12 Questions
What is the name of the metabolic system that uses stored ATP and PC?
ATP-PC system
What is the maximum duration of activity supported by the Anaerobic (alactic) system?
Fifteen seconds
What is the purpose of modifications to the basic starting positions?
All of the above
What is the name of the starting position where the individual is upside down?
Hanging
What is the primary energy source for the Aerobic system?
Glycogen and fatty acids
What happens when the Anaerobic system's energy stores are depleted?
Contraction stops due to lactic acid build-up and oxygen debt
What is the primary reason for contraction stopping in the Anaerobic: lactic acid system?
Lactic acid build-up and creation of oxygen debt
What is the purpose of increasing or decreasing the size of the base in starting positions?
To change stability
Which of the following activities is an example of the Anaerobic: lactic acid system?
400 metre run
What is the purpose of providing adequate fixation of the body in starting positions?
To allow specific movements to be performed with maximum concentration
What is the characteristic of the Aerobic: oxygen system?
Slow steady activity indefinitely
What determines the difficulty of an exercise in a starting position?
The modification of the basic starting position
Study Notes
Metabolic Systems
- The anaerobic (alactic) system uses stored ATP and PC, is used for short bursts of up to 15 seconds, and stops when ATP and PC are depleted (e.g., quick dash).
- The anaerobic (lactic acid) system uses glycogen, is used for fast activity up to 2 minutes, and stops due to lactic acid build-up and oxygen debt (e.g., 400-meter run).
- The aerobic (oxygen) system uses glycogen, fatty acids, and triglycerides, is used for slow, steady activity indefinitely, and stops when exhaustion is reached (e.g., jogging).
Starting Positions
- There are five basic starting positions: lying (supine), kneeling, sitting, standing, and hanging.
- Modifications to these positions can:
- Raise or lower the centre of gravity
- Increase or decrease the size of the base to change stability
- Increase or decrease leverage
- Provide fixation of the body for specific movements
- Increase or decrease muscle work required to maintain the position
- Ensure maximum support for relaxation
Metabolic Systems
- The anaerobic (alactic) system uses stored ATP and PC, is used for short bursts of up to 15 seconds, and stops when ATP and PC are depleted (e.g., quick dash).
- The anaerobic (lactic acid) system uses glycogen, is used for fast activity up to 2 minutes, and stops due to lactic acid build-up and oxygen debt (e.g., 400-meter run).
- The aerobic (oxygen) system uses glycogen, fatty acids, and triglycerides, is used for slow, steady activity indefinitely, and stops when exhaustion is reached (e.g., jogging).
Starting Positions
- There are five basic starting positions: lying (supine), kneeling, sitting, standing, and hanging.
- Modifications to these positions can:
- Raise or lower the centre of gravity
- Increase or decrease the size of the base to change stability
- Increase or decrease leverage
- Provide fixation of the body for specific movements
- Increase or decrease muscle work required to maintain the position
- Ensure maximum support for relaxation
Learn about the anaerobic and aerobic metabolic systems, including the ATP-PC system, lactic acid system, and oxygen system, and how they are used in different exercises and activities.
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