Exercise Effects on Heart Rate
Year 8 Science Investigation How does exercise change our body? WALT: Demonstrate understanding of how exercise affects heart rate and breathing rate
What happens to your body when you exercise?
Think about the last time you ran or played sports What did you notice about your breathing? What about your heart? Turn to your partner and discuss for 30 seconds
Key Terms We Need to Know
Heart Rate (Pulse Rate): How many times your heart beats per minute Breathing Rate: How many breaths you take per minute Exercise: Physical activity that makes your body work harder Investigation: A scientific test to find out something
Baseline Measurements
Find your pulse on your wrist or neck Count your pulse for 30 seconds (teacher will time) Count your breathing for 30 seconds Record your resting rates on your data sheet
Why Does Exercise Change Heart and Breathing Rates?
{"left":"During exercise your muscles need more oxygen\nYour heart beats faster to pump more blood\nYour breathing gets faster to take in more oxygen","right":"Blood carries oxygen from lungs to muscles\nThis helps muscles work harder and longer\nYour body is like an amazing machine!"}
Our Investigation Plan
What will we measure? Heart rate and breathing rate When will we measure? Before and after exercise What exercise will we do? Step-ups or jogging on the spot for 1 minute How will we keep it fair? Same exercise time, same measurement method
Time to Exercise and Measure!
Exercise for exactly 1 minute (teacher will time) Immediately measure your pulse for 30 seconds Then measure your breathing for 30 seconds Record your results and compare with resting rates
What Did We Discover?
Exercise increases both heart rate and breathing rate Our bodies need more oxygen during physical activity The heart and lungs work together as a team This investigation shows how our bodies adapt to exercise Scientists and sports professionals use this knowledge to help athletes