BTEC L3 Diploma in Sport(Development, Coaching and Fitness)

Unit 2 - The Physiology of Fitness

The Bodies Response to Acute Exercise(Assignment 1)

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Introduction to Units and Assignments

• Assignments 1-3• Discussions

Learner Activity..

Write down what you understand by the term musculoskeletal system?

Write down as many muscles as you can remember from previous BTEC L2 sports lessons and PE lessons.

What do you understand by the words anaerobic and aerobic?

Lesson Objectives…

Locate the major muscles of the body (P1)

Locate the bones of the skeletal system (P1)

Identify the energy systems used during acute exercise (P1)

Describe the energy systems used during acute exercise (P1)

Learner Activity 2

Go through learners answers from activity 1

Discuss the bones and the muscles of the body and how they are

attached.

Responses to physical activity

Musculoskeletal responses:

1. Increased blood supply

2. Increased muscle pliability

3. Increased range of movement

4. Muscle fibre tears

Musculoskeletal system

Muscle tissue has four main properties: Excitability (ability to respond to stimuli)Contractibility (ability to contract)Extensibility (ability of a muscle to be

stretched without tearing) Elasticity (ability to return to its normal

shape).

Acute Response of the Energy Systems to Exercise (P1)

The function of the energy system is to produce adenosine triphosphate (ATP).

ATP makes our muscles contract and allows us to take part in exercise.

ATP is made up of protein (adenosine) with three (tri) phosphates attached to it.

Acute Response of the Energy Systems to Exercise (P1)

For the muscles of the body to move the ATP has to be broken down.

When we move and contract our muscles, phosphates are broken off from the ATP to make ADP (adenosine diphosphate).

Acute Response of the Energy Systems to Exercise (P1)

ATP can be found in skeletal muscles and is stored in large amounts.

The body has 3 energy systems that it uses to make ATP, and they differ in the rate at which they supply the muscles with energy.

The 3 energy systems are Phosphocreatine, Lactic Acid and Aerobic.

Acute Response of the Energy Systems to Exercise (P1)

Phosphocreatine Energy System (anaerobic system, also known as the creatine phosphate system)

Lactic Acid Energy System (anaerobic system)Aerobic Energy System

Read through the information provided and describe the 3 energy systems and using the picture diagrams describe how the above energy systems are used in by the muscles.

Creatine Phosphate System