How Exercise Effects Heart Rate

If the subject of the experiment were to drink, during the experiment, that would give him an unfair advantage to supply his body with the water loss, therefore the body now has a chance to supply the body's water loss (perspiration) for more efficiency in the experiment.

If the subject were to get wounded (somehow!) in the experiment an amount of blood loss would affect the person's efficiency in the experiment in proportion to how much blood he has actually lost. If blood is lost then there will be fewer red blood cells to carry oxygen around the body and therefore, the oxygen debt would increase quicker and the subject would slow down.

This experiment is also greatly affected by the person's stamina. Stamina is measured in how quick you can restore your pulse rate to normal. The more stamina you have the less oxygen your body requires to do the task you are trying to accomplish. People with more stamina on the whole have bigger lungs and more supple joints. This helps them breathe more air at a time, and they can supply their body with energy via respiration, which is the process of taking energy from the food you eat.

The energy gets supplied to the muscles used for the task and also a person with more stamina on average has more red blood cells getting produced from the bone marrow than people with less stamina. This decreases the oxygen debt. The oxygen debt is the amount of oxygen that the body can't supply the body in time for the particular task, therefore the subject has to cease the task he is engaging in. After this lots of lactic acid is produced. The more stamina you have the more "fitter" you are, therefore the less oxygen debt you have the longer you can row and the less lactic acid produced.

The room temperature must be kept constant so that the subject keeps going on the same. If the room were too hot the subject would lose vital water via perspiration. This will decrease his efficiency in the task of rowing. If the room is too cold, the subject might start shivering of the cold and will then freeze up decreasing his efficiency; therefore the room temperature should be kept constant from twenty to twenty two degrees Celsius.

As more work is done, your pulse rate increases. When it does your heart "beats" faster and struggles to keep a sufficient supply of oxygen to your body, so you use up more energy, then the oxygen debt increases and lactic acid is produced. Later your body takes energy from your food to supply your body's requirements and therefore keep your pulse rate as low as possible. As the work rate done doubles the oxygen intake that is required doubles and so does the required energy. The higher your pulse rate the more "unfit" you are, therefore the lower it is when doing a particular activity the "fitter" you are.

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