The Muscular Heart 7 th Grade, Physical Education – Ms. Cavallo
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The Muscular Heart7th Grade, Physical Education Ms. Cavallo
What is the Heart?The most important muscle in your body.
Purpose is to pump blood throughout the entire body!
Carries oxygenated blood to organs and muscles, and carries carbon dioxide to the lungs to be exhaled through the circulatory system
Working with a partner, draw arrows inside the picture on your guided worksheet showing how you think blood flows through the heart.
Were you and your partner right?The flow of blood through the heart
Finding Your Pulse and Recap2 Ways to find your pulse
1. Radial Pulse
2. Carotid Pulse
Calculate your resting heart rate. 1. Find your pulse, and count how many pulses you feel for 1 minute. 2. Write down your resting heart rate in the space provided on your guided worksheet.
Lets Exercise!
Starley - Call on Me (Ryan Riback Remix)
What do Yall Think?Working in your group of 4, compare your heart rates directly after exercise.
Were all of your heart rates the same?
Whose was the highest, the lowest?
Why do you think your heart rate increased? Come to a final conclusion as a group and select one spokesperson to explain your answer to the class.
Calculate your heart rate now.
1. Find your pulse, and count how many pulses you feel for 1 minute. 2. Write down your heart rate directly after exercise in the space provided on your guided worksheet.
So Why does Heart Rate Increase During Exercise?
Change of blood flow. Blood flow increases and stroke volume increases to supply blood to the major skeletal muscles involved during exercise.Stroke volume the amount of blood pumped by the left ventricle
Muscles need oxygen to contract and function; 100% of capillaries open to increase blood flow to skeletal muscle.Capillaries the smallest blood vessels in the circulatory system
Breathing rate also increases. The muscles need more oxygen to function at a higher rate and more carbon dioxide needs to be released.
Why is Everyones Heart Rate Different?Body size
Previous experience with exercise
Fitness levels
Health levels
Genetics
Working in your group of 4, think about 2 different reasons why heart rates vary from person to person. Both resting and heart rate after exercise.
Recovery Heart RateRecovery heart rate is the amount of time it takes the heart to return to normal after physical activity.
A healthy, conditioned heart will recover more quickly after exercise than a deconditioned heart.
2-Minute RecoveryMeasure your heart rate immediately after exercise. Wait 2 minutes to take your recovery heart rate. 2-Minute Recovery HR Working HR = Base Line for Improvement
Measure your heart rate! Find your pulse and count how many pulses you feel for 1 minute. Is your heart rate back to normal?
What did We Learn?We learned how to find our pulse 2 different ways.
We learned that the heart is a muscle and it needs to get exercise just like our other muscles.
We learned how to measure our heart rates and track for improvement.
What else did we learn?
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