Energy Systems Flashcards
Define VO2 max
The maximum volume of oxygen that can be taken in and diffused into the muscles per minute
What is sub-maximal oxygen deficit?
When there is not enough oxygen available at the start of exercise to fuel the aerobic energy system
What is the fuel source of the ATP-PC system?
Phosphocreatine
What is the intensity of the ATP- PC system?
Very high (95% of max HR)
What is the duration of the ATP-PC system and what is its timing of optimal functioning?
10 seconds (general lasting time)
2 - 4 seconds (peak power time)
What is the amount of energy produced in this time period?
1 ATP broken quickly to produce an explosive burst of energy
What is the speed of production?
ATP is broken instantaneously (quickest fuel source)
What is a by product of the ATP-PC system?
Inorganic phosphate (ADP) (+Pi)
What is the total time which the ATP-PC system is able to function in?
10 seconds at the beginning of exercise
What is the ATP PC system also called?
Alactic acid
What is the fuel source of the lactacid system?
Glycogen
What is the lactacid system also called?
Anaerobic Glycolytic system
What is the intensity of the lactacid system?
High (85% max hr)
What is the duration of the anaerobic Glycolytic (lactacid) system?
10-75 seconds
What is the peak performance timing of the lactacid (anaerobic system?
5-15 seconds
How much energy is produced during the lactacid system?
2-3 ATPs
What is the speed of production of the lactacid system?
Fast and includes longer lasting chemical reactions
What are the by-products of the lactacid system?(3)
Lactic acid
Hydrogen (H+ ions)
ADP
How long is the lactacid system’s duration?
10-75 seconds until full depletion
What is the fuel source of the aerobic system?
- CHO
- Fats (after CHO is fully depleted)
- Protein (last resort)
What is the intensity of the aerobic energy system?
Sub-maximal exercise working at less than 80% max heart rate
What is the duration of the aerobic energy system?
Over 75 seconds
How much energy is produced from the system?
CHO produces between 34-38 ATP per glucose molecule
Fats can produce up to 441 ATP per triglyceride molecule
