How hyperventilation perturbs posture?

The goal of this study was to establish how increased ventilation modifies postural stability, as characterized by body sway. Six healthy subjects were asked to stand upright under two hyperventilation conditions: a metabolic hyperventilation induced by an incremental cycling exercise test and a vol...

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Bibliographic Details
Main Authors: David, Pascal, Mora, Isabelle, Petitjean, Michel
Format: Conference Proceeding
Language:English
Subjects:
Life Sciences
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Summary:The goal of this study was to establish how increased ventilation modifies postural stability, as characterized by body sway. Six healthy subjects were asked to stand upright under two hyperventilation conditions: a metabolic hyperventilation induced by an incremental cycling exercise test and a voluntary hyperventilation of 3 min imposed by a metronome with a respiratory frequency corresponding to the first ventilatory threshold. Recordings were obtained with eyes open, with the subjects standing on a force plate over 30-s periods. Movement of the centre of pressure in the sagittal plane was monitored in the time domain. Ventilatory parameters were measured with a portable, telemetric device. The results showed a strong correlation between the sway path and the degree of mobilization of the vital capacity. Thus, these results suggest that ventilation may be an important factor in postural disturbance during physical activity. Further investigations are needed to identify the strategies used by postural control to compensate these ventilatory perturbations.
ISSN:1381-3455