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- 저자 : Eunwook Chang (검색결과 5 건)
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( Hyung-pil Jun ),( Eunwook Chang ) 한국운동생리학회(구 한국운동과학회) 2020 운동과학 Vol.29 No.2
PURPOSE: The purpose of this study was to confirm the kinematic characteristics of overuse leg injuries during gait through a system atic review. METHODS: Electronic databases from 1960 to 2018 were used to search studies. Physiotherapy Evidence Database Scale was used for quality of studies. Effect sizes (ES) of between-groups and its 95% confidence intervals were calculated. RESULTS: Seven studies were selected for review. The average Physiotherapy Evidence Database Scale score was 4.3 of 10-point scale. The ES for maximum rearfoot eversion from 5 studies ranged from -0.34 to 0.67 with 3 of 5 studies statistically significant. The ES of eversion excursion from 4 studies ranged from -0.24 to 2.37 and 3 of 4 studies showed statistically significant. The ES of maximum eversion velocity ranged from 0.29 to 0.38 from all of 2 studies. With abduction, the ES for abduction excursion ranged from -0.04 to 0.35, and 2 of 3 studies revealed statistically significant. The ES of maximum abduction velocity showed statistically significant with the ES of 0.23 and 0.61. However, maximum abduction from 3 studies showed non-significant with ES ranges from 0.00 to 0.62. CONCLUSIONS: The rearfoot motion (eversion) associates with overuse leg injuries during gait more than tibial motion (internal rotation).
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건강한 성인의 대퇴사두근과 햄스트링에 대한 휴대용 초음파기기의 측정자 간 신뢰도
천소울 ( Soul Cheon ),장은욱 ( Eunwook Chang ) 한국운동생리학회(구 한국운동과학회) 2020 운동과학 Vol.29 No.1
PURPOSE: The purpose of this study was to examine the inter-rater reliability of a portable ultrasound device for measuring the muscle thickness of the quadriceps and hamstrings in healthy subjects. METHODS: Thirty-six subjects (20 males, 16 females, age 22.2±2.0 years, mass 67.4±11.3 kg, height 171.7±9.6 cm) participated as subjects and two examiners attended. The thickness of the quadriceps was measured in order of rectus femoris (RF), vastus interme dius (VI), vastus lateralis (VL), vastus medialis (VM), and vastus medialis oblique (VMO). The hamstring thickness was measured in order of biceps femoris (BF), semitendinosus (ST), and semimembranosus (SM). Three measurements were taken for each muscle by one examiner. Using image J software, the average thickness was calculated from the measured image. Pearson’s correlation coefficient was used in order to identify inter-rater reliability, and the statistical significance level was set to p<.05. RESULTS: Pearson correlation coefficient for inter-examiner reliability of ultrasound showed moderate-to-high level for all assessed muscle. In quadriceps, the values were significantly correlated ranged from 0.62 to 0.90 and in hamstrings the value were relatively low with values of 0.57 to 0.68. CONCLUSIONS: The findings of this study indicated that portable ultrasound was a reliable method for measuring the quadriceps and hamstring muscle thickness. Therefore, it could be used as a useful assessment tool in future studies to assess various skeletal muscle thicknesses.
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스포츠 손상관리 시스템의 운영 실태 조사와 시설 이용 만족도 및 관리자의 직무 만족도 조사를 통한 선수 손상관리 시스템의 개선 방향 연구
남혜주 ( Hae-joo Nam ),장은욱 ( Eunwook Chang ) 한국운동생리학회(구 한국운동과학회) 2020 운동과학 Vol.29 No.3
PURPOSE: The purpose of this study was to investigate athletes’ satisfaction of sports injury management system and athletic trainers’ job satisfaction. METHODS: Total of 183 athletes and 30 athletic trainers responded to the survey. The surveys consisted 25 questions for health care satisfaction from athletes. From factor analysis, there were four subfactors 1) Satisfaction with trainer quality, 2) Activity on the role of the trainer, 3) Satisfaction with injury management system service, 4) The necessity of an athletic trainer) from 25 questions. The survey for athletic trainers consisted to 19 questions and there were five subfactors 1) Relationship and communication, 2) Treatment as an athletic trainer 3) Expectation for working environment change, 4) Proud for the job, 5) Anxiety and inequality in the work environ ment). One-way analysis of variance was utilized to compare the differences among subfactors in each category. Independent t-test was used to compare the satisfaction with or without athletic trainers. RESULTS: 1) Athletes’ satisfaction: there was a significant difference between the satisfaction with or without athletic trainers in subfac tor 2 and 3 (p<.01). The satisfaction of injury management system exhibited that subfactor 2 and 3 showed a significance difference by age (p<.05) and subfactor 1, 2, and 3 (p<.01) showed a significant difference by event participations of athletic trainers. 2) Athletic trainers’ satisfaction: There was a significant difference on subfactor 3 (p<.05) between age 20-26 years old. In addition, there was a significant difference on sub factor 3 (p<.05) by type of sports and on subfactor 2 (p<.05) by career span. CONCLUSIONS: A systematic athletic training education program and the vocational welfare environment of athletic trainer will be necessary for providing a better health care services to athletes.
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표면 특성에 따른 다양한 스쿼트 운동 시 하지 근육의 활성도 비교
김수진 ( Soojin Kim ),이주현 ( Joo-hyun Lee ),허지혜 ( Jihye Heo ),장은욱 ( Eunwook Chang ) 한국운동생리학회 2021 운동과학 Vol.30 No.3
PURPOSE: The purpose of this study was to compare thigh muscle activities and muscle co-activation when performing squats, wall squats, and Spanish squats on stable and unstable ground. METHODS: Twenty-two healthy male subjects (age: 22.50±2.70 years, height: 178.72±6.04 cm, mass: 76.50±6.80 kg, body mass index: 24.00±2.10 kg/㎡, and Godin activity questionnaire: 56.30±24.10) voluntarily participated in the study. All of the participants performed three different squat exercises on the floor and the BOSU ball with an electromyograph attached to each participant’s quad riceps (rectus femoris, RF; vastus lateralis, VL; and vastus medialis, VM) and hamstrings (biceps femoris, BF; semitendinosus, ST; and semimembranosus, SM). Repeated measures of analysis of variance were utilized to compare muscle activity during the three squats exercises by floor type. RESULTS: RF (p<.001, η<sup>2</sup>=.689), VL (p<.001, η<sup>2</sup>=.622), and VM (p=.002, η<sup>2</sup>=.375) showed significant differences between exercises. Spanish squats yielded greater BF activity than did wall squats (p=.018, η<sup>2</sup>=.269). ST yielded greater muscle activity with the BOSU ball than on the floor (p=.018, η<sup>2</sup>=.269). Finally, there was a significant ground exercise interaction effect on the co-activation, showing greater muscle co-activation with Spanish squats on the BOSU ball compared to squats, squats on the BOSU ball, and wall squat on the BOSU ball. CONCLUSIONS: The findings of this study indicate that Spanish squats could be an effective exercise option for the facilitation of RF, VL, VM, and BF muscle activation. In particular, performing Spanish squats on an unstable surface could be useful for patients who need to improve their quadriceps muscle activation.
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