energy transfer in exercise
Download
Skip this Video
Download Presentation
Energy Transfer in Exercise

Loading in 2 Seconds...

play fullscreen
1 / 21

Energy Transfer in Exercise - PowerPoint PPT Presentation


  • 393 Views
  • Uploaded on

Energy Transfer in Exercise. Immediate Energy. ATP-CP stored in muscle sprints heavy weightlifting events < 10-15 seconds. Short-Term Energy. Lactic Acid Anaerobic Glycolysis  LA Intermediate energy source Maximal intensity for 60-180 seconds 400 meter run 100 meter swim.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Energy Transfer in Exercise' - Melvin


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
immediate energy
Immediate Energy
  • ATP-CP stored in muscle
  • sprints
  • heavy weightlifting
  • events < 10-15 seconds
short term energy
Short-Term Energy
  • Lactic Acid
  • Anaerobic Glycolysis  LA
  • Intermediate energy source
  • Maximal intensity for 60-180 seconds
  • 400 meter run
  • 100 meter swim
blood lactate concentration

Blood Lactate Concentration

25

50

75

100

Percent VO2 max

Blood Lactate Concentration

Untrained Threshold

Untrained

Trained

Trained Threshold

factors related to lactate threshold
Factors Related to Lactate Threshold
  • Low tissue O2 (hypoxia)
  • Dependence on glycolysis
  • Activation of FT muscle fibers
  • Reduced ability to remove lactate
training the lactate threshold
Training the Lactate Threshold
  • Training can  threshold by 20-30%
  • genetics
  • training effect of producing less LA
  • training effect of more efficient LA removal
long term energy

20

15

Trained

10

Untrained

5

0

4

6

8

2

Exercise Time (min.)

Long-Term Energy

Oxygen Uptake (ml / kg-min)

steady state rate
Steady State/Rate
  • Initiation of Exercise
  • O2 uptake rises exponentially
  • Plateau is reached between 3-4 minutes
oxygen deficit
Oxygen Deficit
  • Quantity of O2 that would have been consumed had steady state been reach immediately
oxygen deficit10
Oxygen Deficit
  • Endurance training  reach steady-state sooner  total O2 consumption is    anaerobic component
vo 2 max
VO2max
  • With progressively demanding aerobic exercise, region where O2 uptake plateaus
  • Represents an individual’s capacity for aerobic resynthesis of ATP
  • Helps determine one’s ability to sustain high intensity exercise for longer than 4-5 minutes
energy spectrum13
Energy Spectrum

100

Percent of Total Energy Yield

50

10

60

30

Maximal Exercise Time (minutes)

o 2 dept
O2 Dept

O2 requirement

O2 deficit

O2 Dept

O2 Consumption

Steady-state O2 consumption

Resting O2 consumption

Start Exercise

End Exercise

End Recovery

Exercise Time

classic o 2 dept epoc theory
Classic O2 Dept (EPOC) Theory
  • Fast component – represents O2 required to rebuild ATP and CP
  • Slow component – removal of tissue lactate via conversion to glycogen or oxidation to CO2 and H2O
contemporary epoc theory
Contemporary EPOC Theory
  • Short duration, light to moderate exercise 
  • Recovery O2 serves to replenish high-energy phosphates (several minutes
contemporary epoc theory17
Contemporary EPOC Theory
  • Longer duration, high intensity aerobic exercise 
  • Much longer period of O2 uptake
  • Some used for lactate  glycogen
causes of epoc following heavy exercise
Causes of EPOC following Heavy Exercise
  • Resynthesize ATP and CP
  • Resynthesize lactate to glycogen
  • Oxidate lactate in energy metabolism
  • Restore O2 to blood
  • Thermogenic effects of elevated core temp.
  • Thermogenic effects of hormones
  • Effects of  HR, ventilation, & other functions.
recovery
Recovery
  • Steady state aerobic exercise or 5 to 10 second bouts of maximal exercise  not lactate accumulation  recovery is rapid
  • Fast component
recovery20
Recovery
  • Longer periods of anaerobic exercise 
  • Lactate accumulation
  • Fast and slow components
recovery21
Recovery
  • Exercise at 50% of VO2max can be continued at steady-state w/o build up
  • At 60-75% of VO2max – no steady-state  lactate accumulates
  • Lactate removal is accelerated by aerobic exercise
ad