Effects of hydration status on cognitive performance and mood

Masento, Natalie; Golightly, Mark; Field, David T.; Butler, Laurie; Reekum, Carien M. van

doi:10.1017/s0007114513004455

Cited by 182 publications

(122 citation statements)

References 86 publications

(136 reference statements)

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“…According to our data, a good quality of life was not associated with age, marital status, work experience or shift. Contributing factors to a better quality of life were not assessed in this study.The effects of hydration status on cognitive performance and mood have been studied (26) . Our data revealed advantages of having proper liquid ingestion during the shift, such as reduced sleepiness (p= .005) and positive influences on the six mood states: tension (p=.000), depression (p= .000), anger (p= .001), vigor (p= .012), fatigue (p= .000), and confusion (p= .044).…”

mentioning

confidence: 99%

Effects of a 12-hour shift on mood states and sleepiness of Neonatal Intensive Care Unit nurses

Ferreira¹,

Moreira

Guo

et al. 2017

Rev. esc. enferm. USP

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Objective:To assess the effect of a 12-hour shift on mood states and sleepiness at the beginning and end of the shift. Method: Quantitative, cross-sectional and descriptive study. It was conducted with 70 neonatal intensive care unit nurses. The Brunel Mood Scale (BRUMS), Karolinska Sleepiness Scale (KSS), and a socio-demographic profile questionnaire were administered. Results: When the KSS and BRUMS scores were compared at the beginning of the shift associations were found with previous sleep quality (p ≤ 0.01), and quality of life (p ≤ 0.05). Statistical significant effects on BRUMS scores were also associated with previous sleep quality, quality of life, liquid ingestion, healthy diet, marital status, and shift work stress. When the beginning and end of the shift were compared, different KSS scores were seen in the group of all nurses and in the night shift one. Significant vigor and fatigue scores were observed within shift groups. Conclusion: A good night's sleep has positive effects on the individual`s mood states both at the beginning and the end of the shift. The self-perception of a good quality of life also positively influenced KSS and BRUMS scores at the beginning and end of the shift. Proper liquid ingestion led to better KSS and BRUMS scores. DESCRIPTORS INTRODUCTIONIntensive care unit (ICU) nurses have to provide high quality care for fragile patients (1) . Such care occurs in a technology-rich and rapidly changing environment, which gives rise to both human and nonhuman sources of error (2) . Workers with high demands have significantly enhanced risks of developing psychiatric disorders, with stress and fatigue as important contributing factors. Both acute fatigue and chronic fatigue negatively affect quality of life and performance (2) . Stress is a complex phenomenon that includes the psychophysiological stress event and its perception, intrinsic and extrinsic mediating factors, and the response (3) . It has been suggested that perceptions of stress in work situations are more influential than the stressors themselves. Stress can affect the physical health of nurses, manifesting as headaches, skin rashes, intestinal disorders and weight variations. Ultimately, and importantly, it affects the quality of patient care. Care of children with poor prognoses, workload, distrust of nurses' opinions by physicians, lack of knowledge and the limited experience of staff are possible stressors (4) . In addition, lack of support and respect within a team, long hours of work and the responsibility of taking care of critically ill patients, can be added to the list of stressors (5) . ICU nurses must also deal with the patients' family members (3) . Intensive care unit nurses usually work shifts; according to a number of studies 12-h shifts are associated with difficulty in staying awake, sleep deprivation and a threefold risk of making mistakes (6)(7) . A number of studies have quantified the negative impact of sleep deprivation on shift work, fatigue, performance and learning (8) .Comparisons betw...

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mentioning

confidence: 99%

Effects of a 12-hour shift on mood states and sleepiness of Neonatal Intensive Care Unit nurses

Ferreira¹,

Moreira

Guo

et al. 2017

Rev. esc. enferm. USP

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“…Some mechanisms, such as limited attention during a thirst situation and changes at total brain volume shrinkage and over-recruitment of specific brain areas [26,27] may partially explain the impaired cognitive function. A difficult issue is to compare results from other studies, because the protocols used to achieve RWL are widely variable, such as exercise, extreme environment, sweat suits and sever [28,29,30]. The strategies of RWL widely used in the combat sports field, especially in MMA, result in dehydration and negative effects may occur.…”

Section: Discussionmentioning

confidence: 99%

Salivary nitrite content, cognition and power in Mixed Martial Arts fighters after rapid weight loss: a case study

et al. 2016

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Background and Aim: Rapid weight loss (RWL) is extensively practiced by combat sports athletes, including Mixed Martial Arts (MMA), but its effects on performance are not well established with different magnitudes of RWL, including those higher than 5% of total body weight. The aim of the present study was to follow MMA athletes during RWL with subsequent weight regain to evaluate the responses of isometric strength, power, cognition and salivary nitrite (NO2 -) content. Methods:Two professional male MMA fighters, same age, competing in the same weight category underwent two magnitudes of RWL before a simulated competition period. Anthropometric measures, records of nutritional status, training, voluntary dehydration strategies, salivary samples, cognition response, isometric strength and muscular power were obtained: (I) 7 days before combat, (II) at the weigh-in moment, and (III) in the combat day. Results and Conclusions: Athlete 1 lost 7.2 kg (9.1% of total bodyweight) and Athlete 2 lost 4.0 kg (5.3% of total bodyweight). Athlete 1 had a lower and misbalanced caloric ingestion (708 ± 428 kcal), ingested 6 L of water during the first 5 days of RWL, underwent 2 days of fasting, water and sodium restriction before weigh-in. Athlete 2 was supervised by a nutritionist, had a balanced diet (1600 ± 0 kcal), ingested 2 L of water during the first 6 days of RWL, underwent only 1 day of fasting and water restriction, and did not restrict sodium. As expected, there was a negative effect of RWL in the evaluated parameters at the weigh-in moment, while in the combat day, salivary NO2 -was not completely reestablished at baseline levels (decreased by 35.9% in Athlete 1 and, 25.2% in Athlete 2, as compared with 7 days before). The athlete who underwent a lower weight loss (5.3%) presented better recovery of cognition and upper limbs power on the combat day as compared with the athlete who lost 9.1% of body weight. Although we cannot precisely conclude, this case report led us to believe that the recovery period between weigh-in and competition may be insufficient for total reestablishment of salivary NO2 -after RWL, and higher amounts of RWL have negative impacts on average power and cognition when compared with lower RWL. Relevance for patients: Scientific aspects related with performance in MMA athletes brought to light the absence of studies investigating the recovery of isometric strength, power, cognition and salivary NO2 -during RWL with subsequent weight regain. This study revealed that athletes from the same categories can adopt different magnitudes of weight loss, and that this procedure impacts several important measures, for example, the reduction of salivary NO2 -is associated with the lower O2 transport capacity, decreasing muscle performance.

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“…However, we commonly associate this as only a problem in physically demanding situations and harsh environments. It is well evidenced that there is a difference in physiological stress between euhydrated and dehydrated individuals, with several reviews indicating minimal dehydration (as low as 1%-2% body mass loss) potentially affecting mood, attention, reaction time, vigilance, working memory, and increased tension/anxiety (American Dietetic Association 2009; Ganio et al 2011;Masento et al 2014;Maughan 2003;Maughan et al 2007). Moderate dehydration (ϳ2% body mass loss) has commonly been associated with detrimental physiological effects and reductions in endurance exercise performance, particularly in hot conditions (Burge et al 1993;Ebert et al 2007;Lopez et al 2011;Maughan et al 1996;McConell et al 1997;Sawka et al 2007).…”

Section: Hydration In the Workplace: Influence On Performance And Welmentioning

confidence: 99%

Nutra-ergonomics: influence of nutrition on physical employment standards and the health of workers

Shearer

Graham

Skinner

2016

Appl. Physiol. Nutr. Metab.

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Abstract:The importance of ergonomics across several scientific domains, including biomechanics, psychology, sociology, and physiology, have been extensively explored. However, the role of other factors that may influence the health and productivity of workers, such as nutrition, is generally overlooked. Nutra-ergonomics describes the interface between workers, their work environment, and performance in relation to their nutritional status. It considers nutrition to be an integral part of a safe and productive workplace that encompasses physical and mental health as well as the long-term wellbeing of workers. This review explores the knowledge, awareness, and common practices of nutrition, hydration, stimulants, and fortified product use employed prior to physical employment standards testing and within the workplace. The influence of these nutra-ergonomic strategies on physical employment standards, worker safety, and performance will be examined. Further, the roles, responsibilities, and implications for the applicant, worker, and the employer will be discussed within the context of nutra-ergonomics, with reference to the provision and sustainability of an environment conducive to optimize worker health and wellbeing. Beyond physical employment standards, workplace productivity, and performance, the influence of extended or chronic desynchronization (irregular or shift work) in the work schedule on metabolism and long-term health, including risk of developing chronic and complex diseases, is discussed. Finally, practical nutra-ergonomic strategies and recommendations for the applicant, worker, and employer alike will be provided to enhance the short-and long-term safety, performance, health, and wellbeing of workers.

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Effects of hydration status on cognitive performance and mood

Cited by 182 publications

References 86 publications

Effects of a 12-hour shift on mood states and sleepiness of Neonatal Intensive Care Unit nurses

Effects of a 12-hour shift on mood states and sleepiness of Neonatal Intensive Care Unit nurses

Salivary nitrite content, cognition and power in Mixed Martial Arts fighters after rapid weight loss: a case study

Nutra-ergonomics: influence of nutrition on physical employment standards and the health of workers

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