Jet lag: trends and coping strategies

Waterhouse, Jim; Reilly, Thomas; Atkinson, Greg; Edwards, Ben

doi:10.1016/s0140-6736(07)60529-7

Cited by 359 publications

(321 citation statements)

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“…In addition, these near-24-h rhythms can be synchronized to and aligned with the 24-h environment via light. Rapid long-distance east-west travel can desynchronize internal clocks from the external 24-h environment, resulting in symptoms collectively known as "jet lag" (2,3). These include poor sleep, fatigue, gastrointestinal disturbance, and impaired motor performance.…”

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How jet lag impairs Major League Baseball performance

Song

Severini

Allada

2017

Proc. Natl. Acad. Sci. U.S.A.

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Laboratory studies have demonstrated that circadian clocks align physiology and behavior to 24-h environmental cycles. Examination of athletic performance has been used to discern the functions of these clocks in humans outside of controlled settings. Here, we examined the effects of jet lag, that is, travel that shifts the alignment of 24-h environmental cycles relative to the endogenous circadian clock, on specific performance metrics in Major League Baseball. Accounting for potential differences in home and away performance, travel direction, and team confounding variables, we observed that jet-lag effects were largely evident after eastward travel with very limited effects after westward travel, consistent with the >24-h period length of the human circadian clock. Surprisingly, we found that jet lag impaired major parameters of home-team offensive performance, for example, slugging percentage, but did not similarly affect away-team offensive performance. On the other hand, jet lag impacted both home and away defensive performance. Remarkably, the vast majority of these effects for both home and away teams could be explained by a single measure, home runs allowed. Rather than uniform effects, these results reveal surprisingly specific effects of circadian misalignment on athletic performance under natural conditions. jet lag | circadian rhythms | athletic performance | Major League Baseball

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mentioning

confidence: 99%

How jet lag impairs Major League Baseball performance

Song

Severini

Allada

2017

Proc. Natl. Acad. Sci. U.S.A.

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“…Entretanto, vôos transmeridianos geralmente criam uma condição conhecida como jet lag. Esta condição é caracterizada pela dificuldade de adaptação aos novos horários impostos pela mudança de fuso horário (Waterhouse et al, 2007). Isso ocorre porque nossos ritmos estão sincronizados ao local de origem, demorando alguns dias para sincronizarem-se aos ciclos ambientais e sociais do local de destino.…”

Section: Voos Transmeridianosunclassified

“…A intensidade dos sintomas do jet lag varia de acordo com o número de fusos horários percorridos, bem como com a direção tomada, sendo que vôos em sentido leste parecem estar relacionados a sintomas mais severos (Waterhouse et al, 2007). Segundo alguns autores, o jet lag causa uma miríade de problemas físicos, emocionais e psiquiátricos (Mahoney, 2010), que variam desde dores de cabeça, problemas gastrointestinais, diminuição do apetite, dificuldades de manutenção de atenção e concentração e baixo rendimento em tarefas físicas e mentais (Waterhouse et al, 2007).…”

Section: Voos Transmeridianosunclassified

“…Segundo alguns autores, o jet lag causa uma miríade de problemas físicos, emocionais e psiquiátricos (Mahoney, 2010), que variam desde dores de cabeça, problemas gastrointestinais, diminuição do apetite, dificuldades de manutenção de atenção e concentração e baixo rendimento em tarefas físicas e mentais (Waterhouse et al, 2007).…”

Section: Voos Transmeridianosunclassified

“…A ingestão do hormônio melatonina, secretado naturalmente pela glândula pineal durante a fase de escuro do ciclo claro/escuro, parece garantir melhora dos sintomas (Waterhouse et al, 2007). Apesar disso, a comercialização desse hormônio é proibida no Brasil, sendo ainda pouco conhecidas todas as consequências do seu uso para o organismo.…”

Section: Voos Transmeridianosunclassified

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Interação entre sincronizadores fóticos e sociais: repercussões para a saúde humana

Pereira¹,

Anacleto²,

Louzada³

2012

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Recebido 15out10Aceito 26jul12 Publicado 27dez12Resumo. O ciclo claro/escuro é considerado o mais importante zeitgeber dos ritmos de mamíferos. No entanto, em humanos, o advento da luz elétrica alterou os padrões de sincronização. A exposição à luz artificial durante a fase escura, especialmente em função de situações de trabalho e estudo noturno, viagens transmeridianas e hábitos como TV e internet, está associada à dessincronização dos ritmos circadianos. Uma variedade de pesquisas básicas e aplicadas vem demonstrando as consequências dessa falta de sincronização. Assim, o objetivo deste estudo foi discutir, em estudos com populações brasileiras, as principais consequências das interações entre sincronizadores sociais e o ciclo claro/escuro, com especial atenção às questões de saúde humana. Palavras-chave. Ciclo claro/escuro; Exposição à luz artificial; Trabalho em turnos; Viagens transmeridianas; Atraso de fase; Saúde humana.Abstract. The light/dark cycle is considered the most important zeitgeber of mammals' rhythms. For humans, however, the advent of electric lighting changed synchronization patterns. The exposure to artificial light during the dark phase, especially due to work and evening school, and TV/internet habits, has been associated with desynchronization of circadian rhythms. A variety of basic and applied research has demonstrated the consequences of being out-of-sync for health. The objective of this paper is to discuss the main consequences of the interaction between social synchronizers and the natural light/dark cycle, especially considering studies on the consequences for the human health in Brazilian populations. Keywords Exposição ao ciclo claro/escuro e ritmicidade biológicaDesde os tempos mais remotos, os organismos convivem com processos cíclicos do ambiente. Em função da organização do sistema solar, a Terra é submetida a interações que envolvem forças de atração entre os diferentes planetas e corpos celestes. As interações da Terra com o Sol e a Lua, aliadas à inclinação de seu eixo, resultam nos ciclos ambientais, tais como o ciclo claro/escuro .A relação entre os ritmos biológicos e os ciclos ambientais é conhecida há muito. No entanto, a ideia inicial de que esses ritmos seriam passivos, ou seja, determinados pelos ciclos ambientais, começou a ser desconstruída apenas a partir da publicação do experimento realizado em 1729 pelo astrônomo Jean-Jacques d' Ortous de Mairan.No trabalho, foi demonstrado que plantas sensitivas (provavelmente Mimosa pudica), mesmo isoladas em escuro constante eram capazes de manter o ritmo de abertura e fechamento das folhas.Esse experimento, bem como estudos subsequentes, demonstrou que, organismos mantidos em condições constantes e, portanto, isolados das pistas do ambiente, continuam expressando ritmos circadianos, com períodos maiores ou menores do que 24 horas.Nos mamíferos, a sincronização dos ritmos biológi-cos é possível em função da presença de dois conjuntos de neurônios hipotalâmicos, localizados sobre o quiasma óptico, denominados núcleos sup...

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Comparison of Sleep and Attention Metrics Among Nurses Working Shifts on a Forward- vs Backward-Rotating Schedule

et al. 2021

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IMPORTANCEThe association of fast backward-rotating shift work (ie, anticlockwise sequence of afternoon, morning, and night shifts) with subjective and objective measures of sleep-wake quality, daytime attention, and tiredness of health care workers has not yet been established. OBJECTIVE To investigate the association of shift rotation direction with tiredness, sleepiness, and sustained attention among nurses working forward-and backward-rotating shifts. DESIGN, SETTING, AND PARTICIPANTS Data of this cohort study were collected from nurses working at 5 midsized Italian hospitals. The nurses had either a forward-rotating schedule (ie, morning to afternoon to night) and or a backward-rotating schedule (ie, afternoon to morning to night). The data were collected from July 2017 to February 2020. Data analysis was performed from May to October 2020. EXPOSURES Participants were working either forward-or backward-rotating schedules, in which the sequence of 3 shifts (morning, afternoon, and night) changed in a clockwise or anticlockwise direction. MAIN OUTCOMES AND MEASURES Sleep data were collected using the Karolinska Sleepiness Scale and Pittsburgh Sleep Quality Index. Sustained attention was measured using the Psychomotor Vigilance Task. Tiredness was evaluated using the Tiredness Symptom Scale. RESULTS A total of 144 nurses (mean [SE] age, 41.3 [0.8] years; 92 women [63.9%]) participated in the study; 80 nurses had forward-rotating schedules, and 64 had backward-rotating schedules.Nurses with irregular sleep-wake patterns due to night shift work had poor sleep quality (46 [57.5%] in forward-rotating schedule group; 37 [57.8%] in backward-rotating schedule group). Nurses working backward-rotating shifts exhibited significantly greater sleepiness (F 1,139 = 41.23; P < .001) and cognitive slowing (ie, longer median reaction times; F 1,139 = 42.12; P < .001) than those working forward rotations. Importantly, these differences were not affected by age, years of employment, and quality of sleep. Of nurses working on a backward-rotating schedule, 60 (93.8%) reported elevated sleepiness (Karolinska Sleepiness Scale score Ն7) after the night shift. The median reaction time (F 1,139 = 42.12; P < .001), 10% fastest reaction time (F 1,139 = 97.07; P < .001), minor lapses (F 1,139 = 46.29; P < .001), and reaction time distribution (F 1,139 = 60.13; P < .001) of nurses on backward-rotating schedules indicated a lower level of vigilance, which is negatively associated with neurobehavioral performance. CONCLUSIONS AND RELEVANCEIn this study, both shift rotation models were negatively associated with health and cognitive performance. These findings suggest that forward shift rotation may be more beneficial than backward rotation for several measured performance attentional (continued) Key Points Question Among hospital staff who work day and night shifts, do sleep and attention metrics vary between those who work forward-vs backwardrotating shifts? Findings This cohort study of 144 nurses found that fast forward-rotating shifts...

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Jet lag: trends and coping strategies

Cited by 359 publications

References 125 publications

How jet lag impairs Major League Baseball performance

How jet lag impairs Major League Baseball performance

Interação entre sincronizadores fóticos e sociais: repercussões para a saúde humana

Comparison of Sleep and Attention Metrics Among Nurses Working Shifts on a Forward- vs Backward-Rotating Schedule

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