Thursday 17 January 2013

Short term effects of Exercise

Cardiovascular

* Heart rateWhen exercising your heart rate increases because its pumps blood faster to make more oxygen to get across your body.

*Blood pressureYour blood pressure will increase so blood can get around the body faster. So because the blood flow is increased it increases the blood pressure. 

*Cardiac Output  The cardiac Output is the volume of blood pumped a beat, it will increase if the blood pressure and heart rate increase 

*Stroke Volume The amount of blood pumped by the left ventricle of the heart in one contraction. The stroke volume is not all the blood contained in the left ventricle, normally only about two-thirds of the blood in the ventricle is lost with each beat. Together with the heart rate, the stroke volume determines the output of blood by the heart per minute (cardiac output)

*Why these happen These things happen because your body is adapting to what you are doing so you don't get as tired as quick, compared to if things did not happen you might not be able to run and jump and do heavy exercise. For example if you go for a run your heart rate would increase  because you need to pump more blood around your body and get more oxygen to it as quickly has possible, so that's why your blood pressure increases so your blood pumps faster every heartbeat and this will increase cardiac output which is the volume of blood pumped a minute


Respiratory system

*Breathing rate

When  doing sport your breathing rate will increase over a short spell of time because you need to get more oxygen across the body to the lungs.

*Tidal volume

Tidal volume is the volume of air you breath in a single breath. Exercise causes an increase in tidal volume because your supply for oxygen increases, because you start to breath harder.

*Minute ventilation

Minute ventilation is the amount of air a person breaths in a minute. This will increase the more you exercise because you need to fill your body with oxygen.

Why these happen

These things all happen together to get oxegen around your body as quickly as possible, so that you can run or jump or even throw. You need the oxegen so that you body not only can recover, but so that you can move and not get tired.
If one of these things was not working at its best the 2 would be effected because you need all of them to be working like clockwork to get the oxegen to move as quickly as possible. If Your heart and respiritory sytem have to work together so you can do your best, so if one doesnt recover or work very well it will mean your other one will not be able to perform at its best.


Muscular-skeletal



Micro tears.

When you perform any exercise involving weights and your body, etc: pushups or situps,little muscles in fibre can tear.To help recover you would eat protein foods like fish and chicken etc.
The muscle fibres get repaired and the protein increases the amount of muscle mass in the fibres. you can get microtears anywhere on the body.

Increased Temperature

When you exercise your body needs to rise in body heat to about 40 degrees so that the enzymes in your body can work faster and break down your energy so you can play for longer.

Blood flow

When you exercise your blood flow will rise because you need to get your blood around your body quicker. Your blood needs to get around your body quicker so that your muscles can get the oxygen and nutriants because your body is working at a higher intensity than it would normally be at.

Why these happen

These all happen in sync with respiritory and cardiovascular. Once again if one of them doesnt work then other 2 cant work at there best. For muscular-skeletal you need your body to rise to at least 40 degrees so that your musles can get the right amount of oxegen and nutriants as quickly as possible.













1 comment:

  1. This is another good blog post where you have both described and explained the short term effects of exercise on the body.
    P1 and M1 achieved.

    ReplyDelete