Get Answer: Drop Rachael Heart Question Guide

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Original Question

The drop in Rachael’s heart rate from 82 to 64 is because of her beginning to do more cardio exercises often. There is a reason why exercising regularly is praised so much, it is because of the many benefits it has for the body, especially the heart! To understand how this helped Rachael, it is important to be aware of what stroke volume is and what it does. Martini explains that stroke volume is the amount of blood ejected by a ventricle of the heart during one contraction. This means the amount of blood pumped is measured per beat. Stroke volume can be affected by cardiac exercises because it strengthens the heart muscles. When a person is not usually active, they don’t have as much muscle in their heart so their heart needs to make more contractions to pump enough blood. When a person starts exercising, their heart has the muscles that help to pump more blood with each pump, allowing less contractions but still enough blood supply to the body. Resting cardiac output is how much blood is pumped within a minute while resting. This number does not change significantly to note because as explained earlier, the heart pumps the same amount of blood but adding muscle only allows the heart to pump more during one contraction. Respond to this

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