2020
DOI: 10.1007/s00421-020-04493-4
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Hyperthermia and dehydration: their independent and combined influences on physiological function during rest and exercise

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Cited by 11 publications
(4 citation statements)
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“…Each HA intervention provided significant thermal strain, with a similar daily T re of ∼38.4°C maintained throughout each exposure via exercise at a controlled HR. It is possible that the moderate levels of daily dehydration (i.e., ∼3% body mass) did not provide a sufficient stimulus for renal water conservation ( Kenefick et al, 2007 ), and that more pronounced dehydration (i.e., 4–5% of body mass) might enhance sodium reabsorption independently of the levels of whole-body heat stress achieved during HA in the present study ( van den Heuvel et al, 2020 ). Furthermore, similar to controlled hyperthermia HA, where the workload to maintain a T re of 38.5°C in a given environment may be lower when fluid intake is restricted ( Garrett et al, 2014 ), exercising HR was maintained by substantially larger reductions in workload during HA with dehydration (∼30 W or 17% of initial workload, compared to ∼17 W or 9% for euhydrated HA).…”
Section: Discussionmentioning
confidence: 80%
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“…Each HA intervention provided significant thermal strain, with a similar daily T re of ∼38.4°C maintained throughout each exposure via exercise at a controlled HR. It is possible that the moderate levels of daily dehydration (i.e., ∼3% body mass) did not provide a sufficient stimulus for renal water conservation ( Kenefick et al, 2007 ), and that more pronounced dehydration (i.e., 4–5% of body mass) might enhance sodium reabsorption independently of the levels of whole-body heat stress achieved during HA in the present study ( van den Heuvel et al, 2020 ). Furthermore, similar to controlled hyperthermia HA, where the workload to maintain a T re of 38.5°C in a given environment may be lower when fluid intake is restricted ( Garrett et al, 2014 ), exercising HR was maintained by substantially larger reductions in workload during HA with dehydration (∼30 W or 17% of initial workload, compared to ∼17 W or 9% for euhydrated HA).…”
Section: Discussionmentioning
confidence: 80%
“…An a priori sample size estimation was conducted using G * Power (version 3.1.9.6) based on observed changes in SV and Q reported in a recent meta-analysis (Tyler et al, 2016). With an alpha level of 0.05, required power (1-β) of 0.8 and correlation of repeated measures of 0.5, a within-factors ANOVA with 2 groups (HA interventions) and 16 repeated measures (4 experimental trials, each with 4 measurement points) would require a minimum of 6 participants.…”
Section: Statistical Analysesmentioning
confidence: 99%
“…Possible reasons for the lack of significant differences in each case included nonspecific leakage of tubular epithelial HFABP into the tubules because of postmortem changes. In the cases of heat stroke, oliguria due to dehydration should also be considered 31 …”
Section: Discussionmentioning
confidence: 99%
“…Hyperthermia and dehydration are considered important physiological stressors during exercise [25]. Their combined and isolated effects on GSH metabolism have been previously investigated.…”
Section: Discussionmentioning
confidence: 99%