Note 22: Fysiologisk tilpasning til arbejde

Træning kræver at de fleste af kroppens organsystemer arbejder sammen

Force, Work, Energy & Power

We Store Fuel for Exercise in 3 Different "Tanks"

 Fuel  Amount Stored:
Time
 Amount Stored:
Distance
Rate of Use
(Power)
 ATP & CP enough for about
10 sec
enough to go
about 100 yards
 fastest
 Carbohydrates
(glycogen)
 enough for about
2hrs
 enough to go
about 20 miles
glycolysis medium fast;respiration slower
 Lipids
(triglycerides)
 enough for about
40days
 enough to go
about 1000 miles
 very slow

Exercise Creates a Demand for Fuel and O2

In Exercise Both Tidal Volume and Respiratory Frequency Increase

Both Stroke Volume and Heart Rate Go Up, Increasing Cardiac Output

Vasoconstriction and Vasodilation are Used to Shift the Circulation

 Tissue

 Rest L/min

 Exercise L/min
 Viscera & Other

 5.1

 3.0
 Muscle & Heart

 0.9

 27.0
 Total

 6.0

 30.0


Metabolism in the Muscle Cells Can Increase as Much as 100X in Exercise

O2 Delivery in the Tissues is Promoted by Acid Conditions (Bohr Effect)

Increased Blood Flow to the Skin and Sweating Help to Get Rid of Excess Heat

 

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