Exercise AND Heart RAte



Exercise AND Heart RAteWhen you exercise the demands for energy in your muscle cells increase. Therefore, your heart must increase the speed at which the blood delivers oxygen and nutrients. How hard is your heart willing to work? In this investigation, you will learn about the circulatory system by monitoring your heart rate while resting and while exercising. ObjectivesInvestigate and record how physical activity affects the heart rate and blood flow through the cardiovascular system. Materials and EquipmentData collection systemHand Grip Heart Rate Sensor SafetyFollow these important safety precautions in addition to your regular classroom procedures:Do not attempt this activity if physical exertion will aggravate a known health issue. Notify your teacher before proceeding.The Hand Grip Heart Rate Sensor is meant for educational purposes and should not be used for medical/diagnostic purposes.ProcedurePart 1 –Calculating Resting Heart RateYour heart rate is the number of times your heart beats per minute and it is expresses as beats per minute (bpm). Normal heart rate varies from person to person, and changes as you age. Your resting heart rate is the heart pumping the lowest amount of blood you need because you are not exercising. In this part you will calculate your resting heart rate. You need to be sitting and calm. 1.Working in pairs, one student is in charge of collecting the data and keeping track of the time while the other students is being measured. 389328923370002.Select Sensor Data in SPARKvue. 3.Connect hand grip heart rate sensor to your device. 4.Sitting in a chair, grasp the hand grip sensors with both hands to wake up the sensor (see Figure 1). (There is no power button in this sensor.) Make sure your hands and grips are clean to make a good contact. Select the graph template. 4087495138065Figure 1. Hand grip set up.0Figure SEQ Figure \* ARABIC 1. Hand grip set up.5.Your partner will begin recording data. Make sure you are looking away from the screen as the data is recorded.6.Measure your resting heart rate for one minute. It is important that you are relaxed and remain still during data collection. (There is sometimes a 20-second delay in detecting your heart rate.) 7.Record your data in Table 1. 8.Switch places with your partner. 9.Repeat data collection for a total of three trials. 10. Calculate your average resting heart rate for the three trials (this is your resting heart rate). 11.Collect data from other classmates in Table 1 and compare the data. Part 2 –Calculating Heart Rate During Exercise and Recovery TimeNow that you have established your resting heart rate, you will investigate: (1) how your heart rate changes as you do exercise, and (2) the recovery heart rate time. Recovery heart rate time is the time it takes for your heart to return to its resting heart rate after exercise.Follow the same procedure as before, but this time you will measure heart rate during exercise for three minutes and continue measuring until the heart rate returns back to the resting value.12.Standing up, grasp the hand grip sensors with both hands. 13.Your partner will begin recording data. Make sure you are looking away from the screen as the data is recorded.14.With the hand grips in your hand, start doing jumping jacks (see figure 2). Pace yourself to sustain exercise for three minutes. 51637991616650015.After exercise, sit down and relax for two more minutes while data collection continues. (Do not look at the data as it is recorded.)16.Record the heart rate value after the two-minute interval in Table 2. 17.Continue collecting data until your heart rate returns to the initial resting heart rate. This is your recovery time. Record the time in Table 2. 18.Stop data collection.19.Switch roles with your partner. 503223016781Figure 2. Jumping jacks.00Figure SEQ Figure \* ARABIC 2. Jumping jacks.20.Sketch your data for heart rate versus time in Graph 1. 21.Collect data from other classmates in Table 2.Data CollectionPart 1 –Calculating Resting Heart Rate1.Enter your data from Steps 7 and 11. Table 1: Heart rate when resting. Trial 1Trial 2Trial 3AverageYour heart rateStudent 1Student 2Student 3Student 4Part 2 –Calculating Heart Rate During Exercise and Recovery Time2.Enter your data from Steps 14 through 17.Table 2: Heart rate when exercising and recovery time. TrialExercise heart rate (maximum)Heart rate after the 2-min resting intervalRecovery time* (seconds)Your heart rateStudent 1Student 2Student 3Student 4*Recovery time: time from end of exercise to initial resting heart rate. 3.Plot a graph of Heart Rate (beats/minute) versus Time (seconds) in Graph 1 from Step 20. Label the points at which exercise started, stopped, and recovery time. Graph 1: Heart rate versus time208320853588Time (seconds)Heart rate (beats/minute)200400600Time (seconds)Heart rate (beats/minute)200400600Questions and Analysis1.Describe your heart rate for the one-minute interval from Step 6. 2.What factors, do you think, can affect your resting heart rate? 3.How does your heart rate during exercise (Part 2) compare with your resting heart rate (Part 1)? 4.How does your resting heart rate and your exercise heart rate compare with the heart rate for the rest of the class?5.Explain what happened to your respiratory rate during exercise and during the resting period after exercise. Explain if there is a change. 6.Predict what would happen if your heart rate failed to increase during exercise. ................
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