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송윤경 ( Yoonkyung Song ),전용관 ( Justin Y. Jeon ) 중앙대학교 학교체육연구소 2021 Asian Journal of Physical Education of Sport Scien Vol.9 No.3
유아들의 신체활동과 좌식행동에 관한 관심이 높아지고 있지만, 국내 연구는 미흡한 실정이다. 본 연구는 최근 우리나라 유아와 관련된 신체활동 및 좌식행동에 관한 문헌을 체계적으로 고찰하고, 연구의 특징과 그 결과를 종합 정리하는 데 그 목적이 있다. 그 결과, 신체활동을 연구한 국내외 연구는 총 14편, 좌식행동/좌식시간을 연구한 국내외 연구는 총 네 편으로 정리되었다. 신체활동과 좌식행동을 조사하는 방법은 크게 두 가지로, 활동 측정기기(예. 보수계, 가속도계 등)와 관찰법을 이용한 직접 측정법과 학부모 또는 보호자가 기입하는 설문지를 이용한 간접 측정법으로 나타났다. 하루 평균 걸음 수로 살펴본 우리나라 유아의 신체활동량은 약 6,000보 내외로 조사되었으며, 우리나라 만 4세의 하루 평균 TV 시청 시간은 1.36시간으로 조사되었다. 하루 24시간의 활동은 크게 신체활동, 좌식행동과 수면으로 이루어지며, 유아들의 활동 조사를 위한 도구의 개발 및 연구가 필요하다. 나아가 유아의 신체활동 및 좌식행동의 독립적 그리고 상호적인 관계를 알아보는 것은 유아의 신체적, 정신적, 사회적 건강을 향상시키기 위해 매우 중요하다. The purpose of this study was to review and summarize the characteristics and results of physical activity and sedentary behavior studies among young children in Korea. Studies on physical activity, sedentary behavior of young children in Korea were searched using academic search engines. A total of 14 studies for physical activity and four studies for sedentary behavior were identified. There were two methods of assessing physical activity and sedentary behavior. One was a direct measurement using activity devices(e.g. accelerometer, pedometer) and observation, and the other was an indirect measurement using a questionnaire filled out by parents or guardians. The level of physical activity of young children was estimated at around 6,000 steps per day, and the average TV viewing time was 1.36 hours per day. It is important to develop and research measuring tools for young children’s physical activity and sedentary behaviors. Furthermore, examining the association between physical activity and sedentary behavior is needed in future research to improve physical, psychological and social health among young children in Korea.
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송윤경 ( Yoonkyung Song ),전용관 ( Justin Y. Jeon ),서상훈 ( Sang-hoon Suh ) 한국스포츠정책과학원(구 한국스포츠개발원) 2017 체육과학연구 Vol.28 No.1
과거에 젖산은 산소 부족으로 인해 근육과 혈액에 축적되어 조직을 손상시키며 피로를 유발한다고 알려져 왔다. 또한, 생성된 젖산은 운동 후 회복기에 글라이코젠 재합성을 위한 초과 산소 소비(산소 부채, oxygen debt)의 원인이 된다고 알려져 왔다. 하지만, 동물과 사람을 대상으로 한 선행연구를 통해 젖산이 휴식과 운동중에 에너지 요구량이 증가할 때, 적절히 에너지를 공급하여 세포 내 ATP의 농도를 정상 수치로 일정하게 유지시키는 중요한 대사물질이라는 것을 알게 되었다. 젖산은 생성된 세포 내에서 이용(세포 내 젖산 셔틀, intracellular lactate shuttle)되거나 세포간질 또는 혈관을 통해 멀리 떨어진 다른 세포로 전달되어 이용(세포 간 젖산 셔틀, cell-cell lactate shuttle)된다. 이러한 젖산 셔틀(lactate shuttle)을 통해 알 수 있듯이 젖산은 휴식과 운동 중, 운동 후 회복 시에 해당작용과 산화적 인산화 과정을 연결하는 중간 매개물질이며 글루코스 신생합성의 전구체이다. 따라서 본 연구는 휴식과 운동 중에 젖산의 생리적 기능 변화 과정과 세포간, 세포 내 젖산 셔틀, 젖산의 임상적 활용에 대한 선행 연구를 고찰함으로써 젖산대사에 대한 최신 지견을 파악하고 그 이해도를 높이는데 그 목적이 있다. Lactate was considered a dead-end waste product of glycolysis due to lack of oxygen. Accumulating lactate in the muscle and blood was viewed only as a major cause of muscle fatigue and tissue damage. Furthermore, buildup of lactate due to glycogen re-synthesis is thought to cause excess oxygen consumption (oxygen debt) after exercise. However, research has also shown lactate to be an important mediator in numerous metabolic processes and a fuel for aerobic metabolism. Lactate is not metabolic waste, but a major player in cellular and whole body metabolism. Lactate can be used within the cell (intracellular lactate shuttle) or be transported through the cytoplasm or blood to be used by other cells (cell-cell lactate shuttle). Lactate shuttle hypothesis has helped in identifying and understanding the link between the glyoclyic and oxidative pathways, and identified lactate as a major energy source and gluconeogenic precursor. Therefore, the purpose of this review was to better understand the physiological roles of lactate at rest and during exercise, and the concept of lactate shuttle with implications for clinical practice.
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한국 여자 청소년의 조기성숙과 비만에 따른 학교 스포츠클럽 참여와 좌식행동과의 관계
송윤경(Yoonkyung Song),이은영(Eun-Young Lee),전용관(Justin Y. Jeon) 한국발육발달학회 2017 한국발육발달학회지 Vol.25 No.3
The purposes of this study were to examine associations between precocious puberty and obesity with participation in school-based organized sports and sedentary behavior among South Korean adolescent girls. Data from a population sample of 68,429 South Korean adolescent girls (12-18 years) who participated in 2014-15 Korea Youth Risk Behavior Web-based Surveys were analyzed using hierarchical multivariate logistic regression analysis. Results are expressed as odds ratio (OR) and 95% confidence intervals (95% CIs). Precocious puberty was associated with obesity. BMI moderated the associations between (1) precocious puberty and participation in organized sports (OR=1.10, 95% CI: 1.02-1.20), (2) precocious puberty and sedentary behavior (OR= 1.08, 95% CI: 1.01-1.15), and (3) precocious puberty and internet use (OR=1.22, 95% CI: 1.12-1.33). Developing structured physical activity programs in a school setting and limiting recreational sedentary behavior and internet use should be targeted by different levels of pubertal development and weight status.
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송윤경(Song, Yoonkyung),이은영(Lee, Eun-Young),전용관(Jeon, Justin Y.) 한국사회체육학회 2021 한국사회체육학회지 Vol.- No.86
Purpose: The purpose of this study is to investigate the current status of physical activity participation of Korean children and adolescents in six sub-indicators in accordance with the Report Card on Physical Activity for Children and Youth frame ahead of the 2022 Global Matrix 4.0. Method: This presented the results of peer-reviewed papers identified by a systematic search of the literature written in Korean or English and government reports. Then the Korea Youth Risk Behavior web-based Survey and Panel Study on Korean children were used as preferred sources of data. The collected results were analyzed according to the indicators and benchmarks set by Active Healthy Kids Global Alliance. Results: The proportion of children and adolescents in Korea was high in active transportation and physical fitness while the proportion of children and adolescents participating in organized sports and physical activity was moderate level, but sedentary behavior, overall physical activity and active play were low. Family and peers, school, community and built environment, and government& investment have not been investigated due to lack of available evidence. Conclusion: Although Korean children and adolescents showed various participation rates in the field of physical activity, most Korean children and youth were not physically active. More evidence and effort at the national level are required for the comprehensive assessment of indicators, and more support and government investment are needed to improve in all indicators.
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