Cardiovascular responses to water ingestion at rest and during isometric handgrip exercise

Mendonça, Gonçalo V.; Teixeira, Micael S.; Pereira, Fernando D.

doi:10.1007/s00421-011-2223-6

Cited by 6 publications

(8 citation statements)

References 29 publications

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“…This is supported by the lack of a significant condition‐by‐time interaction for heart rate and HF spectral power. A significant water‐induced bradycardia has also been demonstrated during static handgrip and in response to dynamic exercise performed below the ventilatory threshold (Mendonca et al ., , ). Past research further indicates that drinking 500 ml of water immediately after performing moderate intensity cycling heightens cardiovagal activity at 30 min of recovery (Vianna et al ., ).…”

Section: Discussionmentioning

confidence: 99%

“…However, our results indicate that the water-induced bradycardia was not effective in preventing the rise of BP at pre-and postexercise time points, and this is in partial agreement with previous findings. In this context, while some studies have shown that a compensatory bradycardia minimizes the osmopressor response, others have not observed such cause-effect relationship (Routledge et al, 2002;Schroeder et al, 2002;Brown et al, 2005;Callegaro et al, 2007;Mendonca et al, 2012Mendonca et al, , 2013. Interestingly, it has been suggested that the physiological responses to water drinking follow a sexually dimorphic pattern, with women demonstrating larger pressor responses than men (Boschmann et al, 2003;Mendonca et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

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The influence of water ingestion on postexercise hypotension and standing haemodynamics

Mendonça

Fernhall

2015

Clin Physio Funct Imaging

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In young healthy adults, postexercise hypotension (PEH) occurs after a single bout of dynamic exercise due to peripheral vasodilation. Gravitational stress may further aggravate the magnitude of PEH, thus predisposing to orthostatic intolerance. As water drinking activates sympathetic vasoconstriction, it might offset PEH via enhanced α-adrenergic vascular responsiveness. We hypothesized that water ingestion before exercise would decrease the magnitude of PEH and improve the haemodynamic reaction to active standing postmaximal exercise. In a randomized fashion, 17 healthy adults (nine men; eight women, 21·2 ± 1·6 years) ingested 50 and 500 ml of water before completing resting, cycle ergometer and recovery protocols on two separate days. After exercise, measurements [arterial blood pressure (BP), heart rate and spectral heart rate variability (HRV)] were taken in the seated position followed by 5 min of active standing. Compared to that seen post-50 ml of water, the 500 ml volume elicited an overall increase in BP (P < 0·05). Nevertheless, the magnitude of PEH was not different after either volume of water. There was an overall bradycardic effect of water, and this was accompanied by increased high-frequency power (P < 0·05). Finally, no BP, heart rate or HRV differences were found between conditions in response to active standing. These data suggest that, despite being well preserved after maximal exercise, the water pressor response does not affect the magnitude of PEH. They also indicate that drinking 500 ml of water does not impact the BP, heart rate or HRV response to 5 min of active standing during recovery postmaximal exercise.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

The influence of water ingestion on postexercise hypotension and standing haemodynamics

Mendonça

Fernhall

2015

Clin Physio Funct Imaging

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“…A descriptive analysis of the sample is shown in Table 1. (21)(22)(23)(24)(25)(26)(27)(28) Legend: Mean ± standard deviation (range) Source: Authors The initial transient HR increased significantly when the CVI results were compared before and 5 minutes after water intake (p = 0.002) ( Figure 2), but no differences were seen between the two volumes (p = 0.801). Regarding the average duration of RR interval, there was a significant increase in the duration of these intervals in the 20 th minute at rest (Figure 3).…”

Section: Resultsmentioning

confidence: 99%

“…Interestingly, studies that analyzed the effects of water intake on autonomic modulation used volumes equal to or near 500 mL 9,20 compared to a volume of 50 mL as the control [21][22][23] . However, it is likely that the sudden intake of 500 mL of water can generate stomach discomfort and relevant symptoms, such as nausea, which could influence the results.…”

Section: Introductionmentioning

confidence: 99%

Effects of Ingesting 250 and 500 Ml of Water on Initial Transient Heart Rate and Heart Rate Variability

Rocha¹,

Ramos²,

Araújo³

et al. 2018

J Phys Educ

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RESUMOO objetivo foi analisar o efeito da ingestão de duas quantidades de água na modulação autonômica. Participaram 26 homens, com idade entre 18 e 30 anos, foram submetidos a dois dias de intervenção e avaliação com intervalo de 24 horas. O protocolo consistiu na ingestão de 250 ou 500 mL de água, em ordem randômica. Para avaliar o TIFC no exercício dinâmico foi utilizado o índice vagal cardíaco (IVC) obtido por meio do Teste de Exercício de 4 segundos nos momentos pré e pósingestão (5º, 10º, 20º e 30º minutos). Para avaliar a modulação autonômica no repouso foi utilizada a VFC durante 30 minutos após a ingestão, quando foi registrado a FC de repouso. Os resultados apontam que após 5 minutos da ingestão de água houve um aumento do TIFC (p=0,02), sem que houvesse diferença em função dos volumes de água ingeridos (p=0,8). Na VFC não houve diferença entre os volumes ingeridos, tanto no domínio do tempo quanto no domínio da frequência. Em relação a FC de repouso, houve diferença no 20º minuto quando comparado aos demais momentos (p<0,05). Conclui-se que os nossos resultados demostraram que não houve diferença no TIFC, VFC e na FC de repouso quando foram comparadas a ingestão de 250 e 500 mL de água à temperatura ambiente em indivíduos saudáveis. Contudo, o TIFC e a FC de repouso demostraram diferença entre os momentos analisados. Palavras-chave: Hidratação. Frequência cardíaca. Sistema nervoso autonômico. ABSTRACTThe purpose was to analyze the effect of the ingestion of two amounts of water in the autonomic modulation. A total of 26 men aged 18-30 years under went 2 days of intervention and evaluation with 24 hours in between. The protocol consisted of the intake of 250 or 500 mL of water in a random order. To assess the initial transient HR during dynamic exercise, the cardiac vagal index was obtained using a 4-second exercise test during the pre-and post-ingestion periods (5, 10, 20, and 30 minutes). To evaluate autonomic modulation at home, HRV value 30 minutes after water intake was used when HR at rest was registered. The results shows: Five minutes after the water intake, the initial transient HR was increased (p = 0.02) with no difference in effect of the ingested volumes of water (p = 0.8). In HRV, there was no difference between the intake volumes in the time or frequency domains. There were differences in HR rest after 20 minutes compared to at other times (p < 0.05). In conclusion the results showed no difference in initial transient HR, HRV, or HR rest after the intake of 250 versus 500 mL of room temperature water in healthy individuals. However, resting initial transient HR and HR rest values differed among the analyzed times.

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“…The bradycardic response after water ingestion is also sustained during isometric handgrip exercise, a physiological condition characterized by considerable vagal withdrawal and sympathetic activation (Mendonca et al 2012). Despite this, the acute effects of water ingestion on the chronotropic response to dynamic exercise have not been extensively studied.…”

Section: Introductionmentioning

confidence: 99%

Chronotropic and pressor effects of water ingestion at rest and in response to incremental dynamic exercise

Mendonça

Teixeira

Heffernan

et al. 2013

Experimental Physiology

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New Findings r What is the central question of this study?The effects of water ingestion on the chronotropic response to dynamic exercise, performed below and above the ventilatory threshold, have not been previously explored. r What is the main finding and its importance? Drinking 500 ml of water before exercise reduces the chronotropic response to submaximal exercise performed below and above the ventilatory threshold, but not at maximal exercise intensities.Ingestion of water attenuates the chronotropic response to submaximal exercise. However, it is not known whether this effect is equally manifested during dynamic exercise below and above the ventilatory threshold (VT). We explored the effects of water ingestion on the heart rate response to an incremental cycle-ergometer protocol. In a randomized fashion, 19 healthy adults (10 men and nine women, age 20.9 ± 1.8 years) ingested 50 and 500 ml of water before completing a cycle-ergometer protocol on two separate days. The heart rate and oxygen uptake (V O 2 ) responses to water ingestion were analysed both at rest and during exercise performed below and above the VT. The effects of water intake on brachial blood pressure were measured only at rest. Resting mean arterial pressure increased and resting heart rate decreased, but only after 500 ml of water (P < 0.05). Compared with that seen after 50 ml of water, the 500 ml volume elicited an overall decrease in submaximal heart rate (P < 0.05). In contrast, drinking 500 ml of water did not affect submaximalV O 2 . The participants' maximal heart rate, maximalV O 2 and VT were similar between conditions. Our results therefore indicate that, owing to its effects on submaximal heart rate over a broad spectrum of intensities, the drinking of water should be recognized as a potential confounder in cardiovascular exercise studies. However, by showing no differences between conditions for submaximalV O 2 , they also suggest that the magnitude of heart rate reduction after drinking 500 ml of water may be of minimal physiological significance for exercise cardiorespiratory capacity.

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Cardiovascular responses to water ingestion at rest and during isometric handgrip exercise

Cited by 6 publications

References 29 publications

The influence of water ingestion on postexercise hypotension and standing haemodynamics

The influence of water ingestion on postexercise hypotension and standing haemodynamics

Effects of Ingesting 250 and 500 Ml of Water on Initial Transient Heart Rate and Heart Rate Variability

Chronotropic and pressor effects of water ingestion at rest and in response to incremental dynamic exercise

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