Department of Mathematics Education

# EMAT 6700, J. Wilson

Pulse Rate

J. Matt Tumlin

Comparing your resting heart rate, exercise heart rate, and recovery heart rate is an ideal situation to represent positive and negative numbers.  Students will find their resting heart rate, exercise heart rate, and recovery heart rate to find the class average rates.  The data is generated in class.

To prepare for this activity, ask the class about averaging.  Discuss how they average their grades.  Be sure students know how to read a stopwatch, including reading hundredths of seconds and beyond.  Do not forget to remind students that one-minute equals 60 seconds.

## Directions

When the lab is completed, discuss the meanings of the negative and positive integers in the lab results.  As enrichment, have students determine their personal target heart rate during exercise.  Students can use the following formula to approximate the recommended average target heart rate of 70% of their maximum heart rate:  220 – your age.  Students can also use this formula to determine the target heart rate of family members, friends and classmates.  Then have students calculate the difference between the resting heart rate and the target heart rate.