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schedule (e.g., frequency of night shifts, duration in years) are needed. Further, research to the (mediating) role of lifestyle behaviours in the health effects of shift work is recommended, as this may offer potential for preventive strategies. Introduction Early functional ageing -EFA is the progressive work ability -WA impairment preceding the chronological ageing. Hospital work is characterised by physical and mental workloads arising from work stressors that can influence functional ageing. The aim of this follow-up study was to assess the association between psychosocial work stressors and functional ageing in a group of Brazilian hospital employees. Methods This is a 3 year follow-up (2009-2012) study of 423 hospital workers of São Paulo, Brazil. We included only workers with excellent/good WA at the baseline. At baseline workers filled a form on sociodemographic, lifestyle, and occupational questions including the Brazilian versions of Job Stress Scale, Effort-Reward Questionnaire, Work-Related Activities That May Contribute To Job-Related Pain and/or Injury, and Work Ability Index. Moderate/poor WA were considered as EFA. Changes from excellent/good to moderate/poor WA were the dependent variable. We used logistic regression models adjusted for potential confounders. Results The average age was 36.0 y (SD=8.3), 30.7% were over 40 y, 72.1% were females. At the end of follow-up the exposure to work stressors had worsened: job strain (20.3%), social support (22.7%), effort-reward imbalance (18.7%), overcommitment (18.4%) and Work-Related Activities That May Contribute To Job-Related Pain and/or Injury (13.9%). Eighteen percent of the workers shifted to moderate or poor WA. High levels of exposure to psychosocial work stressors were significantly associated with decreased work ability: job strain (OR=2.81) and effort-reward imbalance (OR=3.21). Discussion Work stressors were risk factors for work ability. The results showed the need for interventions to maintain hospital employees' work ability. Such strategies have implications for institutional and social policies to prevent early functional ageing.

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The negative effects of sleep loss on sleepiness, performance, and mood have been well-documented. Less is known, however, about possible negative effects of sleep extension and findings are inconsistent. This study investigated the Rip Van Winkle effect, comparing the effects of a single night of sleep extension (11 h time-in-bed, TIB) to control sleep (8.5 h TIB) following three nights on a nominal (8.5 h TIB) or restricted (6.5 h TIB) sleep schedule. Nine healthy males (mean age 21 y; mean habitual sleep 7.9 h) participated in a four-way cross-over design. Participants completed sleepiness and mood scales, a range of performance tasks, and multiple sleep latency tests approximately every two hours following in-laboratory baseline and experimental nights. Objective sleepiness was reduced (i.e., sleep onset latency was delayed) following sleep extension under both nominal and restricted baseline conditions. Self-reported mood was modestly improved following sleep extension. No changes in subjective sleepiness or objectively measured performance were observed across conditions. The results indicate that one night of sleep extension, following either nominal or restricted sleep, can reduce objective sleepiness but does not appear to consistently alter performance or subjective sleepiness.