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Fitness Data Analysis

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Fitness Data Analysis

Use the fictional data below to investigate how exercise affects heart rate and recovery. Heart rate is measured in beats per minute (bpm). Show calculations where useful. Fitness varies between people; these figures are for analysis, not a target to compare yourself with.

The data set

Three students completed the same short shuttle-run activity. Their heart rates were measured before exercise, immediately afterwards and during recovery.

Student

Before

Immediately after

After 2 min recovery

Ari

156

108

Moana

168

116

Wiremu

144

Read the pattern

Heart rate usually rises during exercise because working muscles need more oxygen. After stopping, it gradually falls towards the person's resting level. The size and speed of these changes can be affected by effort, fitness, health, temperature and other factors. A single activity cannot diagnose someone's fitness or health.

1.For Ari, calculate the increase from before exercise to immediately after. Include bpm in your answer.

2.Which student had the highest heart rate immediately after the shuttle runs? State the reading.

3.How much did Wiremu's heart rate fall during the 2-minute recovery period? Calculate the difference between his immediate and recovery readings.

4.True or false: After 2 minutes, all three students' heart rates had returned to their before-exercise readings. Use one comparison to support your choice.

TrueFalse

5.Ari says, “Moana's higher heart rate after exercise proves she is less fit.” Is that conclusion justified by this data? Explain one reason.

6.Which measurement would best help compare the students' recovery in this investigation?

The change in each student's heart rate from immediately after exercise to 2 minutes later
Each student's height
The number of shuttle runs completed by a different class
The time of day written on the data sheet

7.Calculate the mean (average) of the three before-exercise heart rates. Show your addition and division.

8.Suggest one way to make a repeat of this investigation more reliable, and explain how it would help.

9.Complete a cautious conclusion using the data: “After the shuttle runs, the students' heart rates ; after 2 minutes, they .”