BTEC FIRST CERTIFICATE IN SPORT

ENERGY SYSTEMS

3 Main Energy Systems

1. Creatine Phosphate System

also known as the “Alactic Acid” system

2. Lactic Acid System

3. Aerobic Energy System.

CREATINE PHOSPHATE “ALACTIC ACID” SYSTEM

• THIS GIVES US IMMEDIATE ENERGY• Works WITHOUT 02 - ANAEROBIC• Muscular contractions rely on a high energy compound found stored

within our muscles called ATP – Adenosine Triphosphate.• ATP releases energy instantly, but it does not last long.• The small stores of ATP will give enough energy to last for 5 -8

seconds of very high intensity work.• When our muscle stores of ATP are used up we can quickly re-

make more ATP from another chemical compound stored in our muscles called CREATINE PHOSPHATE

• This is also stored in small amounts and will only give us enough energy for about another 10-20 seconds of hard work

• After a burst of activity we need to rest to allow our bodies to refill their CP stores.

LACTIC ACID SYSTEM

• THIS GIVES US SHORT TERM ENERGY• Works WITHOUT 02 - ANAEROBIC• When we work hard for 10 seconds our ATP and PC stores are nearly used

up.• We breathe more quickly and deeply – this is to supply 02 to the muscles to

re-make our ATP so that we can continue (02 debt).• This takes time for O2 to get into bloodstream and to reach muscles.• In the mean time LA system uses GLYGOGEN to re-make ATP• We produce glycogen from the breakdown of CARBOHYDRATES in our

food and store it in the liver and muscles.• Glycogen is used to re-make ATP• If not enough 02 is available at the same time then LA is formed.• If LA builds up contractions will become painful and we become tired.• Cannot use LA system long – about 1 minute of hard work.

AEROBIC SYSTEM

• THIS GIVES US LONG TERM ENERGY• Works WITH 02 – AEROBIC• We use this when enough 02 reaches the working muscles.• Glycogen and 02 together re-make ATP.• When enough 02 is available, LA is not formed.• The waste products are H20 and C02, which do not cause tiredness.• The aerobic system can carry on for a long time.• We use this system for all light exercise and most daily tasks.• It gives us energy slowly• The energy comes from the breakdown of Carbohydrates and Fats.• It gives us energy too slowly for intensive activity.

ENERGY SYSTEMS AND SPORT

• The energy we need for different sports varies a great deal and in many sports all three energy systems will work together at different times to supply the energy needed.

• Look at the sports and activities shown in the pictures and decide which of the 3 energy systems is the primary energy provider.

The following blocks represent the energy systems. Identify each activity with respect

the energy blocks 100m, 400m 1500m marathon.

aerobic ATP-PC Lactic acid

WHAT HAVE YOU LEARNED?

• 1. What are the names of three Energy Systems?• 2. What does ATP stand for?• 3. When ATP runs out, what other chemical compound stored in

the muscles can re-make ATP?• 4. How long does the Lactic Acid system last for?• 5. What substance, which is stored in our muscles re-makes ATP

for the Lactic Acid System?• 6. How is glycogen produced and where is it stored?• 7. What does Anaerobic mean?• 8. What is 02 Debt?• 9. Why does Lactic Acid build up?• 10. What are the waste products created from the aerobic system?