1. L8: Exercise Learning Objectives:
Recall the word equation for respiration.
Describe the effect of exercise on heart rate and breathing rate.
Explain why exercise effects the heart rate and breathing rate by linking to respiration.

2. Practical: Heart Rate and Breathing Rate
Heart rate = number of heart beats per minute
Breathing rate = number of breaths per minute
Hypothesis: Write a prediction for what will happen to your heart rate and breathing rate after light exercise and after hard exercise.
While sitting still we are going to count the number of heart beats and breaths in one minute.
This is your resting heart rate and resting breathing rate.

3. Respiration
Breathing and heart rate both increase when you exercise.
Why?
Respiration gives cells energy.
Glucose + Oxygen  Carbon Dioxide + Water
Energy!