Short Term (Immediate) Effects of Exercise

Transcription

1 Short Term (Immediate) Effects of Exercise qvsmdkc-q6-8xkhb8gz4yxtyteonk9be

2 Short Term (Immediate) Objectives: Effects of Exercise ALL PUPILS - Identify the short term effects of exercise on the body (Respiratory system, cardiovascular system & muscular system) SOME PUPILS - Explain the short term effects of exercise on the body

3 Objective 1: Identify the short term effects of exercise on the body (Respiratory system, cardiovascular system & muscular system) TASK Using the text book identify the short term effects of exercise on the system you have been given. Respiratory System 1. Breathing rate increases 2. Tidal Volume increases 3. Minute Volume increases Cardiovascular System 1. HR increases 2. SV increases 3. CO increases 4. Vascular shunt Muscles 1. Muscles become tired 2. Increase in temperature 3. Increased elasticity 4. Sweating

4 Extension Task Objective 2: Explain the short term effects of exercise on the Cardiovascular System Heart rate - number of times heart beats per minute. Increases because the body needs more oxygen so need to get more blood to working muscles. Stroke volume amount of blood leaving heart per beat. Increases because the working muscles need more oxygen so heart forces out more blood. Cardiac output amount of blood leaving the heart per minute. Increases because heart is beating faster and forcing more blood out per beat to get more blood to the working muscles. Vascular shunt blood is redistributed from areas of less need to areas of more need. This occurs by vasoconstriction and vasodilation. body Respiratory System Breathing rate number of breaths per minute. Increases because body requires more oxygen so you breathe more. Tidal volume amount of air you breathe per breath. Increases because you breath heavier to get more oxygen. Minute volume - amount of air you breathe per minute. Increases because you are breathing heavier and more often as the body needs more oxygen. Muscular System Muscles increase in temperature as they create energy to work. Increase in elasticity as the muscles get warmer they become more flexible and can stretch more. Sweating as you exercise you sweat this is the body s way of regulating body temperature. Muscles become tired energy stores become depleted and lactic acid builds up.

5 Starter 4 in 4 Task 4 minutes to match the term with the correct definition & copy into your glossary. Check answer with the teacher when you think you have done E.g. 1=1, 2=3 etc Key term Definition 1. Anticipatory Rise 1. Re-distribution of blood to working muscles from muscles/organs of less need. 2. Vascular Shunt 2. Volume of blood pumped out of the heart per beat. 3. Stroke volume 3. Raising of the heart rate before exercise begins. Its caused due to the release of adrenaline. 4. Cardiac Output 4. Volume of blood ejected from the left ventricle per minute Answers 1=3 2=1 3=2 4=1

6 Extension Task Objective 2: Explain the short term effects of exercise on the body TASK Produce a mind map to which identifies and explains the short term effects of exercise.

7 1. This Athlete is 20 years old, before you can analyse the data you need to work out their Maximum Heart Rate (MHR).bpm 2. Below are the times that need to plotted on your graph. Before you can do this you need to work out the bpm for each percentage. 5:12-40%-80bpm 5:16-55% 5:20-60% 5:24-68% 5:28-78% 5:32-81% 5:36-70% 5:40-78% 5:44-78% 5:48-67% 5:52-80% 5:56-82% 6:00-85% 6:04-56% 6:08-50% 3. Plot your line graph using the times and bpm shown above.

8

9 Extension Task Objective 2: Explain the short term effects of exercise on the body H6Y4 Short term effects of exercise TASK During exercise your muscles call for more oxygen. How do the muscles get the oxygen they need? Think about the link between the cardiovascular system and respiratory system.

10 Know the key terms Match the term to definition (in the back of books e.g 3-2) Term 1. Heart Rate 2. Stroke Volume 3. Cardiac Output 4. Respiratory Rate 5. Tidal Volume 6. Minute Volume Definition 1. Number of breaths per minute. 2. Number of times the heart beats per minute. 3. Volume of air breathed in/out per breath 4. Volume of air breathed in/out per minute. 5. Amount of blood pumped out of the heart per beat. 6. Amount of blood pumped out of the heart per minute.

11 Know the key terms Write these in books. 1. Heart Rate - Number of times the heart beats per minute. 2. Stroke Volume - Amount of blood pumped out of the heart per beat. 3. Cardiac Output - Amount of blood pumped out of the heart per minute. 4. Respiratory Rate - Number of breaths per minute 5. Tidal Volume - Volume of air breathed in/out per breath 6. Minute Volume - Volume of air breathed in/out per minute

12 Practical Activity 1. Measure and record respiratory rate/heart rate prior to exercise. 2. Students to make predictions as to what will happen following each exercise eg walking for 30 secs, jogging for 30 secs, sprinting for 30 secs. 3. Students to record heart and respiratory rate immediately following each exercise.

13 Plenary Task Answer the following exam questions on the work sheets provided; Which one of the following is a term given for changes in blood flow to the muscles during exercise; a) Stroke Volume b) Resting Heart Rate c) Hypertrophy of blood vessels d) Vascular Shunt There are many long term effects of exercise and training on the body, which one of the following is a long term effect on the heart; a) Increase in stroke volume b) Decrease in stroke volume c) Increase in tidal volume d) Decrease in tidal volume Give 3 short term effects of exercise on the heart (3) Why is lactic acid produced in our muscles? Briefly describe the effects of lactic acid (4).

14