The acute effects of passive heating on endothelial function, muscle microvascular oxygen delivery, and expression of serum HSP90α

Didier, Kaylin D.; Hammer, Shane M.; Alexander, Andrew M.; Rollins, Korynne S.; Barstow, Thomas J.

doi:10.1016/j.mvr.2022.104356

Cited by 5 publications

(11 citation statements)

References 36 publications

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“…(42) demonstrated that increasing esophageal temperature by ~1.3°C via a water-perfused suit and isolated forearm heating, which clamped skin temperature at ~38°C improved brachial artery flow-mediated dilation in young men. These adjustments seem to persist well beyond the initial recovery phase as Didier and colleagues (36) demonstrated recently that brachial artery flow-mediated dilation was augmented in young adults for 24 h after whole-body hot water immersion. However, these findings are not universal as Brunt et al .…”

Section: Cardiovascular Adjustments In Recovery From Acute Heat Exposurementioning

confidence: 77%

“…Interestingly, they also reported an absence of a hypotensive response after sauna exposure, despite an increase in rectal temperature of ~1.2°C. Finally, Didier and colleagues (36) reported that systolic, diastolic, and mean arterial pressure did not differ from baseline in young adults when measured 24 h after whole-body hot water immersion (Δ rectal temperature of 1.2°C). Combined, these studies provide evidence suggesting that the adjustment in arterial blood pressure that occurs after acute heat exposure is not universal and may vary depending on the intensity, duration, and the population being studied.…”

Section: Cardiovascular Adjustments In Recovery From Acute Heat Exposurementioning

confidence: 96%

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Cardiovascular Adjustments After Acute Heat Exposure

Romero

Richey

Hemingway

2022

Exercise and Sport Sciences Reviews

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Section: Cardiovascular Adjustments In Recovery From Acute Heat Exposurementioning

confidence: 77%

Section: Cardiovascular Adjustments In Recovery From Acute Heat Exposurementioning

confidence: 96%

Cardiovascular Adjustments After Acute Heat Exposure

Romero

Richey

Hemingway

2022

Exercise and Sport Sciences Reviews

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“…Indeed, some evidence suggests that popliteal artery FMD is increased 24 h after 60 min of hot water immersion (Didier et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

The acute effect of heat exposure on forearm macro‐ and microvascular function: Impact of measurement timing, heating modality and biological sex

Chaseling

Debray

Gravel

et al. 2022

Experimental Physiology

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New Findings What is the central question of this study?Do measurement timing, heating modality and biological sex modulate the acute effect of heat exposure on brachial artery flow‐mediated dilatation and postocclusion reactive hyperaemia? What is the main finding and its importance?The acute effect of heat exposure on brachial artery flow‐mediated dilatation and postocclusion reactive hyperaemia is: (1) transient and short lasting; (2) different between forearm and whole‐body heating; (3) unaffected by forearm heating during whole‐body heating; and (4) not different but not always equivalent between males and females. These findings provide a useful basis for future studies to investigate the acute effect of heat exposure on vascular function. Abstract The aim of this study was to gain a better understanding of the acute effect of heat exposure on brachial artery flow‐mediated dilatation (FMD) and postocclusion reactive hyperaemia (PORH) by: characterizing the time course of changes post‐heating; comparing forearm and whole‐body heating; determining the impact of forearm heating during whole‐body heating; and comparing males and females. Twenty adults (11 males and nine females; 28 ± 6 years of age) underwent two forearm [10 min electric blanket (EB) or 30 min hot water immersion (WI)] and two whole‐body [60 min water‐perfused suit with forearm covered (WBH‐C) or uncovered (WBH‐U)] heating modalities. The FMD and PORH were measured before and after (≤5, 30, 60, 90 and 120 min) heating. The FMD increased from baseline 30 min after EB, and 30 and 90 min after WI. In contrast, FMD decreased from baseline immediately after both WBH modalities. Peak PORH increased immediately after WI and both WBH modalities. Total PORH did not differ after WI, whereas it decreased immediately after both WBH modalities. Covering the forearm during WBH did not alter acute changes in FMD or PORH. Changes in FMD and PORH did not differ statistically between males and females during each heating modality, although the observed differences could not always be considered equivalent. These results demonstrate that the acute effect of heat exposure on brachial artery FMD and PORH is: (1) transient and short lasting; (2) different between forearm heating and WBH; (3) unaffected by direct forearm heating during WBH; and (4) not different but not always equivalent between males and females.

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“…Based on previous investigations, 7,31,33,38 a power analysis (G*Power v.3.1.9.7, Düsseldorf, Germany) was conducted to determine a recommended range of sample sizes using α = .05 and β = .80 for a mixed factorial ANOVA. Keller and Kennedy 7 previously reported a sex difference in the NIRS-derived rate of desaturation (males: −0.207 ± 0.05, females: −0.123 ± 0.04; effect size f = 0.84), which recommended a total sample size of 12.…”

Section: Power Analysismentioning

confidence: 99%

“…A robust approach to increase resting blood flow includes various forms of passive heating such as whole or lower body, as well as single limb heating. [28][29][30][31][32][33] Importantly, applying passive heat to a limb can facilitate increased blood flow in the absence of skeletal muscle activation, thus minimizing confounding variables. This facilitates the ability to test comparisons between augmented resting blood flow (i.e., heat) and normal resting blood flow (i.e., control) conditions.…”

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confidence: 99%

Sex‐specific microvascular and hemodynamic responses to passive limb heating in young adults

Traylor,

Batman,

Sears

et al. 2024

Microcirculation

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ObjectiveWe examined sex‐specific microvascular reactivity and hemodynamic responses under conditions of augmented resting blood flow induced by passive heating compared to normal blood flow.MethodsThirty‐eight adults (19 females) completed a vascular occlusion test (VOT) on two occasions preceded by rest with or without passive heating in a randomized, counterbalanced order. Skeletal muscle tissue oxygenation (StO2, %) was assessed with near‐infrared spectroscopy (NIRS), and the rate of desaturation and resaturation as well as maximal StO2 (StO2max) and prolonged hypersaturation (area under the curve, StO2AUC) were quantified. Before the VOT, brachial artery blood flow (BABF), vascular conductance, and relative BABF (BABF normalized to forearm lean mass) were determined. Sex × condition ANOVAs were used. A p‐value ≤.05 was considered statistically significant.ResultsTwenty minutes of heating increased BABF compared to the control (102.9 ± 28.3 vs. 36.0 ± 20.9 mL min−1; p < .01). Males demonstrated greater BABF than females (91.9 ± 34.0 vs. 47.0 ± 19.1 mL min−1; p < .01). There was no sex difference in normalized BABF. There were no significant interactions for NIRS‐VOT outcomes, but heat did increase the rate of desaturation (−0.140 ± 0.02 vs. −0.119 ± 0.03% s−1; p < .01), whereas regardless of condition, males exhibited greater rates of resaturation and StO2max than females.ConclusionsThese results suggest that blood flow is not the primary factor causing sex differences in NIRS‐VOT outcomes.

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The acute effects of passive heating on endothelial function, muscle microvascular oxygen delivery, and expression of serum HSP90α

Cited by 5 publications

References 36 publications

Cardiovascular Adjustments After Acute Heat Exposure

Cardiovascular Adjustments After Acute Heat Exposure

The acute effect of heat exposure on forearm macro‐ and microvascular function: Impact of measurement timing, heating modality and biological sex

Sex‐specific microvascular and hemodynamic responses to passive limb heating in young adults

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