Energy for Exercise Flashcards
What is ATP?
Adenosine Triphosphate (ATP) is a high-energy compound which is the only immediately available source of energy for muscular contraction.
What happens during ATP breakdown?
To exract energy from the ATP, an ezyme called ATPase is released. This stimulates the final high-energy bond to be broken. This is an endothermic reaction which leaves ADP and a single phosphate.
What are the 3 energy systems?
- ATP-PC system
- Glycolytic (anaeobic) system
- Aerobic system
What type of reaction occurs in the ATP-PC SYSTEM?
Anaerobic
What is the site of the reaction in the ATP-PC SYSTEM?
Sarcoplasm
What is the food fuel used in the ATP-PC SYSTEM?
Phosphocreatine
What is the controlling enzyme in the ATP-PC SYSTEM?
Creatine Kinase
What are the specific stages in the ATP-PC SYSTEM?
Coupled reaction
What is the ATP yield in the ATP-PC SYSTEM?
1 : 1
What are the by-products of the ATP-PC SYSTEM?
There aren’t any
What type of reaction occurs in the GLYCOLYTIC SYSTEM?
Anaerobic
What is the site of reaction in the GLYCOLYTIC SYSTEM?
Sarcoplasm
What is the food fuel used in the GLYCOLYTIC SYSTEM?
Glycogen/ glucose
What are the controlling enzymes in the GLYCOLYTIC SYSTEM?
PFK and LDH
What is the ATP yield in the GLYCOLYTIC SYSTEM?
1 : 2
What are the specific stages in the GLYCOLYTIC SYSTEM?
Glycolysis
What are the by-products of the GLYCOLYTIC SYSTEM?
Lactic Acid
What type of reaction occurs in the AEROBIC SYSTEM?
Aerobic
What is the site of the reaction in the AEROBIC SYSTEM?
Sarcoplasm, Matrix and Cristae
What is the food fuel used in the AEROBIC SYSTEM?
Glycogen/ glucose
What is the controlling enzyme of the AEROBIC SYSTEM?
PFK
What is the ATP yield of the AEROBIC SYSTEM?
1 : 38
What are the specific stages of the AEROBIC SYSTEM?
- Glycolysis
- Krebs Cycle
- Electron transport chain
What are the by-products of the AEROBIC SYSTEM?
Carbon Dioxide and Water
What is the energy contiuum?
The relative contribution of each energy system to overall energy production depending on intensity and duration of the activity.
What system is used for very high intensity?
The ATP-PC system will be predominant for activities under 10 seconds. It is contributing to 99% of ATP resynthesis.
What system is used for high intensity?
The glycolytic system will be predominant when the duration of the activity is between 10 seconds and 3 minutes long. It is contributing to 60-90% of ATP resynthesis.
What system is used for low - moderate intensity?
The aerobic system will be predominant where activity is moderate but constant. It contributes to 99% of ATP resynthesis.
What is intermittent exercise?
Activity where the intensity alternates (e.g. work/ relief)
What factors can affect the energy systems contribution to overall energy production?
- position of the player
- tactics and stratagies
- level of competition
- structure of the game
