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Respiratory capacities are crucial indicators of lung function, representing the maximum amount of air an individual's respiratory system can handle during various breathing phases.
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Locomotor-Respiratory Entrainment upon Phonated Compared to Spontaneous Breathing during Submaximal Exercise.

Maja Marija Potočnik1, Ian Edwards2, Nejka Potočnik3

  • 1Departmenet of Anasthesiology and Intensive Therapy, University Medical Center, 1000 Ljubljana, Slovenia.

International Journal of Environmental Research and Public Health
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Summary

Phonation during exercise can alter breathing patterns and perceived exertion. Locomotor-respiratory entrainment, not expiratory resistance from phonation, appears to enhance exercise performance in healthy adults.

Keywords:
increased expiratory pressurelocomotor–respiratory couplingpeak expiratory flowphonationventilatory efficiency

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Area of Science:

  • Exercise Physiology
  • Respiratory Physiology
  • Biomechanics

Background:

  • Breathing techniques during exercise are gaining attention for their ergogenic potential.
  • The impact of phonation (vocalizing) on exercise responses remains understudied.

Purpose of the Study:

  • To investigate the respiratory, metabolic, and hemodynamic effects of phonated exhalation.
  • To examine the influence of phonation on locomotor-respiratory entrainment during moderate exercise.

Main Methods:

  • Twenty-six healthy adults performed moderate cycling under three breathing conditions: spontaneous, "h" phonation, and "ss" phonation.
  • Measurements included respiratory, metabolic, hemodynamic variables, and perceived exertion.
  • Locomotor-respiratory frequency coupling was analyzed.

Main Results:

  • Phonation reduced peak expiratory flow, respiratory rate, and perceived exertion.
  • Phonation altered dominant locomotor-respiratory coupling patterns (e.g., 1:4 vs. 1:3).
  • Ventilatory efficiency improved with dominant locomotor-respiratory coupling, irrespective of breathing pattern.

Conclusions:

  • Phonation is a novel tool for manipulating expiratory flow during exercise.
  • Locomotor-respiratory entrainment, rather than expiratory resistance from phonation, appears to be the primary driver of ergogenic enhancement.
  • Phonation may hold potential for improving exercise tolerance in conditions like COPD or enhancing respiratory efficiency at higher exercise intensities.