RESUMO
ABSTRACTNehme PXSA. Effects of a nutritional intervention on sleepiness of night workers.[dissertação de mestrado]. São Paulo: Faculdade de Saúde Pública da USP; 2011.
Introduction:There is some evidence linking the increased sleepiness with increased consumption of carbohydrates, which is particularly important for night workers. Objective:To evaluate the effects of changes in content of protein and carbohydrate food at night in the sleepiness of night workers. Methods: The population was male security guards, mean age 32 years (SD = 6.5 years). The study was conducted in two stages. The first stage had 54 security guards who underwent anthropometric measurements and answered a questionnaire about aspects of life style, work and health symptoms and 24-hour recall (24HR) for three days. The second stage lasted for 3 weeks which involved randomly assigned, 24 security guards. In this step it was evaluated the sleep-wake cycle through actigraphy, daily activity protocols and Karolinska Sleepiness Scale (KSS). Changing the contents of feeding occurred in 2 weeks. At first it was the carbohydrate content increased by 5 days, after two days, there was an increase in protein content, also for 5 days. Results: Alertness levelswere assessed before and after the meal in the company and revealed no significant effect during the three conditions. But when these same alert levels were analyzed, taking into account the BMI there was an interaction between BMI above 30kg/m 2 and the level of alert during the week of change in carbohydrate content (p<0.05). The average consumption of calories was 2808 kcal (SD = 568.6). Consumption averages were: 99.1 g protein (SD = 80.9), carbohydrates 291.5 g (sd = 61.7) and 38.4 g fat (SD = 34.9). When compared to the Dietary References Intakes (DRI), it was noted that in relation to calories, more than half of participants had adequate intake, as protein only 11 percent were adequate and 68.5 percent consumed carbohydrates properly, the but not with lipids, because 94.4 percent of participants consumed above this nutrient recommendations. Conclusions: The content of carbohydrates in the evening meal seems to exert an effect on sleepiness among overweight and obese individuals. .