The Association between Physical Activity, Leisure Time Sedentary Behavior, and Self-Rated Health in Korean Adolescents: Findings from the Korea Youth Risk Behavior Survey

Purpose : The purpose of this study was to examine the association between physical activity (PA), leisure time sedentary behavior (LTSB), and self-rated health (SRH) in Korean adolescents. Methods: A cross-sectional analysis was conducted on 53,510 Korean middle and high school students from the Korea youth risk behavior survey, 2020. Complex samples logistic regression was […]

A Flexible Lightweight Triboelectric Nanogenerator for Protector and Scoring System in Taekwondo Competition Monitoring

Nowadays, the applications of the triboelectric nanogenerator in sensing and monitoring sports experience a blooming prosperity. Here, we report a flexible and lightweight triboelectric nanogenerator (FL-TENG) made of hydrogel electrodes, polytetrafluoroethylene (PTFE), PDMS, and polyurethane (PU). Based on the triboelectric effect, the FL-TENG can work as a self-powered sensor attaching to taekwondo protective gear, which […]

코로나-19 전후 올림픽대회 육상 상위선수들의 종목별 기록과 체격 비교

본 연구에서는 코로나-19 이전의 2016년 리우 올림픽대회와 코로나-19 이후의 2020년 도쿄 올림픽대회에 참가한 육상 세부종목별 상위선수를 대상으로 기록 및 체격의 차이를 분석하고자 하였다. 분석대상으로는 2016년 리우 올림픽대회와 2020년 도쿄 올림픽대회에 참가한 육상 세부종목별 상위 1~8위까지의 선수로 한정하였다. 기록, 신장, 체중, BMI, 나이를 분석하였다. 연구결과, 남자의 경우, 기록 변인에서는 400mH(p=.040*), 800m(p=.009**), 1,500m(p<.001***), 5,000m(p=.003**), 10,000m(p<.001***), 20km Race […]

BMI 수준이 한국 남녀노인의 체력수준에 미치는 영향

본 연구는 국민체육진흥공단 국민체력 100팀의 빅데이터에 기반하여 국민체력 100에 참여한 65세 이상 노인 총 218,846명(남자 74,269명, 여자 144,577명)을 대상으로 BMI 수준에 따른 체력의 차이를 분석하는 데 그 목적이 있다. 체중과 신장을 통해 BMI를 산출하였고, BMI 수준에 따라 저체중, 정상체중, 과체중, 비만, 고도비만으로 그룹을 나누었다. 체력변인으로는 상지근기능(상대악력), 하지근기능(의자에 앉았다 일어서기), 평형성(의자에 앉아 3m 표적 돌아오기), 협응력(8자보행), […]

Differences in Blood Pressure and Obesity According to the Physical Fitness Level for Korean Older Persons: Considering Data from the National Fitness 100

PURPOSE High blood pressure and obesity pose significant health problems for older individuals. Previous studies showed that regular exercise improves physical fitness factors and decreases blood pressure and obesity. Therefore, this study investigated differences in blood pressure and obesity according to the physical fitness level of Korean older individuals using the National Fitness 100 data […]

Reliability and Validity of the Kinect-Based Mixed Reality Device: Pilot Study

OBJECTIVES Firefighter (FF) is an occupation which needs high fitness abilities. However, most of Korean FFs in the capital city have relatively low fitness levels and they have difficulty participating in exercises owing to their emergency environments. Kinect-based mixed reality device (KMR) is a device that can deliver exercises with live visual feedbacks by detecting […]

Muscle fiber type-dependence effect of exercise on genomic networks in aged mice models

Skeletal muscles are made up of various muscle fiber type including slow and fast-twitch fibers. Because each muscle fiber has its own physiological characteristics, the effects of aging and exercise vary depending on the type of muscle fiber. We used bioinformatics screening techniques such as differentially expressed gene analysis, gene ontology analysis and gene set […]

The Effects of External Vibration on Coordination Strategies of Multi-Muscles during Voluntary Isometric Torque Production

PURPOSE To investigate the effect of muscle vibration on performance accuracy and multi-muscle coordination pattern during voluntary isometric knee extension torque production. METHODS The subjects were tested under two conditions of external vibration frequencies (90 Hz vibration (VIB)&no-vibration (NVIB)) with three levels of torque magnitudes of 20% (MVT20), 40% (MVT40), and 60% of maximal voluntary […]

Decoupled control of grasp and rotation constraints during prehension of weightless objects

Gravity provides critical information for the adjustment of body movement or manipulation of the handheld object. Indeed, the changes in gravity modify the mechanical constraints of prehensile actions, which may be accompanied by the changes in control strategies. The current study examined the effect of the gravitational force of a handheld object on the control […]