Quality of Sleep and Heart Rate Variability by Physical Activity in High School Students

Abstract

This study was done to investigate quality of sleep and heart rate variability by the physical activity in high school students. Methods: A survey that measures physical activity and quality of sleep was distributed to 118 students at Y high school. Heart rate variability was obtained using the LXC3203 heart rate monitor. The data of 105 students were analyzed using descriptive statistics, t-test, x 2-test, and ANOVA with Scheffé test. Results: Boys and students with part-time jobs had significantly higher physical activity. The quality of sleep was significantly high when the students were non-smokers, felt healthy, happy, less stressed, and satisfied with their school lives. Mean heart rate was significantly higher among girls, and standard deviation of normal to normal R-R intervals were high in boys. Physical activity had no significant relationships with quality of sleep and heart rate variability. Conclusions: Physical activity should be encouraged for high school students, especially for girls. An experimental study with different intensity and time of physical activity is recommended to examine the relationships with quality of sleep and heart rate variability in the future.

The Pittsburg Sleep Quality Index (PSQI) and Associated Factors in Middle-school Students: A Cross-sectional Study

“…Poor sleep quality has important effects on adolescents' health. For example, sleep quality is associated with physical and emotional growth [8], learning and academic performance, and cognitive functions [9]. Middle school and high school require more complex academic tasks, but adolescents with chronic sleep deprivation and short sleep duration may experience poor daytime functioning and academic performance [10].…”

“…A study revealed that mobile phone addiction affected sleep quality among Korean adolescents, but did not impact sleep duration [11]. Other factors, such as not smoking and feeling healthy, happy, and satisfied with their school lives, were significantly associated with sleep quality among adolescents [8].…”

“…Another study found that the number of comorbid conditions, which was also associated with a high hospital admission rate, affected sleep quality among adults [14]. Some studies have examined health-related factors affecting sleep quality among adolescents, such as physical activity [8] and overweight and obesity [15], as well as the effects of certain diagnoses, such as atopic diseases [16], asthma [17], fatigue, and health-related quality of life [18]. However, the relationships between other health-related factors (e.g., hospital admissions and number of diagnoses) and sleep quality have not been widely investigated among adolescents.…”

Factors Influencing Sleep among Korean Adolescents: Using Data from the 7th-8th Korea National Health and Nutrition Examination Survey, 2016-2020

“…특히 우리나라 청소년은 학년이 올라가면서 대학입시 정책에 따 른 내신성적 관리 및 수능을 비롯한 대학차원에서의 시험대비 등 에 따른 학업량의 가중과 더불어 수면시간이 부족해지고 만족스러 운 수면을 취하지 못하고 있다 [7]. 따라서 청소년의 수면 부족은 심 각한 상태이며, 부적절한 수면으로 인해 스트레스가 높아지며, 자 살생각 등의 부정적 영향을 미치는 것으로 나타났다 [8].…”