Respiration During Exercise Chapter 10
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Respiration During Exercise
Chapter 10
Terms
Ventilation
Respiration
Pulmonary respiration
Cellular respiration
Ventilation
Inspiration
Diaphragm (rest and exercise)
External intercostal muscles (exercise)
Others (exercise)
Expiration
Internal intercostal muscles (exercise)
Abdominal muscles (exercise)
FYI
FYI
Structure of the Respiratory System
Conducting Zone
Respiratory Zone
Alveoli
FYI
Respiration
PO2 inside the venous blood = 40
PO2 inside the alveoli = 100
Therefore, O2 flows from the high pressure (lungs) to the low pressure (blood)
PO2 inside the arterial blood = 100
PO2 = 40
PO2 = 100
PO2 = 100
Respiration
PO2 = 100PCO2 = 40
7
PO2 = 40
Pulmonary Respiration
Cellular Respiration
Oxygen Saturation
97%Saturation
The Pulmonary System & Exercise
Control of Ventilation
CO2 CO2
Ventilation & Steady State Exercise
Ventilation & Maximal Exercise
Note the non-linear increase
in ventilation
Ventilation Threshold
CO2 from Krebs cycle stimulates
ventilation
CO2 from Krebs cycle and buffering
lactic acid stimulate ventilation even
faster
Aerobic Aerobic andAnaerobic13
Ventilatory & Lactate Thresholds
Exercise “Talk Test”
Ventilation & Exercise
Does the pulmonary system limit exercise performance?
Fatigue of respiratory muscles
> 80% of max and longer than 10 min
Exercise-induced hypoxemia
Training
20-30% decrease
Training
Do the lungs adapt to exercise training?
Do the respiratory muscles adapt to exercise training?
Pulmonary Diseases
Exercise induced asthma
Chronic obstructive lung disease (COPD)
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