Impact of Pre-exercise Hypohydration on Aerobic Exercise Performance, Peak Oxygen Consumption and Oxygen Consumption at Lactate Threshold: A Systematic Review with Meta-analysis

Deshayes, Thomas A.; Jeker, David; Goulet, Eric

doi:10.1007/s40279-019-01223-5

Cited by 32 publications

(26 citation statements)

References 66 publications

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“…21 In terms of power, the findings from the present study are in support of previous literature that have not seen differences in vertical jump performance between euhydrated and hypohydrated individuals. 22 While previous literature has demonstrated impaired aerobic performance from a pre-exercise hypohydrated state, 23 the findings from this study add to the literature by demonstrating that repeat sprint performance was also negatively impacted later in an exercise bout in hypohydrated trials, evident by the differences in the number of treadmill belt rotations between trials. This outcome contributes to previously studied literature that has mixed results related to repeated sprint performance during exercise in the heat.…”

Section: Discussionsupporting

confidence: 50%

The effects of hydration status and ice-water dousing on physiological and performance indices during a simulated soccer match in the heat

Benjamin

Sekiguchi

Morrissey

et al. 2021

Journal of Science and Medicine in Sport

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Objectives: To assess the effects of hydration status and ice-water dousing on physiological and performance parameters. Design: Randomized, crossover. Methods: Twelve athletes (mean[M] ± standard deviation [SD]; age, 20 ± 1 years; height, 174 ± 8 cm; body mass, 72.1 ± 11.0 kg; VO 2max 53.9 ± 7.3 mL⋅kg −1 ⋅min −1 ) completed four trials (euhydrated without dousing, hypohydrated without dousing, euhydrated with dousing, and hypohydrated with dousing), which involved intermittent treadmill running (five 15-minute bouts) in the heat (M ± SD; ambient temperature, 34.7 ± 2.1°C; relative humidity, 46 ± 3%; wet-bulb globe temperature, 28.0 ± 0.4°C). Participants also completed four cognitive, power, agility, reaction time, and repeated sprint performance tests throughout each trial. Heart rate (HR) and rectal temperature (T rec ) were measured continuously. Repeated measures ANOVAs were performed to assess differences between physiological and performance variables. Alpha was set at ≤0.05, a priori. Data are reported as mean difference ± standard error (MD ± SE). Results: HR was significantly lower in euhydrated trials compared to hypohydrated trials, irrespective of dousing (8 ± 2 bpm; p = 0.001). Dousing did not significantly impact HR (p = 0.455) and there was no interaction between hydration and dousing (p = 0.893). T rec was significantly lower in euhydrated trials compared to hypohydrated trials (0.39 ± 0.05°C, p < 0.001), with no effect from dousing alone (p = 0.113) or the interaction of hydration and dousing (p = 0.848). Dousing resulted in improved sprint performance (11 ± 3 belt rotations, p = 0.007), while hydration status did not (p = 0.235). Conclusions: Athletes should aim to maintain euhydration during exercise in the heat for improved physiological function and cooling with ice-water dousing elicits additional performance benefits.

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Section: Discussionsupporting

confidence: 50%

The effects of hydration status and ice-water dousing on physiological and performance indices during a simulated soccer match in the heat

Benjamin

Sekiguchi

Morrissey

et al. 2021

Journal of Science and Medicine in Sport

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“…dry vs. humid) led to a similar decrease in V̇O2max, which was more pronounced when hypohydrated by 3% body mass. Altogether, these data indicate that V̇O2max declines markedly upon exceeding the ~3% body mass loss threshold (246,985) and may only slightly exacerbate the effects of hyperthermia. This suggests that an elevated whole-body temperature (e.g.…”

Section: Heat Stress Hydration Status and Maximal Aerobic Powermentioning

confidence: 76%

“…The magnitude of the decrease is reliant on marked elevations in both core and skin temperature, which in turn drive an increase in physiological strain that suppresses systemic and exercising muscle oxygen delivery (677,982). When combined with hypohydration, the decrease in V̇O2max under heat stress might be expected to worsen, particularly given a recent meta-analysis reporting that a ~4% reduction in body mass leads to a ~2.5% reduction in V̇O2max in temperate conditions (~20.5ºC) (246). Under heat stress however, when hyperthermia is combined with hypohydration, most of the reduction in V̇O2max appears attributable to the magnitude of thermal strain.…”

Section: Heat Stress Hydration Status and Maximal Aerobic Powermentioning

confidence: 99%

Exercise under heat stress: thermoregulation, hydration, performance implications, and mitigation strategies

Périard

Eijsvogels²,

Daanen

2021

Physiological Reviews

218

166

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A rise in body core temperature and loss of body water via sweating are natural consequences of prolonged exercise in the heat. This review provides a comprehensive and integrative overview of how the human body responds to exercise under heat stress and the countermeasures that can be adopted to enhance aerobic performance under such environmental conditions. The fundamental concepts and physiological processes associated with thermoregulation and fluid balance are initially described, followed by a summary of methods to determine thermal strain and hydration status. An outline is provided on how exercise-heat stress disrupts these homeostatic processes, leading to hyperthermia, hypohydration, sodium disturbances and in some cases exertional heat illness. The impact of heat stress on human performance is also examined, including the underlying physiological mechanisms that mediate the impairment of exercise performance. Similarly, the influence of hydration status on performance in the heat and how systemic and peripheral hemodynamic adjustments contribute to fatigue development is elucidated. This review also discusses strategies to mitigate the effects of hyperthermia and hypohydration on exercise performance in the heat, by examining the benefits of heat acclimation, cooling strategies and hyperhydration. Finally, contemporary controversies are summarized and future research directions provided.

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“…Mild hyponatremia occurs at plasma [Na + ] of 130-135 mmol/L, whereas [Na + ] < 125 mmol/L is symptomatic and incompatible with physical exercise. On the other hand, also a pre-exercise hypohydration reduces sport performance: A hypohydration above 3% of body mass negatively affects short-duration (5-30 min), high-intensity exercise, while maximal oxygen consumption decreases by 2.4-2.9% for each percent unit of body weight loss [42,43].…”

Section: Hydration Status and Sport Performancementioning

confidence: 99%

Different Waters for Different Performances: Can We Imagine Sport-Related Natural Mineral Spring Waters?

Presta

Ambrosini

Carubbi

et al. 2021

Water

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Preserving the hydration status means to balance daily fluids and salt losses with gains, where the losses depend on several physiological and environmental factors. Especially for athletes, these losses could be relevant and negatively influence the performance: therefore, their hydro-saline status must be preserved with personalized pre- and rehydration plans all along the performance period. Scientific literature in this field is mainly dedicated to artificial sport drinks. Different territories in most world areas are rich in drinking natural mineral spring waters with saline compositions that reflect their geological origin and that are used for human health (often under medical prescription). However, scarce scientific attention has been dedicated to the use of these waters for athletes. We therefore reviewed the existing literature from the innovative viewpoint of matching spring water mineral compositions with different athletic performances and their hydro-saline requirements.

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Impact of Pre-exercise Hypohydration on Aerobic Exercise Performance, Peak Oxygen Consumption and Oxygen Consumption at Lactate Threshold: A Systematic Review with Meta-analysis

Cited by 32 publications

References 66 publications

The effects of hydration status and ice-water dousing on physiological and performance indices during a simulated soccer match in the heat

The effects of hydration status and ice-water dousing on physiological and performance indices during a simulated soccer match in the heat

Exercise under heat stress: thermoregulation, hydration, performance implications, and mitigation strategies

Different Waters for Different Performances: Can We Imagine Sport-Related Natural Mineral Spring Waters?

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