# Investigation Question: How does Body Mass Index affect heart rate with respect to exercise?

BMI and Heart Rate

Investigation Question: How does Body Mass Index affect heart rate with respect to exercise?

Null Hypothesis: Body Mass Index has no affect on heart rate with respect to exercise

Alternate Hypothesis: If the Body Mass Index increases, then there will be a higher increase in heart rate with respect to exercise.

Independent Variable: Body Mass Index (BMI)

Dependent Variable: Percent increase of heart rate

Constants: temperature, time of jumping jacks, BMI chart, time to count heart rate

Control: Resting heart rate values

Materials: stopwatch, 20 subjects, open space, calculator, Body Mass Index chart,

Procedure:

1. Have subject derive their BMI with respect to their height and weight on the provided chart. Record value
2. Take subject’s resting heart rate by counting their pulse for 10 seconds, and then multiplying by 6 for the 60 seconds in a minute. Record value
3. Using a stopwatch, have the subject do jumping jacks for exactly one minute
4. After jumping jacks, immediately take subject’s heart rate by counting pulse for exactly one minute
5. Record value in data table
6. Calculate % increase of heart rate using the formula provided below. Record value in data table
7. Repeat process for multiple trials (20 total)

Formula for calculating percent increase of heart rate:

(Heart rate after jumping jacks) – (resting heart rate)

% Increase=   __________________________________________________________________    X 100

(resting heart rate)

Conclusion:

From our processed data and graphs, it is clear that our ...