To find out how or if oxygen debt indicates level of fitness.

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31st March 03

Kelly Maloney

Investigating oxygen debt

Introduction

We are trying to find out how or if oxygen debt indicates level of fitness, and if this connects to how long it takes for oxygen debt to be repaid to find this out we will use the evidence from our pulse rates. The variables we will need to keep in mind will be

 Minutes of exersice

 Conditions of exercise, for example if someone is exercise inside where it is hot and someone is exercise outside where it is cold it could make a difference in the loss of body heat

 Using averages from the same day because you could be feeling ill or tired or just different on another day.

Normally when we produce energy we use aerobic respiration, which means with oxygen. We breath in through the nose and mouth, the air then travels down our trachea, through the bronchus then through the bronchiole which are branched off from the bronchiole and into the alveoli which are little air sacs the are then travel through the wall of the alveoli and oxygen is exchanged for carbon dioxide the oxygen is delivered by the blood to the muscles and the rest of the body while the carbon dioxide is breathed out.

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The equation for aerobic respiration is

        

When we exercise we breath faster to take in more oxygen but when we don’t get enough oxygen we have to use anaerobic respiration, which is without oxygen, this is so we can get sufficient energy needed by the muscles. Using anaerobic respiration still gives us the energy we need however it also produces a waste product lactic acid. This is actually a poison and causes the muscles to ache and become tired.

The equation for anaerobic respiration is  

After anaerobic respiration our bodies ...

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