Effects of Post-Exercise Sauna Bathing on 2000-M Rowing Performance and Blood Volumes

Creasy, Robert H.; Hopkins, William G.; Scoon, G; Mayhew, S R; Cotter, James D.

doi:10.1097/00005768-200305001-00184

Cited by 3 publications

(7 citation statements)

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“…The cardiovascular stability was due to increased heat loss rather than lower heat content (~resting core temperature), at the time of day of testing HSTs and this concurs with previous work (Turk and Worsley 1974;Weller and Harrison 2001;Creasy 2002). It is suggested the increased capacity for work observed in the present study and the physiological adaptation to heat stress may have been enhanced by using the controlled hyperthermia technique during acclimation.…”

Section: Effectiveness Of Short-term Acclimation To the Heatsupporting

confidence: 92%

“…The catheter was flushed with saline after sampling. The samples were taken at rest, 30, 60 and 90 min in the HST, and at the same times on days one and five of the acclimation regimes, but with the omission of the 30 min sample (Morel and Doucet 1986;Creasy 2002 (Ramanathan 1964) and b T = 0.9 T re + 0.1 T sk . Temperatures were logged at 60-s intervals (1200 series, Squirrel Grant Instruments, Cambridge, England).…”

Section: Fluid Regulatory and Stress Hormonesmentioning

confidence: 99%

“…It is suggested the increased capacity for work observed in the present study and the physiological adaptation to heat stress may have been enhanced by using the controlled hyperthermia technique during acclimation. This technique increases work stress progressively as the individual adapts to the heat stress conditions (Taylor 2000;Creasy 2002). …”

Section: Effectiveness Of Short-term Acclimation To the Heatmentioning

confidence: 99%

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The Induction and Decay of Short-Term Heat Acclimation

Garrett

Goossens

Rehrer

et al. 2003

Medicine & Science in Sports & Exercise

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Abstract:Most advice for heat adaptation is to use long-term (>10 d) regimes, in which hydration status is maintained. We tested the hypothesis that short-term (5-day) heat acclimation would confer substantial improvements in physiological strain and exercise tolerance for exercise in the heat, and fluid regulatory strain provides a thermally-independent stimulus for such adaptations. Ten moderately-fit males were heat acclimated using controlled hyperthermia (rectal temperature 38.5°C) for 90 min on five consecutive days (T a = 40°C, 60% RH), on two occasions separated by a five-week washout, in a randomly assigned, cross-over design; one with euhydration (EUH) and one with dehydration (DEH) during acclimation bouts. One week before, then on the 2 nd day after each acclimation regime, a heat stress test (HST) was completed, comprising cycling at 40% peak power output for 90 min (T a = 35°C, 60% RH), before incrementing to exhaustion. Plasma volume (PV) at rest was measured using CO rebreathing. Acclimation exercise-induced response of In conclusion, short-term (5-day) heat acclimation was effective with several adaptations more pronounced after fluid-regulatory strain from a dehydration acclimation regime.

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Section: Effectiveness Of Short-term Acclimation To the Heatsupporting

confidence: 92%

Section: Fluid Regulatory and Stress Hormonesmentioning

confidence: 99%

Section: Effectiveness Of Short-term Acclimation To the Heatmentioning

confidence: 99%

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The Induction and Decay of Short-Term Heat Acclimation

Garrett

Goossens

Rehrer

et al. 2003

Medicine & Science in Sports & Exercise

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“…The intention was to maximize cardiovascular and thermal strain while already warmed and vasodilated by the training bout. Scoon et al 95 observed expanded plasma volume (Evans Blue dye), which correlated closely with a modest but meaningful improvement in running performance, whereas Creasy et al 117 found no such benefits on hypervolemia (CO dilution) or performance in highly-trained rowers when tested 2, 5 and 9 d following heat acclimation. The reason for the different outcomes from these studies is unknown, but it is noted that running for ∼15 min and rowing for <7 min place different demands on the cardiovascular system in regard to orthostatic stress and oxygen delivery to exercising muscle.…”

Section: Introductionmentioning

confidence: 99%

“… — Morrison et al 92 10 male cyclists, Crossover ? 65 10.5 (7*90) Matched RPE: continuous and intervals 37°C, 50% “Drinking encouraged” Seated Cycling ↑ 1.6 (−1 – 4) 40-km TT ↑ 0.4% (−1.5 – 2.2) — Creasy et al 117 9 male rowers, Crossover 42 ? 7.8 (15*31) To tolerance, after training 84°C (sauna) Ad lib ∼ +0.25% Seated ↑ 4 (0 – 9) 2-km TT -1.2% ↓ (−4.1 – 1.7) — Hue et al 123 Competitive swimmers6 tropical train, 6 altitude train and 4 taper train ?…”

Section: Introductionmentioning

confidence: 99%

Heat stress and dehydration in adapting for performance: Good, bad, both, or neither?

et al. 2016

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Physiological systems respond acutely to stress to minimize homeostatic disturbance, and typically adapt to chronic stress to enhance tolerance to that or a related stressor. It is legitimate to ask whether dehydration is a valuable stressor in stimulating adaptation per se. While hypoxia has had long-standing interest by athletes and researchers as an ergogenic aid, heat and nutritional stressors have had little interest until the past decade. Heat and dehydration are highly interlinked in their causation and the physiological strain they induce, so their individual roles in adaptation are difficult to delineate. The effectiveness of heat acclimation as an ergogenic aid remains unclear for team sport and endurance athletes despite several recent studies on this topic. Very few studies have examined the potential ergogenic (or ergolytic) adaptations to ecologically-valid dehydration as a stressor in its own right, despite longstanding evidence of relevant fluid-regulatory adaptations from short-term hypohydration. Transient and self-limiting dehydration (e.g., as constrained by thirst), as with most forms of stress, might have a time and a place in physiological or behavioral adaptations independently or by exacerbating other stressors (esp. heat); it cannot be dismissed without the appropriate evidence. The present review did not identify such evidence. Future research should identify how the magnitude and timing of dehydration might augment or interfere with the adaptive processes in behaviorally constrained versus unconstrained humans.

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