Abstract
We investigated the influence of face fanning on autonomic regulation containing tympanic temperature (Tty) and cardiovascular responses in intermittent exercise in the Kendo protector masked humans. Subjects repeated cycle work (at 185 W) and rest for 42 min in a thermoneutral (28°C and rh; 45%). The subjects underwent trial with fanning in the first half (FFH) or the latter half (FLH) in the experimental period. We measured Tty, skin blood flow (SkBF), heart rate (HR), systolic (SBP) and diastolic (DBP) blood pressures. Mean arterial pressure (MAP) was calculated as (SBP+2×DBP)/3. Rate of pressure product (RPP) and cutaneous vascular conductance (CVC) calculated HR × SBP and SkBF divided by MAP, respectively. Change of Tty was significantly different among the trials or with and without the fanning. HR in the FFH was significantly lowered with the fanning, as compared without the fanning. In the FFH, RPP and MAP decreased significantly with the fanning. SkBF during intermittent work was not significantly different, and the CVC between the FFH and the FLH was similar in the two trials. The present results suggest that facial fanning is partially reduced thermal and cardiovascular strains during intermittent-severe work in the masked humans. [J Physiol Sci. 2007;57 Suppl:S181]
