The document discusses the three main energy systems in the human body - ATP-PC system, lactic acid system, and aerobic system. It explains that the ATP-PC system generates ATP the fastest but runs out quickly, lasting 8-10 seconds and being used for explosive activities like sprinting. The lactic acid system generates ATP anaerobically for 2-3 minutes of intense exercise. The aerobic system is the most efficient but slowest, generating ATP aerobically through oxygen for activities lasting over 5 minutes. The document provides details on how each system works on a cellular level to break down nutrients and generate ATP.

1. School of Medical and Allied Science
Course Code : BPTH4004 Course Name: Physiotherapy in Sports Condition-1
ENERGY SYSTEM
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT

2. INTRODUCTION
ENERGY SYSTEM
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT
The human body has two main energy
systems it gets its power from; the
aerobic and the anaerobic system., but
how many of us really understand how
they work? All human cells use ATP to
generate power

3. INTRODUCTION
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT B
Overview ofPowerPoint

4. INTRODUCTION
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT
Our body stores energy in the form of
Adenosine Triphosphate (ATP)
ATP made up of 1 Adenosine molecule
and 3 phosphate molecules
Is where TRI Phosphate comes from

5. INTRODUCTION
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT
Our body requires energy, this energy comes
from the breakdown of ATP in our cells.
Breakdown of ATP=Energy=Movement
All energy for cellular activity comes from ATP
Energy

6. INTRODUCTION
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT

7. How ATPis generated
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT
Mitochondria, using oxygen available within the cell
convert chemical energy from food in the cell to energy in
a form usable to the host cell. NADH is then used by
enzymes embedded in the mitochondrial inner membrane
to generate adenosine triphosphate (ATP).In ATP the
energy is stored in the form of chemical bonds.
In the mitochondria, the metabolism of sugars is
completed, and the energy released is harnessed so
efficiently that about 30 molecules of ATP are
produced for each molecule of glucose oxidized.

8. How ATPis generated
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT
Our cells can’t get energy directly from food
Needs to be stored as a useable form of energy
ATP
The food we eat contains energy (kilojoules)
This energy is used to produce ATP molecules
Energy is stored in ATP like a battery

9. Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT

10. Nutrients
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT

11. Energy Systems
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT
 ATP is generated through 3 different energy
systems
 The energy system the body generates it
through depends on the intensity and the
duration of the exercise being performed
 ATP-PC system = very quick explosive exercise
 Lactic Acid system= Moderately intense
exercise lasting several minutes
 Aerobic system= Long duration exercise

12. Anaerobic and Aerobic
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT
 An anaerobic energy system is one
that does not require oxygen to
generate ATP
 An aerobic energy system is one that
does require oxygen to generate ATP

13. ATP-PCsystem
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT
Is an anaerobic energy system
Used for explosive exercises lasting 8-
10 seconds
Generates ATP very quickly but only
limited supply (runs out quick)
The most inefficient energy system

14. ATP-PC system- How it works
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT
ATP is stored in the muscles and liver for quick
access
ATP stores run out in 2-3 seconds
When you move ATP is broken down to ADP +P
to generate energy for the body to use.
When the Phosphate is split that’s where the
energy comes from
ATP stores in the muscle run out very quickly
therefore we must generate more
VERY useful for quick explosive exercises,
generates ATP very quickly but also runs out
quickly

15. ATP-PC system- How it works
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT

16. When is the ATP-PC systemused?
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT
When is the ATP-PC system the main energy system used?
Heavy Weight lifting 100m sprint

17. ATP-PC recap
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT
Phosphate creatine (PC) is broken down,
breaking it down releases energy that is used
to form ATP from ADP and P + energy
PC stores only last approximately 10 seconds
Therefore used for short exercises (100m
sprint)
Generates ATP very quickly

18. Lactic acid energysystem
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT
 Also known as the Anaerobic energy system
 Breaks down glucose and glycogen to form
ATP
 Generating ATP through this energy system
also produces lactic acid
 Lactic acid causes our body to fatigue
 Therefore can only be used for exercises
lasting 2-3 minutes
 Lactic build up makes muscles feel heavy and
tired

19. Lactic acid energy system-How itworks
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT
 When the muscles run out of PC stores must generate
ATP another way – lactic acid energy system
 Body breaks down glucose or glycogen to generate
ATP through a process called Anaerobic glycolysis or
just glycolysis
 If oxygen is not present the body will also produce
lactic acid in the process
 1 molecule of glucose will produce 2 molecules of ATP
 1 molecule of glycogen will produce 3 molecules of
ATP
 Glycogen is stored in the muscles and liver

20. True or false?
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT
The ATP-PC system can only be used once every
30 minutes.
False!
The ATP-PC system is able to almost fully restore
itself in 3 minutes.

21. Lactic acid energy system
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT
When is it predominately used?
 Intense exercises lasting 2-3 minutes
400-800m run
Many team sports- Netball, football ect

22. Aerobic energy system
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT
 Most efficient energy system – also slowest
 Can only generate ATP in the presence of
oxygen
 Is used for long distance events or exercises
lasting longer than 5 minutes

23. Aerobic energy system- How itworks
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT
 Begins the same way the lactic acid energy system
does- breakdown of glucose and glycogen
 If oxygen IS present lactic acid will not be produced
and instead more ATP is formed through Aerobic
glycolysis
 Generates ATP much slower than Anaerobic glycolysis
and even more slower than ATP-PC system therefore
is used for low intensity/long duration exercise.
 With oxygen 1 glucose molecule generates 36
molecules of ATP
 1 glycogen molecule generates 37 molecules of ATP
Fatty acids are broken down to produce 129ATP

24. Aerobic system-When is it used
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT
When is it used?
Continuous exercise lasting longer than 5 minutes
Marathon Long distance cycling

25. Quick quiz
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT
1.Which energy system is the quickest?
2.Which energy system is the most efficient?
3.If I was running a 800m what energy system would I
predominately use?
4.True or false – Sitting down would use the aerobic energy system
5.What are carbs, fats and proteins broken down to when they first
enter the body?

26. Answers
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT
1.ATP-PC
2.Aerobic
3.Lactic acid
4.True
5. Glucose, fatty acids and amino acids

27. Overview
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT B.Tech

28. Using multiple energy systems
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT
An exercise can use more than one energy system –
Many exercises do
For example a swimmer diving off the blocks to swim
1500m will initially use the ATP-PC system to dive off
the blocks quickly but then switch to the aerobic
energy system to swim 1500m
A football player will use the ATP-PC system to have a
quick run or make a tackle, but then switch to aerobic
when high intensity movement is not required.

29. Advantages and disadvantages
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT
What are some advantages and disadvantages of each energy system?

30. Reference
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT
Book by karim khan sports medicine

31. Answers
Name of the Faculty: Dr. Shahiduz Zafar Program Name: BPT