Anaerobic Power and Capacity

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Anaerobic Power and Capacity
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Anaerobic Power and Capacity
Lets discuss these!
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Predicting Max Anaerobic Power Capacity

• The capacity for non-mitochondrial (anaerobic)
  ATP regeneration is impossible to measure
  accurately
• limited research has been completed on the
  ability/capacity of skeletal muscle to regenerate
  ATP by reactions independent of O2 (anaerobic)

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Predicting Max Anaerobic Power Capacity

• Due to this, several laboratory tests have been
  developed
• completion requires reliance on anaerobic ATP
  regeneration
• indirectly provide a measure of the anaerobic
  capacity

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Predicting Max Anaerobic Power Capacity
Short-Term Tests Intermediate-Term Tests
Sargeants Jump and Reach Wingate Test
Margaria Power Test Isokinetic
Tests Accumulated Oxygen Deficit
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Predicting Max Anaerobic Power Capacity

• These tests have been designed to measure
• Anaerobic capacity or Anaerobic power
• Anaerobic capacity
• reflects the bodys ability to derive energy from
  the combination of glycolysis and phosphagen
  system
• Anaerobic power
• reflects the bodys ability to utilize the
  phosphagen system to regenerate ATP

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Anaerobic Power Testing

• Margaria Power Test (MPT)
• earliest and most practical tests of anaerobic
  power
• developed by Margaria in the early 1960s
• later modified by Kalamen
• MPT
• requires subjects of a known wt to run up a
  staircase
• 1.75 vertical meters
• take 2-3 steps at a time after sprinting 6 meters
• time required to cover the known height at a
  known weight was recorded and power could then be
  calculated

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Anaerobic Power Testing

• Isokinetic exercise testing
• muscle generates force throughout given ROM
• velocity or speed of contraction is constant
• resistance is proportional to development of
  torque
• Torque force around a given axis
• max torque is generated throughout total ROM
• Measure max torque at given velocities
• Measure force decrement for given reps
• can give us an indirect measure of motor unit
  types

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Anaerobic Power Testing

• Wingate Anaerobic Power Test
• developed in 1970s at the Wingate Institute in
  Israel
• cycle ergometer test
• used to determine peak muscle power
• indirectly measure anaerobic capacity
• requires subjects to pedal at max effort for 30
  sec
• load is constant calculated as a percentage of
  BW
• since the time period is short
• researcher believe it is a better test of
  anaerobic power
• not capacity like it was originally designed to
  test

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Anaerobic Power Testing

• Wingate Anaerobic Power Test
• best evidence for this contention
• CP found to be much lower than muscle glycogen
• following a Wingate test
• shows that glycolytic metabolism not greatly
  utilized
• anaerobic system not fully taxed due to short
  time period

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Wingate Test Methods

• Start with 5-min warm-up period
• pedal to max rpm level 3 times during this period
• Testing
• set appropriate amount of resistance on the
  ergometer
• multiply body weight in kgs by .075 kg/kg BW to
  get load
• original Wingate Test
• Men .083 - .092 kg/kg BW
• Women .075 kg/kg BW

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Wingate Test Methods

• Testing
• subject begins pedaling up to max rpm level
• bike is unloaded
• subjects signal when max rpm is reached
• immediately set resistance by locking belt
• At end of 30 sec
• unload wheel and allow the subjects a brief
  cool-down period
• Variables to look at
• Peak power, Mean power, Decrement in power

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Wingate Test

• Wingate can be used to indirectly identify the
  predominance of FT and ST motor units
• look at peak power output and decrement over
  time
• Individuals with a high of FT motor units
• will generate a greater power output
• power output will decrease more greatly over time
  
• due to fatigability of FT motor units
• Training program effectiveness can also be
  evaluated
• effectiveness of high, explosive power training
• evaluate changes in maximal power output before
  and after
• effectiveness of endurance training
• change in decrement of power over time
• upward shift of the power output curve

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Wingate test
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Anaerobic Capacity Testing

• Accumulated oxygen deficit (AOD)
• argued to better reflect
  anaerobic capacity
• Procedure
• Perform 4-5 submax
  exercise bouts at
  different intensities
• Measure VO2max
• Extrapolate out to 120
  VO2max to predict
  workload for AOD test
• theoretical O2 cost

5.15 L/min
393 Watts
Approximately 120 VO2max
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AOD methodology

• Procedure
• high-intensity exercise
  bout to cause fatigue in 2-5 min
• deficit is highest within this time period
• measure VO2 in this bout
• subtract this value from the theoretical O2 cost

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Sprinters tested highest in AOD which may add
some degree of validity to the measure!
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Limitations of AOD

• Steady-state VO2-Watts linear regression
• AOD dependent on accuracy of this relationship
• must be strict in determining steady-state
• Cycling efficiency
• assume efficiency during cycling
  remains consistent
• during steady-state and
  non steady-state

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Running Economy
VO2 0.35 0.0113 (Watts)
Figure 13.6