Circadian variations in psychophysiological responses to heat exposure and exercise
Ten healthy men were tested at 0600, 1200, 1800 and 2400 hours on different days at rest in a laboratory at room temperature followed by 1 h of heat exposure in a climatic chamber at 42 degrees C, 60% rh (50 min rest and 10 min exercise on a cycle ergometer at 50% VO2max). Heart rate, blood pressure...
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| Veröffentlicht in: | European Journal of Applied Physiology and Occupational Physiology 1989-09, Vol.59 (1-2), p.29-33 |
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| container_title | European Journal of Applied Physiology and Occupational Physiology |
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| creator | ZAHORSKA-MARKIEWICZ, B DEBOWSKI, M SPIOCH, F. M ZEJDA, J SIKORA, A MARKIEWICZ, A |
| description | Ten healthy men were tested at 0600, 1200, 1800 and 2400 hours on different days at rest in a laboratory at room temperature followed by 1 h of heat exposure in a climatic chamber at 42 degrees C, 60% rh (50 min rest and 10 min exercise on a cycle ergometer at 50% VO2max). Heart rate, blood pressure, rectal temperature Tre, metabolic rate, number connection test, visual and auditory reaction time, flicker test and catecholamine excretion were measured. Heat exposure and exercise caused lower heart rate acceleration at 2400 hours than at 0600 and 1200 hours, the smallest increase of Tre at 1800 hours, and an increase in metabolic rate greater at 1200 than at 1800 hours. In the afternoon, when, according to the circadian rhythm, the body temperature is highest, the additional heat load produced the smallest physiological effects. Performance efficiency, after heat exposure combined with physical exercise, improved slightly, but diurnal variations did not show significant circadian rhythm. |
| doi_str_mv | 10.1007/bf02396576 |
| format | Article |
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Psychology</subject><subject>Hot Temperature</subject><subject>Humans</subject><subject>Male</subject><subject>Mental Processes - physiology</subject><subject>Metabolic Clearance Rate</subject><subject>Psychomotor Performance - physiology</subject><subject>Psychophysiology</subject><subject>Vertebrates: anatomy and physiology, studies on body, several organs or systems</subject><subject>Work Capacity Evaluation</subject><issn>0301-5548</issn><issn>1439-6319</issn><issn>1432-1025</issn><issn>1439-6327</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1989</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkE1LxDAQhoMo67p68S70IB6E6uQ7PeriqrDgQT2XNJu6kW5Tk1bcf2_EuldPM8P78MI8CJ1iuMIA8rqqgdBCcCn20BQzSnIMhO-jKVDAOedMHaKjGN8BCBRUTtCEcEUxk1P0PHfB6JXTbfapg9O9823MXJt1cWvWvltvo_ONf3NGN1mwsUuxjVnvs7XVfWa_Oh-HYDPdrtJhg3HRHqODWjfRnoxzhl4Xdy_zh3z5dP84v1nmhoHqcyGBaKwEB4kVFmkh2OCaVUoDLwwXlHLDNWe0qjiVStaYVRWzUlohtRJ0hi5-e7vgPwYb-3LjorFNo1vrh1jKglJQRP4LYiUxVUncDF3-gib4GIOtyy64jQ7bEkP5o7q8XfypTvDZ2DpUG7vaoaPblJ-PuY7JXh10m-zssNRB0s_0G1myhL0</recordid><startdate>19890901</startdate><enddate>19890901</enddate><creator>ZAHORSKA-MARKIEWICZ, B</creator><creator>DEBOWSKI, M</creator><creator>SPIOCH, F. 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| source | MEDLINE; SpringerLink Journals - AutoHoldings |
| subjects | Adult Biological and medical sciences Chronobiology Circadian Rhythm - physiology Exercise - physiology Fundamental and applied biological sciences. Psychology Hot Temperature Humans Male Mental Processes - physiology Metabolic Clearance Rate Psychomotor Performance - physiology Psychophysiology Vertebrates: anatomy and physiology, studies on body, several organs or systems Work Capacity Evaluation |
| title | Circadian variations in psychophysiological responses to heat exposure and exercise |
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