The Influence of Nocturnal Food Intake in Eating Behavior of Night Workers
Condition: Shift Work Type Circadian Rhythm Sleep Disorder
MeSH terms: Sleep Wake Disorders; Sleep Disorders, Circadian Rhythm
Study type: Interventional

Summary: 
      This study aimed to verify the influence of night work and food intake during the night shift
      on the eating behavior of fixed night workers the next day.
    

Detailed description: 
      Night work causes restriction of sleep time and circadian misalignment and, therefore, have
      been associated with nutritional and metabolic impairments. The objective of the present
      study is to verify the influence of night work and food intake in this period on the behavior
      of the following day. The workers selected by criteria and inclusion and exclusion will be
      evaluated at the baseline: anthropometric parameters, food consumption and perception,
      duration of food consumption, sleep habits and chronobiological pattern (sleep monitoring by
      actigraphy, chronotype, social jet lag), parameters biochemical (blood count, lipidogram,
      C-reactive protein, cortisol, glucose, insulin).Subsequently, 30 workers will integrate a
      randomized and controlled crossover clinical study with three randomly established
      interventions: (1) two nights of work without meals during the shift; (2) two nights of work
      with a meal during the shift; (3) two nights sleep. Participants will go to the laboratory
      the morning after the second night of each condition to offer a test meal ad libitum, which
      will consist of foods of various compositions and food groups. Preprandial metabolic
      assessments will be conducted (ghrelin, GLP-1 - glucagon-like peptide 1, PYY-peptide YY). The
      following postprandial evaluations will be carried out and in the 24 hours following the
      experiment: food choices (record of all foods) and food perceptions (hunger, appetite,
      satiety and eating). It is expected to determine how nocturnal versus nocturnal work, and
      nocturnal fasting versus nocturnal fasting affect the next day's food choices.
    

Intervention name(s): With Meal during night work; Without Meal during night work; Sleep night
Intervention type(s): Other; Other; Other
Intervention description(s): Two nights of work with a meal during the shift and after will go to the laboratory the morning for eating a test meal ad libitum, which will consist of foods of various compositions and food groups. Preprandial metabolic assessments will be conducted (ghrelin, GLP-1 - glucagon-like peptide 1, PYY-peptide YY). The following postprandial evaluations will be carried out and in the 24 hours following the experiment: food choices (record of all foods) and food perceptions (hunger, appetite, satiety and eating).; Two nights of work without a meal during the shift and after will go to the laboratory the morning for eating a test meal ad libitum, which will consist of foods of various compositions and food groups. Preprandial metabolic assessments will be conducted (ghrelin, GLP-1 - glucagon-like peptide 1, PYY-peptide YY). The following postprandial evaluations will be carried out and in the 24 hours following the experiment: food choices (record of all foods) and food perceptions (hunger, appetite, satiety and eating).; Two sleep nights and after will go to the laboratory the morning for eating a test meal ad libitum, which will consist of foods of various compositions and food groups. Preprandial metabolic assessments will be conducted (ghrelin, GLP-1 - glucagon-like peptide 1, PYY-peptide YY). The following postprandial evaluations will be carried out and in the 24 hours following the experiment: food choices (record of all foods) and food perceptions (hunger, appetite, satiety and eating).
Intervention model: Single Group Assignment
Masking: None (Open Label)
Primary purpose: Prevention