Question

diastolic bp ______ mmhg
pulse pressure ______ mmhg
mean bp ______ mmhg
stroke volume ______ ml/beat
cardiac output ______ l/minute
activity 3
calculating the percent change in heart rate, stroke volume, and cardiac output
calculating the percent change allows one to more easily compare data between separate individuals. for example, suppose johns heart rate goes from 60 beats/min to 90 beats/min, while joes heart rate goes from 90 beats/min to 120 beats/min. in both individuals, the difference between resting and post - exercise heart rates is 30 beats/min. however, johns heart rate changed by 50%, whereas joes heart rate only changed by 33%. even though both heart rates changed by 30 beats/min, johns change was more significant. analyzing the percent change rather than the raw data gives us more insight into how heart rate, stroke volume, and cardiac output are affected by exercise.
heart rate
the percent change in heart rate can be calculated with the following equation.
%δhr = \frac{hr_{post exercise}-hr_{resting}}{hr_{resting}}×100
calculate the percent change in heart rate and record the value below.
percent change in heart rate = ______ %

Explanation:

Step1: Identify resting and post - exercise HR

Let $HR_{Resting}=60$ beats/min and $HR_{Post Exercise}=90$ beats/min.

Step2: Apply the percent - change formula

\[

$$\begin{align*} \%\Delta HR&=\frac{HR_{Post Exercise}-HR_{Resting}}{HR_{Resting}}\times 100\\ &=\frac{90 - 60}{60}\times 100\\ &=\frac{30}{60}\times 100\\ &= 50 \end{align*}$$

\]

Answer:

50