Physiology during exercise

7 important questions on Physiology during exercise

Creatine phospate (CP)

- Short-term resupply of ATP comes from the creatine phosphate (CP), which is present in muscles
- White (glycolytic) muscles contain a relatively large quanity of CP
- Red (oxidative) muscles have a relativley restricted quanity  

Creatine phosphokinase (CPK)

-CP and free ATP are in a dynamic equilibrium in which the enzyme creatine phosphokinase (CPK) facilitates a fast recovery of the equilibrium

Changes in lung ventilation during excercise

- An abrupt increase in Ventilation shows at the start of the exercise
- It gradually increases to a consistent level (plateau)
- At the end of the exercise the recovery phase occurs, characterized by an abrupt decrease in ventilation
- Finally, a gradual recovery follow.
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Stethosocpe: What reflectthe end of the sounds you hear?

- In the beginning is the sounds of the systolic blood pressure
- The end of the sounds reflect the diastolic blood pressure 

Increasing power output

- The systolic blood pressure increases
- The diastolic blood pressure remains similar

Increase in heart rate during exercise

- both sympathetic and the parasympathetic nervous sytem changes
- parasympathetic inhibits the SA node

Difference in heart rate between trained and untrained

- The maximum heart rate is independent of training
- Maximum heart rate is estimated at 220 minus your age at years
- It is expected that trained individuals reach their maximum heart rate at higher oxygen consumption level

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