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    After several months of training, an athlete had the same cardiac output but a lower resting heart rate than before. Explain this change
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    (Original post by Tara13245)
    After several months of training, an athlete had the same cardiac output but a lower resting heart rate than before. Explain this change
    Well, the heart muscle is kinda like skeletal muscle in that it can be strengthened and conditioned by training. If you strengthen the heart muscle, you will have an increased stroke volume (volume of blood pumped out by the ventricles per beat). And as you should know, CO = SV x HR, so if you rearrange that equation into HR = CO / SV, you'll see that an increase in SV will cause a decrease in HR
 
 
 
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