cool down.

Decreases the width of the blood vessels which results in the muscular wall of the vessels to not being able to released the contraction especialling in large arteries, it also reduces the blood flow.
When the temperatures body decreases and becomes low the blood vessels decrease in size so they are smaller and make sit more difficult for blood to flow through. It also means that the surface underneath the skin loses the heat travelling through so it cant be released which causes the body to stay too hot.
Respiratory system in response to acute exercise
Increase in breathing rate-

During exercise your bodies muscle cells respire more than what they do when there resting. This is because oxyegn and glucose are being delivered to them quicker so they can replace the amount thats already been used. It also means that carbon dioxide(waste) is being removed quickly. This is all done by the increased breathing rate and heart rate. As the heart rate increases its being detetced by measuring the pulse rate. Along with this the stroke volume has increases as the volume of blood is higher as its being pumped from each beat.
Increased tidal volume-

When taking part in exercise the total amount of tidal volume increases because your reguirements of oxygen go up in order to keep going throughout the exercise. However depending on the type of exercise it is the tidal volume is increased in different ways so then it works effectively when its required and it can meet the demands of increaded oxygen supply.
Musculoskeletal system in response to acute exercise.
Increased blood supply-
When exercising your bodies oxygen demands to be increased because your blood pressure needs to increase in-order for it to keep going. Your nerves system realises that it needs oxygen so it makes the heart pump faster so the because of the muscles demanding the need of oxgen.

Increased muscle pliability-
As the body is warming up the muscles in your body begin to become more flexible because they begin to come more flexible it reduces the risk of injury.

Increased range of movement-
The increases amount of movement your body does the synovial fluid becomes less vicious and helps the movement around a joint become more flexbible and allows it to move smoothly.

Muscle fibre micro tears-
When our msucles are put under pressure they cause the small msucles fibres to rip, because they've ripped this is what causes it to swell and the pressure its putting on the nerve ending. Because of the muscle putting pressure on the nerve ending this is causing all the discomfort and pain.
Musculoskeletal Systems
Allows the body to be able to move and complete tasks by using the different muscles, ligaments, tendons etc.
Provides stability, support and movement.
Is made up of all the bones, tendons, ligaments, cartilage, joints, tissues and the tissues that connect organs together.
Is controlled via the nervous systemm as they send signals out to make a movement happen. These signals come from the brain. The muscles are also contracted by this to create movement.
Energy Systems
All organs, muslces, tissues etc all need energy to be bale to complete signals, movement and actvitites the brain is telling them to do. However energy is used for different ways for different types of atcitvies such as long term and short term exercises.
Long endurance exercises need more energy to be able to complete the task but the body needs it to be produced slowly so then the body can use it as and when it needs it. For example Marathon running.
Short exercises allows the body to use energy in a small burst as the activity doesnt last for very long.The body produces it quickly and uses it throughout the whole activity constantly. For example Sprinting
Cardiovascular System
This is the system that controls the heart and blood. It's responsible for transporting the blood around the body to all the different organs. Its also the main transporting function of oxygen, nutrients, hormones and waste products of the body.
Respiratory Response
Breathing is controlled by the respiratory system. The two main functions of the lungs and tubes are to help oxygen pass through the body so it can provide it to working muscles and all tissues and organs of the body. It also helps to eliminate carbon dioxide from the tissues and muscles and let them eliminate from the lungs out of the body.

The ventilation increases the demand of the respiratory system as acute exercise takes place.
The increase of oxygen and the amount of air that is inhaled and exhaled everytime your breath means that the 'tidal volume' is increasing.
The increase in the diffusion of oxygen and carbon dioxide at the alveloar-capillary interface is due to increase the surface area and the concentration gradients of oxygen and carbon dioxide increases.
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