respiration during exercise. terms ventilation respiration pulmonary respiration cellular...
DESCRIPTION
Ventilation Respiratory Muscles Inspiration Diaphragm (rest and exercise) External intercostal muscles (exercise) Others (exercise) Expiration Internal intercostal muscles (exercise) Abdominal muscles (exercise) FYITRANSCRIPT
Respiration During Exercise
Terms
• Ventilation
• Respiration
• Pulmonary respiration
• Cellular respiration
Ventilation
• Respiratory Muscles• Inspiration
• Diaphragm (rest and exercise)• External intercostal muscles (exercise)• Others (exercise)
• Expiration• Internal intercostal muscles (exercise)• Abdominal muscles (exercise)
FYI
Structure of the Respiratory System
•Conducting Zone
•Respiratory Zone•Alveoli
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
Sea level = 97%
Saturation
Mount Everest = 48%
Saturation
The Pulmonary System & Exercise
Control of Ventilation
CO2 CO2
Ventilation & Steady State Exercise
Ventilation & Graded Exercise
Note the non-linear
Note the non-linear
increaseincrease
in ventilation
in ventilation
Ventilation Threshold
CO2 from Krebs cycle stimulates
ventilation
CO2 from Krebs cycle and
buffering lactic acid stimulate
ventilation even faster
Aerobic Aerobic andAnaerobic1
3
Ventilatory & Lactate Thresholds
Exercise “Talk Test”
3 4 5 6 7 8 9 10 11 mph
Ventilation & Exercise
• Does the pulmonary system limit exercise performance?
• Untrained - fatigue of respiratory muscles
• Trained - greater than 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?Respiratory Muscles
InspirationDiaphragm (rest and
exercise)External intercostal
muscles (exercise)Others (exercise)
ExpirationInternal intercostal
muscles (exercise)Abdominal muscles
(exercise)
Pulmonary Diseases
• Exercise induced asthma
• Chronic obstructive lung disease (COPD)