The Factors of Heartbeat Worksheet

Apa yang membuat jantung kita berdetak lebih cepat saat berolahraga, dan melambat saat kita tidur? Mengapa rasa takut bisa membuat jantung serasa mau copot, sementara rasa tenang membuatnya berirama pelan? Jantung kita adalah mesin pemompa kehidupan yang sangat cerdas. Iramanya diatur oleh berbagai faktor, mulai dari aktivitas fisik, kondisi emosi, hingga apa yang kita konsumsi. Dalam postingan kali ini, kita tidak hanya akan membahas tuntas faktor-faktor yang memengaruhi detak jantung, tetapi saya juga akan membagikan worksheet eksklusif untuk membantu siswa memahaminya melalui kegiatan praktis.

Student Worksheet: Factors Affecting Heart Rate

Name: _________________________

Class: _________________________

Group: _________________________

A. Learning Objectives

• Measure heart rate frequency in different conditions.
• Analyze heart rate data based on influencing factors.
• Conclude the relationship between factors and heart rate.

B. Background Theory

The heart rate, measured in beats per minute (bpm), is a crucial vital sign that indicates the number of times your heart contracts in one minute. It is influenced by a variety of factors including age, sex, body weight, fitness level, and most immediately, physical activity. Understanding these factors helps us monitor our cardiovascular health. In this activity, we will investigate how some of these variables affect heart rate.

C. Tools and Materials

• Stopwatch or phone timer
• Pen or pencil

D. Procedure

1. Measure Resting Heart Rate: Sit calmly in a chair for 2 minutes. Find your radial pulse on your wrist (thumb side). Count the number of beats for 30 seconds and multiply by 2. Record this result.
2. Test Physical Activity
   Jog in place for exactly 1 minute. Immediately sit down and measure your pulse again for 30 seconds, multiplying by 2. Record this result.
3. Collect Group Data: Share your results with your group members and fill in the observation table below with everyone's data.

E. Observation Table

Student Name	Age	Sex (M/F)	Weight (kg)	Resting HR (bpm)	Post-Activity HR (bpm)

F. Data Analysis and Discussion

1. How did physical activity affect your group's heart rates? Why does this happen?

2. Compare the average heart rates between male and female students in your group. Are there any general differences? (If applicable)

3. Looking at your group's data, do you see any potential patterns related to age or body weight and heart rate? Explain.

4. Why is it important for an individual to understand the factors that can influence their heart rate?

G. Conclusion

Based on your activity and data analysis, write a conclusion about the factors that affect human heart rate.