Download The Physiology of Fitness

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