The purpose of this study was to explore the association between the high perceived stress of adults and the types and amounts of their physical activities.

The subjects consisted of 5,624 adults aged 20 and older from the 2017 Korean National Health and Nutrition Examination Survey data. The three types of physical activity (aerobic activity, muscular exercise and walking) were investigated and the amounts of physical activity were calculated with time used in each activity were calculated. To examine the association between the high perceived stress and physical activity, complex samples multiple logistic regression analyses were performed with controlling participants’ demographic and socio-economic, health status and health behavior characteristics.

There were 1,539 people (27.36%) in the high stress perceived group, and the subjects in the high stress perceived group seemed to perform less time to walking (weighted mean: 217.23 minutes/ week) than the low or not stress perceived group (weighted mean: 241.09 minutes/week). The proportion of subjects doing muscular exercise 3 or more days in a week seemed to higher in the lower stress perceived group than the high stress perceived group. The multiple logistic regression analyses results showed significant correlations between walking or doing muscular exercise and high-perceived stress (p<0.01). Additionally, the proportion of activity at work seemed to be a significant factor in the perceived stress level.

There appears to be a correlation between physical activity especially muscular activity and perceived stress, such that further studies will lead to improvements in stress management strategies.

A number of studies have documented relationship between various individual outcomes and birth order. This study sought to investigate the relationship between adolescents health behavior, stress and birth order.

The data used in this study were obtained middle and high school students who replied to the 10th Korea Youth Risk Behavior Web-based Survey (KYRBWS) administered in 2014. We investigated the associations between health behavior, stress and birth order using multivariable logistic regression analysis controlling with age, height, weight, father’s education, mother’s education, economic status, academic status, sleep duration, sitting time, self-perceived health status, self-perceived happiness, depression mood, suicide idea, suicide plan, suicide attempt, drinking experience, smoking experience.

The distribution of first-born was 45.5% and later-born was 54.5%. In multivariable logistic regression the later-born replied higher portion of vigorous physical activity 3 days per week and strength exercise 5 days per week. And later-born replied lower economic status, lower academic performance and higher prevalence of drinking experience, smoking experience. Later-born they had more stress than first-born, but after adjusted for variable factors in multivariable logistic regression, birth order had no relationship with stress significantly.

This study offers data for the development of intervention programs to adolescent related to birth order, and further study is necessary in order to clarify adolescent’s relationship between birth order and stress and individual outcomes.