Related Experiment Videos
Locomotion in men has no appreciable mechanical effect on breathing
R B Banzett1, J Mead, M B Reid
1Respiratory Biology Program, Harvard School of Public Health, Boston, Massachusetts 02115.
Summary
Stride mechanics minimally impact breathing during locomotion. Respiratory volume displacement from walking or running is too small to significantly aid respiratory muscles or pulmonary ventilation.
Area of Science:
- Exercise Physiology
- Biomechanics
- Respiratory Physiology
Background:
- Locomotion involves complex interactions between musculoskeletal and respiratory systems.
- Previous theories proposed that stride mechanics significantly assist respiratory muscles during physical activity.
Purpose of the Study:
- To quantify the respiratory volume displacement generated by each stride during walking and running.
- To determine if this displacement contributes meaningfully to pulmonary ventilation.
Main Methods:
- Subjects performed walking and running on a treadmill.
- Flow at the mouth was measured during the gait cycle.
- Respiratory tidal volume was assessed concurrently.
Main Results:
- Stride-induced flow at the mouth represented only 1-2% of respiratory tidal volume.
- This volume displacement was found to be negligible in its contribution to overall breathing.
Conclusions:
- The mechanical effect of stride on breathing is minimal.
- Stride-induced respiratory volume displacement does not provide significant assistance to respiratory muscles during locomotion.