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Meal composition and shift work performance.

Heather L Love1, Corilee A Watters, Wei-Ching Chang

  • 1Whitehorse, Yukon, Canada.

Canadian Journal of Dietetic Practice and Research : a Publication of Dietitians of Canada = Revue Canadienne De La Pratique Et De La Recherche En Dietetique : Une Publication Des Dietetistes Du Canada
|March 23, 2005
PubMed
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Shift workers

Area of Science:

  • Nutrition Science
  • Occupational Health
  • Cognitive Performance

Background:

  • Dietary intake significantly impacts task performance.
  • Shift work presents unique challenges to alertness and cognitive function.
  • Understanding meal composition effects on shift workers is crucial for occupational health.

Purpose of the Study:

  • To investigate the impact of a specific meal composition on alertness and cognitive performance in shift workers.
  • To compare cognitive test scores and sleepiness levels after consuming a medium-fat, medium-carbohydrate meal versus a low-fat, high-carbohydrate diet during night shifts.

Main Methods:

  • Six shift workers participated, recording sleep and food intake over two weeks.
  • Cognitive performance was assessed using the Paced Auditory Serial Addition Test (PASAT).

Related Experiment Videos

  • Sleepiness was measured using the Stanford Sleepiness Scale (SSS), alongside body temperature monitoring.

    • Main Results:

    • A medium-fat, medium-carbohydrate meal significantly improved the 1.6-second PASAT score compared to a high-carbohydrate baseline diet (p=0.042).
    • No significant differences in Stanford Sleepiness Scale scores or body temperature patterns were observed between baseline and test periods.
    • Meal composition and size during night shifts may influence cognitive abilities.

    Conclusions:

    • The composition of meals consumed during night shifts can modulate cognitive performance in shift workers.
    • Further research is warranted to optimize dietary strategies for enhancing alertness and performance in shift work environments.
    • Findings suggest that a shift in macronutrient balance towards moderate fat and carbohydrate intake may benefit cognitive function during night shifts.