Healthy lifestyles are important during adolescence due to their impact on health-related problems and life expectancy during adulthood. Despite the emphasis on the importance of healthy habits, the high prevalence of breakfast skipping, physical inactivity, and insufficient sleep is reported among adolescents. This study was aimed to investigate the relationship between sleep quality (SQ) and nutritional habits among adolescents of Yazd. This cross-sectional study was conducted among 569 students aged 12–16 years of six high schools in Yazd, Iran, by a multistage random cluster sampling method. Anthropometric data were measured by precise instruments. Nutritional and PA habits were collected by asking some questions. Pittsburgh Sleep Quality Index questionnaire was used to assess SQ. Data were analyzed by SPSS software (version 22). The breakfast skipping and semi-skipping (57.2%), overweight or obesity (37.8%), and insufficient sleep duration (38.9%) were common. Poor SQ was reported in 63.7% of the students, but a significant relationship was not illustrated between SQ with breakfast frequency, weight, breakfast time, and midmorning snack intake. A significant relationship was found between poor SQ with a later bedtime ( p < 0.0001), mild PA ( p = 0.016), late dinner ( p < 0.004), and famine ( p = 0.02). This study highlighted the associations between SQ with dinnertime, bedtime, and PA. Also, a significant association was not reported between the SQ with breakfast frequency, breakfast time, snack consumption, and weight. This study suggested paying more attention to healthy sleep habits during adolescence, apart from guidance for diet and PA during adolescence.

中文翻译：

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青少年睡眠质量与早餐、上午零食、晚餐和体育活动习惯之间的关系：伊朗亚兹德的横断面研究

健康的生活方式在青春期很重要，因为它们会影响成年期的健康相关问题和预期寿命。尽管强调健康习惯的重要性，但据报道，青少年不吃早餐、缺乏身体活动和睡眠不足的发生率很高。本研究旨在调查亚兹德青少年睡眠质量 (SQ) 与营养习惯之间的关系。这项横断面研究是通过多阶段随机整群抽样方法在伊朗亚兹德六所高中的 569 名 12-16 岁学生中进行的。人体测量数据由精密仪器测量。通过提出一些问题来收集营养和 PA 习惯。匹兹堡睡眠质量指数问卷用于评估 SQ。通过SPSS软件（版本22）分析数据。不吃早餐和半不吃早餐（57.2%）、超重或肥胖（37.8%）、睡眠时间不足（38.9%）很常见。63.7% 的学生报告 SQ 较差，但 SQ 与早餐频率、体重、早餐时间和中午零食摄入量之间没有显着关系。发现较差的 SQ 与晚睡 (p < 0.0001)、轻度 PA (p = 0.016)、晚饭 (p < 0.004) 和饥荒 (p = 0.02) 之间存在显着关系。这项研究强调了 SQ 与晚餐时间、就寝时间和 PA 之间的关联。此外，未报告 SQ 与早餐频率、早餐时间、零食消费和体重之间存在显着关联。这项研究建议在青春期除了饮食和体力活动的指导外，还要更多地关注青春期的健康睡眠习惯。