Simultaneous experimental acclimatization to heat and cold in man

Glaser, E. M.; Shephard, Roy J.

doi:10.1113/jphysiol.1963.sp007282

Cited by 33 publications

(16 citation statements)

References 13 publications

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“…Glaser & Shephard (4) clearly showed that hand skin temperatures fell progressively less during succes-sive exposure to cold (air temperature 3-6°C) in lightly clad, resting subjects, averaging 15.5°C on the 11th day. This hand skin temperature is about 5°lower than that measured for six of our subjects during work.…”

Section: Discussionmentioning

confidence: 99%

Reactions to hand cooling in workers occupationally exposed to cold.

Enander¹,

Sköldström²,

Holmér³

1980

Scand J Work Environ Health

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ENANDER A, SKOLDSTROM B, HOLMER I. Reactions to hand cooling in workers occupationally exposed to cold. Scand j work environ health 6 (1980) 58-65. Ten men occupationally exposed to cold and ten office workers participated in the study. Reactions to immersion of the hands in cold water (+ lOoC) for 2 min were studied during the following 30 min at two different ambient temperatures, 10 and 20 o C. Hand skin temperature was recorded in thermograms, and the subjects rated cold sensation and pain. Considerable interindividual differences in hand skin temperature reaction were found in both groups. On the average the occupationally exposed workers had a somewhat higher hand skin temperature than the office workers during the recovery period in the lOoC ambient temperature, although the difference did not reach significance. The office workers rated significantly greater cold sensation as a result of the cold immersion, especially during an ambient temperature of lOoC, and the frequency of pain ratings was higher for this group. The results suggest that cooling among the occupationally exposed workers at work was not severe enough to produce physiological adaptations, although some psychological adaptation was indicated.

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Section: Discussionmentioning

confidence: 99%

Reactions to hand cooling in workers occupationally exposed to cold.

Enander¹,

Sköldström²,

Holmér³

1980

Scand J Work Environ Health

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“…The mechanism of WT-induced improvement of mental QOL in patients with CHF remains unclear, but a previous study reported that 4-week WT diminished appetite loss and subjective complaints in mildly depressed patients. 31) Mild warming of the whole body exhibits sedative effects through sensory nerve endings, 19) and increased plasma levels of β-endorphin. 20,21) There was a negative correlation between the changes in MC and systolic blood pressure before starting WT (Table III), ie, patients with lower systolic blood pressure at baseline received greater improvement of MC by WT.…”

Section: Discussionmentioning

confidence: 99%

“…13,14) Depression was found to be related to reduced heart rate variability, 15) blunted baroreflex sensitivity, 16) and heightened sympathetic nervous activity, 17) while WT restored autonomic imbalance in CHF patients who were associated with sympathetic activation and parasympathetic withdrawal. 18) Mild warming exhibited sedative effects through the sensory nerve endings, 19) and thermal stimulus enhanced plasma levels of β-endorphin. 20,21) Accordingly, the present study aimed to investigate whether WT could improve QOL in CHF patients in addition to improving cardiac function and exercise capacity.…”

mentioning

confidence: 99%

Waon Therapy Improves Quality of Life as Well as Cardiac Function and Exercise Capacity in Patients With Chronic Heart Failure

et al. 2015

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SummaryWaon therapy (WT), which in Japanese means soothing warmth, is a repeated sauna therapy that improves cardiac and vascular endothelial function in patients with chronic heart failure (CHF). We investigated whether WT could improve the quality of life (QOL) of CHF patients in addition to improving cardiac function and exercise capacity.A total of 49 CHF patients (69 ± 14 years old) were treated with a 60°C far infrared-ray dry sauna bath for 15 minutes and then kept in a bed covered with blankets for 30 minutes once a day for 3 weeks. At baseline and 3 weeks after starting WT, cardiac function, 6-minute walk distance (6MWD), flow mediated dilation (FMD) of the brachial artery, and SF36-QOL scores were determined.WT significantly improved left ventricular ejection fraction (LVEF), B-type natriuretic peptide (BNP), 6MWD, and FMD (3.6 ± 2.3 to 5.1 ± 2.8%, P < 0.01). Moreover, WT significantly improved not only the physical (PC) but also mental component (MC) of the QOL scores. WT-induced improvement of PC was negatively correlated with changes in BNP (r = -0.327, P < 0.05), but MC improvement was not related directly to changes in BNP, LVEF, or 6MWD. WT-induced changes in MC were not parallel to PC improvement.WT improved QOL as well as cardiac function and exercise capacity in patients with CHF. Mental QOL improved independently of WT-induced improvement of cardiac function and exercise capacity. (Int Heart J 2015; 56: 203-208)

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“…Evidence of adaptation was seen in the Korean Ama pearl divers (Hong et al 1987) and bushmen exposed to the cold nights of the Australian desert (Hammel et al 1959). Eric Glaser and I also established that it was possible to acclimatize to hot and cold conditions simultaneously (Glaser and Shephard 1963), with the subjects feeling more comfortable and shivering less under cold conditions. The body temperatures of those who have been acclimatized often drop to lower temperatures than in those who are not accustomed to cold conditions, suggesting that much of the apparent benefit may be no more than habituation to various unpleasant sensations.…”

Section: Exercise Under Cold Conditionsmentioning

confidence: 96%

The Post-Modern Era: Chronic Disease and the Onslaught of a Sedentary Lifestyle

Shephard

2014

Studies in History and Philosophy of Science

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Simultaneous experimental acclimatization to heat and cold in man

Cited by 33 publications

References 13 publications

Reactions to hand cooling in workers occupationally exposed to cold.

Reactions to hand cooling in workers occupationally exposed to cold.

Waon Therapy Improves Quality of Life as Well as Cardiac Function and Exercise Capacity in Patients With Chronic Heart Failure

The Post-Modern Era: Chronic Disease and the Onslaught of a Sedentary Lifestyle

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