Muscle Fatigue and Energy Needs

1
Muscle Fatigue and Energy Needs
2
Energy Pathways - Aerobic and Anaerobic
Metabolism

• Aerobic- is an adjective that means "requiring
  air", where "air" usually means oxygen
• Anaerobic - is an adjective word which literally
  means without air (where "air" is generally used
  to mean oxygen), as opposed to aerobic.

3
Energy Pathways - Aerobic and Anaerobic Metabolism

• These two types of metabolism are used in
  different ways.
• If the body is working intensely and using a lot
  of energy over a short amount of time the
  Anaerobic path way is used
• If the body is working over long periods of time
  the Aerobic path way is used.

4
ATP

• ATP is the energy source which the body uses to
  fuel movement
• This made in two ways
• During Aerobic work ATP is created with Oxygen
  from blood
• During Anaerobic work blood can not get to the
  muscles fast enough so ATP is created with out
  oxygen (this however can not be sustained over
  long periods of time).

5
Conditioning

• One can train or condition the body to use these
  different pathways better or more effectively
• Ex. Long distance running
• Ex. Weight Lifter

6
Blood transfusions

• Often times athletes will undergo blood
  transfusions. With what you learned from this
  class how would this be helpful to them?