Effet d’une situation d’apnée statique sur les capacités individuelles d’estimation du temps

Abstract : Introduction. – Apnea is known to induce specific physiological adaptation in order to protect brain and heart from hypoxia. During apnea, ability to accurately estimate time is the main factor to keep watch over it in order to perform safely. Therefore, the present study aimed to analyse the effect of static apnea on internal clock processes. Fact synthesis. – As expected, continuous heart rate monitoring appeared to be a good marker of biological activity. Five trials of time production (20 s) were performed by the subjects, in a sitting position using a chronometer. Time production was studied during three experimental conditions: at rest before static apnea, during five short static apneas (less than 1 min) and at rest after static apneas. Compared to rest, static apnea induced a bradycardia and an underestimation of time interval. Conclusion. – As previously reported in the literature, time processes and biological activity seemed to be connected. The apneic bradycardia could reflect a decrease in biological activity (primarily in order to decrease oxygen uptake) which might consequently influence time estimation mechanisms. If subjects underestimate time during static apnea, then any additional time spent in breath-hold condition could increase oxygen deficit and therefore lead to free diving accident.
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Contributor : Pierre Fontanari-Bastide <>
Submitted on : Wednesday, June 13, 2018 - 12:08:57 PM
Last modification on : Wednesday, May 22, 2019 - 3:36:05 PM

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T Jamin, F. Joulia, P. Fontanari, M Bonnon, C Ulmer, et al.. Effet d’une situation d’apnée statique sur les capacités individuelles d’estimation du temps. Science & Sports, Elsevier 2004, 19 (3), pp.142-144. ⟨10.1016/S0765-1597(03)00169-2⟩. ⟨hal-01808484⟩

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