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J Appl Physiol 61: 1149-1152, 1986;
8750-7587/86 $5.00
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Journal of Applied Physiology, Vol 61, Issue 3 1149-1152, Copyright © 1986 by American Physiological Society

ARTICLES

Effects of cognitive and psychomotor tasks on breath-holding span

V. S. Alpher, R. B. Nelson 3rd and R. L. Blanton

Bartlett (J. Appl. Physiol. 42: 717-721, 1977) demonstrated that a psychomotor task (hand dynamometer) extended breath holds at functional residual capacity (FRC) in a manner comparable to Valsalva and Mueller maneuvers. This led us to the hypothesis that distraction of a subject's attention from dyspneic sensations accounted for Bartlett's findings. This hypothesis was tested by comparing a hand dynamometer task (rubber-bulb squeeze) with a mental performance task (mental arithmetic). Results for tasks performed separately and concurrently in a within-subjects design showed comparable effects, without reaching a FRC breath-hold performance ceiling. Implications of results for effects of nonmechanical and nonchemical factors on respiratory drive are discussed.




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