The Effect of Exercise on Heartrate

By: Triston Harper, Laura Herrera, and Caroline Yeager

Our Exercises and Why We Chose Them

The two exercises we chose we sit-ups and jumping jacks. The reason we chose these two exercises for two reasons. First, we wanted the easiest exercises and also the exercise that would make our hearts beat faster. So we decided on sit-ups and jumping jacks and we then conducted an experiment to find out how fast our hearts would beat. We checked our pulses before doing the exercises 3 different times so that we would have a more accurate average. Then we took our heart rate instantly after the exercises, and checked how long it took for the heart rate to go back down to its original average.


The jumping jacks will make the heart rate beat faster than the sit ups. It will take around 3 minutes for the heart rate to go back down to normal for sit ups. It will take over 5 minutes for the jumping jacks.
Independent Variable: Exercise (Sit-ups and Jumping Jacks)

Dependent Variable: Heart rate

Control: Starting Heart Rate

Constants: Duration of exercise, person doing exercise, exercises being done, method of taking heart rate, the time we take the heart rate after the exercise.

Starting Heart Rates

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The jumping jacks will make a heart beat faster than the sit-ups. The average of the heart rates after jumping jacks were faster than the heart beats after sit-ups. In fact, after every single trial the jumping jacks heart beat were faster than those of the sit-ups. The reason the jumping jacks were forcing the heart rate beat faster was because the jumping jacks involved the entire body to be moving therefore the heart had to supply the muscles more oxygen.