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During the exercise, esophageal temperature (T<jats:sub>es<\/jats:sub>), skin temperature, heart rate (HR), V\u0307e, tidal volume, respiratory frequency (f), respiratory gases, blood pressure (BP), and blood lactate were all measured. We found that oxygen uptake, carbon dioxide output, BP, and blood lactate did not differ among the sessions. T<jats:sub>es<\/jats:sub>, HR, V\u0307e, and f remained nearly constant from minute 10 onward in the T10 session, but all of these parameters progressively increased in the T35 and T45 sessions, and significantly higher levels were seen in the T45 than the T35 session. For all but two subjects in the T35 and T45 sessions, plotting V\u0307e as a function of T<jats:sub>es<\/jats:sub>revealed no threshold for hyperventilation; instead, increases in V\u0307e were linearly related to T<jats:sub>es<\/jats:sub>, and there were no significant differences in the slopes or intercepts between the T35 and T45 sessions. Thus, during prolonged submaximal exercise in the heat, V\u0307e increases with core temperature, and the influences of skin temperature and the rate of increase in T<jats:sub>es<\/jats:sub>on the relationship between V\u0307e and T<jats:sub>es<\/jats:sub>are apparently small.<\/jats:p>","DOI":"10.1152\/japplphysiol.00541.2005","type":"journal-article","created":{"date-parts":[[2005,10,26]],"date-time":"2005-10-26T07:43:25Z","timestamp":1130312605000},"page":"414-420","source":"Crossref","is-referenced-by-count":82,"title":["Relationship between ventilatory response and body temperature during prolonged submaximal exercise"],"prefix":"10.1152","volume":"100","author":[{"given":"Keiji","family":"Hayashi","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yasushi","family":"Honda","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Takeshi","family":"Ogawa","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Narihiko","family":"Kondo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Takeshi","family":"Nishiyasu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"24","reference":[{"key":"R1","doi-asserted-by":"publisher","DOI":"10.1152\/jappl.1992.73.6.2668"},{"key":"R2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1748-1716.1965.tb04073.x"},{"key":"R3","unstructured":"Barltrop D.The relation between body temperature and respiration.J Physiol125: 19P\u201320P, 1954."},{"key":"R4","doi-asserted-by":"crossref","unstructured":"Bazett HC.Studies on the effects of baths on man. 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