Interactive worksheet teaching students how heart rate changes during physical activity.

Problem Overview:

The task involves measuring and recording changes in heart rate (pulse rate) during different activities, specifically at rest and during physical activity. The goal is to understand how the heart rate changes under these conditions.

Steps to Solve the Problem:

#### 1. Understanding the Task:
- The task requires measuring your pulse rate at specific intervals.
- You will measure your pulse rate:
- At rest (0 minutes, 6 minutes, 8 minutes, and 10 minutes).
- During physical activity (2 minutes and 4 minutes).

#### 2. Measuring Pulse Rate:
- Pulse Rate Definition: Your pulse rate is the number of times your heart beats per minute (BPM). It can be measured by counting the number of beats felt in a specific time period (e.g., 30 seconds) and then converting it to beats per minute.
- Conversion Formula: If you count the number of beats in 30 seconds, multiply that number by 2 to get the BPM.

#### 3. Recording Data:
- Use the provided table to record your data at each time interval.
- The table has two sections:
- Number of beats in 30 seconds: This is what you directly count.
- Pulse rate (beats per minute, BPM): This is calculated by doubling the number of beats counted in 30 seconds.

#### 4. Procedure:
1. Find Your Pulse: Locate your pulse on your wrist or neck with help from your teacher.
2. Start Counting: When instructed, start counting the number of beats you feel for 30 seconds.
3. Stop Counting: Stop counting when told and record the number of beats in the "0 minutes (resting)" column.
4. Calculate BPM: Multiply the number of beats by 2 to get the BPM and record it in the corresponding column.
5. Repeat for Physical Activity: After engaging in physical activity, repeat the process for the "2 minutes (physical activity)" and "4 minutes (physical activity)" columns.
6. Rest Periods: Measure your pulse again during rest periods (6 minutes, 8 minutes, and 10 minutes) and record the data similarly.

#### 5. Analyzing the Data:
- Compare your pulse rates at rest and during physical activity.
- Observe how your heart rate increases during physical activity and decreases during rest periods.
- Discuss any patterns or trends observed with your classmates.

Example Calculation:

- Suppose you counted 25 beats in 30 seconds during rest.
- BPM = 25 × 2 = 50 BPM
- During physical activity, if you counted 40 beats in 30 seconds:
- BPM = 40 × 2 = 80 BPM

Final Answer:

The solution involves systematically measuring and recording your pulse rate at specified intervals, calculating the BPM, and analyzing the data to observe how your heart rate changes during rest and physical activity. The exact numbers will depend on your measurements, but the process remains consistent.

Final Answer:
\boxed{\text{Follow the steps outlined above to measure and record your pulse rate at different intervals, calculate BPM, and analyze the data.}}