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크로스핏 트레이닝이 초등학생 건강체력 및 골밀도에 미치는 영향
강민성 ( Kang Min Seung ),김경래 ( Kim Kyoung Lae ),안민지 ( An Min Ji ),류현승 ( Rhyu Hyun Seung ) 서울敎育大學校 初等敎育硏究所 2016 한국초등교육 Vol.27 No.4
본 연구의 목적은 크로스핏 트레이닝이 초등학생 건강체력 및 골밀도에 미치는 영향을 알아보고, 크로스핏 트레이닝 프로그램을 통한 건강체력 향상 및 골밀도 증진을 위한 기초 자료를 제공하는 데 있다. 연구의 목적을 달성하기 위해 초등학생을 대상으로 운동집단 14명과 비교집단 14명을 선정하여 크로스핏 트레이닝 처치 전·후의 건강체력과 골밀도를 측정하였다. 자료분석은 집단 내 운동처치 유무에 따른 평균 차이 검증과 집단 간 평균 차이를 검증 하기위해 SPSS 18.0 통계 프로그램을 활용하여 t-검증으로 분석하였다. 본 연구의 결과는 다 음과 같다. 첫째, 12주 간 크로스핏 트레이닝은 초등학생들의 근력, 근지구력, 심폐지구력, 유연성, 체지방률의 개선에 많은 도움이 되었다. 둘째, 12주 동안의 크로스핏 트레이닝 후 골밀도 측정결과 운동집단에서 통계적으로 유의하게 증가하였다. 결론적으로, 12주간의 크로스핏 트레이닝은 초등학생의 건강체력 향상 및 골밀도 증진에 도움을 주었다. This study was to investigate the effect of Crossfit training on the health related physical fitness and bone mineral density in the Elementary School Students and to provide information for improvement on physical fitness in health and bone density through Crossfit training program. To achieve this purpose, subjects of study were divide into exercise group(n=14) and control group(n=14) measuring their health related physical fitness and bone mineral density before and after Crossfit training. To find out the difference in the average according to the motion treatment presence using SPSS 18.0 statistical program, the difference of before and after training within the group analyzed paired t-test whereas the difference between the groups was analyzed independent t-test through the change of before and after the results. The results of the study were as follows. First, 12-week Crossfit training was a good help in improvement on muscular strength, muscular endurance, cardiovascular endurance, flexibility and percentage of body fat of student. Second, the results of measure bone density measuring after Crossfit training showed significant changes statistically for exercise. In conclusion, the 12-week Crossfit training significantly improved the health related physical fitness and bone density of elementary students. Taking into consideration the various effects on growing children by doing Crossfit training, the training can be developed for suitable shape and intense for children in the future.
젊은 성인의 평지 및 트레드밀 보행 시 Stride Time의 변화성
최진승 ( Jin Seung Choi ),강동원 ( Dong Won Kang ),방윤환 ( Yun Hwan Bang ),강민성 ( Min Sung Kang ),탁계래 ( Gye Rae Tack ) 한국스포츠정책과학원(구 한국스포츠개발원) 2011 체육과학연구 Vol.22 No.1
이 연구의 목적은 평지와 두 가지 조건의 트레드밀 보행 시 보행 변화성의 영향을 살펴보는 것이다. 근골격계 이상이 없는 9명(24.6±1.1 year, 175.2±4.8 cm, 68.4±6.5 kg, right-handed)이 실험에 참여하였다. 모든 피험자는 평지 (overground walking, OW), 일반적으로 속도가 고정된 트레드밀(FT), 자동적으로 보행자의 걷는 속도와 트레드밀의 속도를 맞춰주는 속도 자동 적응형 트레드밀 (AT)에서 각 10분씩 보행을 수행하였다. stride time을 이용하여, 평균 stride time, 분산계수(coefficient of variance, CV) DFA(detrended Fluctuation Analysis)를 구하여 분석하였다. 분산계수는 변화의 크기를 정량적으로 나타내며, DFA는 변화의 구조, 즉 자기유사성을 나타낸다. 그 결과, OW와 AT조건보다 FT조건의 CV가 통계적으로 유의하게 작았고, DFA는 OW조건에서 다른 조건에 비해 작은 값을 보였다. 따라서, 보행 변화성에 대한 연구자의 관심 영역이 보행 변화성의 크기 또는 구조적인 것인가에 따라 적절한 보행 실험조건의 선택이 필요하다. The purpose of this study is to evaluate an effects on gait variability by overground and two kinds of treadmill walking. Nine male subjects (24.6±1.1 year, 175.2±4.8 cm, 68.4±6.5 kg, right-handed) with no neuromuscular disease were participated for this experiment. All subjects walked at the preferred (self-selected) walking speed for 10 minutes on three walking conditions: overground (OW), traditional treadmill by fixed speed (FT) and treadmill whose speed adjusted automatically by subject`s walking speed (AT). Using stride time, average stride time, Coefficient of variance (CV) which quantifies the amount of variability and Detrended Fluctuation Analysis (DFA) which explains the structure (i.e. self-similarity) of the variability were used for analysis. The results revealed that FT condition was a smaller than OW and AT condition in CV of stride time, while in DFA of stride time, OW condition was a smaller than the other conditions. Therefore, it is necessary to select for suitable walking condition of overground or 2 types of treadmill depends on what interest researcher do: such as amount or structure of gait variability.
Biorenovation 생물전환 기법을 이용한 비트 추출물의 LPS로 유도된 RAW 264.7 세포에 대한 항염증 효과
홍혜현(Hyehyun Hong),박태진(Taejin Park),강민성(Min-Sung Kang),김승영(Seung-Young Kim) 한국생물공학회 2021 KSBB Journal Vol.36 No.2
Biorenovation is a method of modifying the structure of a wide range of substrates such as chemical compounds and plant extracts by microbial enzymes, which can reduce cytotoxicity and improve biological activity. In this study, biorenovation was applied to Beta vulgaris (BV) to produce biorenovation product (BVB), and anti-inflammatory activity was investigated in lipopolysaccharide (LPS)-stimulated RAW 264.7 macrophages. As a result, BVB inhibited nitric oxide (NO) production at a non-toxic concentration in a concentration-dependent manner, and inducible nitric oxide synthase (iNOS), cyclooxygenase-2 (COX-2) and pro-inflammatory cytokine interleukin-6 (IL-6), prostaglandin E₂ (PGE₂), interleukin-1β (IL-1β). Our study shows that BVB exhibits anti-inflammatory activity by inhibiting the production of various inflammatory mediators. Moreover, it suggests that biorenovation has potential usefulness in the development of anti-inflammatory drugs.
Biorenovation 공법을 활용한 광나무 추출물의 미백 효과
심지한(Ji Han Sim),이경미(Kyung-Mi Lee),박태진(Taejin Park),강민성(Min Sung Kang),홍혜현(Hyehyun Hong),김승영(Seung-Young Kim) 한국생물공학회 2021 KSBB Journal Vol.36 No.1
Biorenovation is a microbial enzyme-based structural modification of component compounds in natural products and synthetic compounds including plant crude-extracts with the potential benefits of reduced cytotoxicities and improved biological activities compared with its reaction substrates. In this study, we examined the whitening effect of Ligustrum japonicum (LJ) and LJ biorenovation extract (LJBR) in α-MSH-stimulated B16F10 melanoma cells. In the non-toxic concentrations of 25, 50, and 100 μg/ml, the inhibitory effect of LJ and LJBR on melanin synthesis and tyrosinase activity was observed. LJBR exhibited a stronger inhibitory effect on melanin synthesis and tyrosinase activity relative to its reaction substrate LJ. In addition, the protein expression level of MITF, TRP-1, TRP-2, and tyrosinase, which are known to play a critical role in melanin synthesis, was measured. As expected, a greater inhibitory effect on melanogenesis was observed in LJBR than in untreated group. These findings strongly suggest that biorenovation can assist the generation of a novel skin-lightening material.