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Respiratory muscle fatigue after marathon running
Summary
Marathon running can lead to respiratory muscle fatigue in healthy individuals. Endurance exercise significantly decreased respiratory muscle strength and endurance after a marathon race.
Area of Science:
- Exercise Physiology
- Respiratory Medicine
Background:
- Respiratory muscle fatigue is known in laboratory and pathological settings.
- Its occurrence in healthy individuals during physiological conditions like endurance exercise remains unclear.
Purpose of the Study:
- To investigate the development of respiratory muscle fatigue in healthy individuals after marathon running.
Main Methods:
- Four runners' spirometry, respiratory muscle strength (PImax, PEmax, PdiIC), and endurance (MVV) were measured before and after a marathon.
- Maximal voluntary ventilation (MVV) was used to assess endurance.
Main Results:
- No significant changes were observed in forced vital capacity, inspiratory capacity, or flow rates post-marathon.
- Significant decreases were noted in maximal inspiratory pressure (PImax), maximal expiratory pressure (PEmax), transdiaphragmatic pressure during inspiratory capacity (PdiIC), and maximal voluntary ventilation (MVV).
Conclusions:
- Marathon running leads to significant decrements in respiratory muscle strength and endurance.
- These findings suggest that respiratory muscle fatigue occurs in healthy individuals following prolonged endurance exercise.