Initial Responses to Exercise Essays

1422 Words Oct 1st, 2014 6 Pages
Initial Responses to Exercise

Cardiovascular Responses:
Heart rate increases in a linear fashion to intensity of the exercise. This means the higher the intensity of the exercise, the higher the heart rate would be. The heart rate activity response because of the workload it has. The harder you exercise the more oxygen you need in the muscles so the increased heart rate means blood is pumped around the body quicker.
Anticipatory response is the adrenaline that triggers the heart rate to increase to prepare for exercise.
Stroke volume is the volume of blood being pumped into the heart with each beat. Stroke volume also increases when the intensity of exercises increases
Cardiac output is the volume of blood being from the heart
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Our breathing rate increases so we can bring in more oxygen into our lungs.
Intercostal Muscles - During exercise when we need high amounts of oxygen we breathe in quicker and deeper. During our breaths the lungs expand and contract. This is where the intercostal muscles play a key role. These intercostal muscles are located in between our ribs, helping form and move the chest wall. They increase the size of the chest cavity by expand when we breathe in, preventing the ribs and lungs from any damage.
Tidal volume is the amount of air you breathe in a single breath. As we have concluded before, our breathing rate increases during exercise. This then means the amount of air we breathe in also increases.
The Valsalva manoeuvre is a way of increasing support and pressure of the back and abdominals. This is mainly seen in power lifting where people who are lifting heavy use this to help them. To do the manoeuvre you hold your breath while straining, for example when lifting heavy weights. This isn’t recommended because it can lead to increased blood pressure which causes dizziness, fainting, decreased blood flow to the heart, and even stroke.
Pulmonary Ventilation - As exercise starts pulmonary ventilation increases in direct proportion to the intensity and metabolic needs of the exercise. Ventilation increases to meet demands of exercise through two methods: through

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