• Title/Summary/Keyword: 최대근력

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The study was to investigate the Spontaneous therapy, TENS and Ice therapy of Biceps brachii after induction of DOMS (자연치유와 경피신경전기자극치료, 그리고 냉치료가 지연성근육통이 유발된 위팔두갈래근의 통증과 근력 및 근활성도에 미치는 영향)

  • Kim, Keun-Jo;Lee, Cu-Rie;Jung, Byeong-Ok;Bang, Hyun-Soo
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.10 no.12
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    • pp.3902-3909
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    • 2009
  • The purpose of this study was to investigate the spontaneous therapy, TENS(transcutaneous electrical nerve stimulation) and ice therapy after induction of DOMS(delayed onset muscle soreness) through application of eccentrically exercise in ralation to biceps brachii muscle of opposite-dominance. And to explain this, we analyzed VAS(visual analogue scales), peak torque, RMS(roots mean square) when exercising elbow joint. The subjects were 30 adults without any physical defect. Subjects were divided into three groups that spontaneous therapy, TENS therapy and ice therapy after DOMS induction, choosen movement could get the maximal peak torque in angular velocity of $60^{\circ}$/sec, and mearsured peak torque, RMS and VAS. 1. The VAS was significantly decreased after 3 days application of TENS than other groups(p<.05). 2. The peak torque was significantly increased after 3 days application of TENS than other groups(p<.05). 3. The RMS was significantly increased after 3 days application of TENS than other groups(p<.05). This study showed that TENS therapy application were effective treatment strategy on DOMS than spontaneous therapy and ice therapy. Therefore, it could be considered as a treatment method in the patients with DOMS.

Comparison of the Thigh Composition and its Functional Contractility in Obese and Nonobese Elderly Patients (일반노인과 비만노인의 대퇴부 근육량과 근력비교연구(Intermuscular fat을 중심으로))

  • Choi, Seung-Jun;Park, Sung-Mo;Kwak, Yi-Sub
    • Journal of Life Science
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    • v.24 no.10
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    • pp.1125-1131
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    • 2014
  • The purpose of this study was to investigate the relationship between quadriceps composition and its functional contractility in obese and nonobese elderly individuals. Thirty-four ($70{\pm}2yr$) individuals (obese, n=21; nonobese, n=13) participated in the study. The thigh composition was assessed with a CT scan, and its functional contractility was measured with an isotonic dynamometer. Variables were analyzed with a $2{\times}2$ two-way ANOVA and a contrast test (p<0.05). There were no between-group differences in the subjects' ages and heights, but individuals in the obese group were approximately 23% heavier and had 18% more fat than those in the nonobese group, regardless of gender. The total thigh volume of the obese elderly was greater (~29%) than that of the nonobese elderly, regardless of gender, and the fat volume (~39%) of the obese elderly was greater than that of the nonobese elderly, regardless of gender (p<0.05). Interestingly, the obese elderly tended to have a greater thigh muscle volume (~17% for males [p<0.05] and ~10% for females) than the nonobese. Despite the greater muscle volume, the peak knee extensor torque of the two groups was comparable or slightly greater in the obese individuals. However, when this was normalized by the total thigh volume, the nonobese males showed significantly greater peak torque (~26% for right and ~20% for left; p<0.05) compared to the obese males. The nonobese females also showed greater peak torque (~8% for both legs) than the obese females after normalization, but the result was not statistically significant. In conclusion, although the obese elderly individuals had greater quadriceps muscle mass than the nonobese, the normalized peak torque of the obese was significantly lower than that of the nonobese, implying a lower degree of muscle contractility.

Arthroscopic Reconstruction of Posterior Cruciate Ligament with Achilles Tendon Allograft (동종 이식 아킬레스 건을 이용한 관절경적 후방 십자 인대 재건술)

  • Kim, Kyung Taek;Sohn, Sung Keun;Lee, Dae Hee
    • Journal of the Korean Arthroscopy Society
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    • v.3 no.1
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    • pp.9-16
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    • 1999
  • Purpose : We have evaluated the outcome of the operative treatment of PCL rupture using the achilles tendon allograft. Materials and Methods : A retrospective study was completed for 30-PCL reconstruction cases, using the achilles tendon allograft from september 1996 to march 1998. There was an average follow up of 24 months, with range of 12 to 50 months. Results : The active range of motion was improved postoperatively. The Lysholm Knee Score was improved from a mean of 54 points preoperatively to 87 points postoerative 18 months. The "Cybex 340 isometric test" revealed satisfactory results compared with autograft. Conclusions : Use of allograft for recostruction of the PCL is an attractive option because it precludes the harvesting of autogenous tissue in a knee that is already at risk for patellofemoral and tibiofemoral osteoarthrosis.

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Pre-seasonal Physical Examination of Professional Soccer Team (프로 축구팀의 시즌 전 체력검사)

  • Lee, Kyung-Tai;Choi, Byung-Ok
    • Journal of Korean Orthopaedic Sports Medicine
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    • v.5 no.2
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    • pp.129-134
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    • 2006
  • Purpose: In the professional soccer team, we performed pre-seasonal physical examination and analyzed the results to establish a standardization data in relation to their position. Materials and Methods: We performed physical examination to the professional soccer team, consisted 34 player's average age 24.9 years. The examination performed were questionnaire on history, musculoskeletal examination, muscle power test, physiologic test, functional test. Results: According to the relationship between player position and injury pattern,. Knee injuries are most frequent on history. Physical examination outcome was that forward were prone to flexor hallucis longus tendinitis, midfielder for chronic ankle instability, defender for achilles tendinitis. Isokinetic test was done at dominant side, Peak torque to body weight ratio was 55.1%. Physiologic test checked body fat percentage was midfielder was superior as 19.8 (SD 2.9). Functional test out-come was that back strength 125 N. sergeant jump 59.6 cm, reaction time 208.5 sec, flexibility 19.2 m/s, side step 39.9 cm. Conclusion: Pre-seasonal physical examination gave us the standardization data and preventive measurement could be advocated from this results.

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Effects of Elbow Ulnar Collateral Ligament Injury on Differences in Maximal Isometric Strength of Upper body in Young Baseball Pitchers (주니어 투수들의 팔꿈치 안쪽 곁인대 손상이 상지 근육의 최대등척성수축력 차이에 미치는 영향)

  • Jang, Sehong;Kim, Donghee
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.17 no.10
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    • pp.628-634
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    • 2016
  • Many pitchers suffer from various types of injury (distortion, sprain and so on). The rate of injury is increased if there are differences in strength between the extensor and flexor muscles when a joint movement is performed with maximum speed. However, there has been insufficient research into the injury caused by strength differences between the extensor and flexor muscles. Thus, the purpose of the study was to examine the effects of elbow ulnar collateral ligament injury on the maximal isometric strength in young baseball pitchers. The data collection was conducted for 2 weeks. The subjects (n=36) who participated in this study were placed into either the injury group (n = 18, IG) or normal group (n = 18, NG). The maximal isometric strength for the pectoralis major (PM), infraspintus (I), biceps brachii (BB), triceps brachii (TB), flexor carpi radialis (ECR) and extensor carpi radialis (FCR) muscles were determined by an isometric strength machine (K-DFX) and then the differences in strength were calculated by muscle group. All of the data were analyzed by SPSS 18.0 with the independent t-test. In the results, the maximal isometric strengths in the IG for the I (p=0.035), BB (p=0.031) and TB (p=0.041) were significantly lower than those in the NG, while that for the ECR (p=0.047) was significantly greater. In addition, the differences of the maximal isometric strength between the PM and I (p = 0.008), BB and TB (p = 0.002), and FCR and ECR (p = 0.032) in the IG were significantly greater than those in the NG. In conclusion, the differences in muscle strengths of the subjects in the IG were greater than those in the NG, which suggests that they might have a higher injury rate in the future. However, they might be able to recover from their injury and achieve better performance if the differences in strength were reduced by training.

A Analysis of Isotonic Torque of Shoulder Joint for Overthrow Pitcher of Professional Baseball Player (프로야구 오버드로우 투수의 견관절 등속성 토크에 관한 분석)

  • So, Jae-Moo;Kim, Young-Il;Kim, Hyo-Eun
    • Korean Journal of Applied Biomechanics
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    • v.12 no.2
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    • pp.295-306
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    • 2002
  • The purpose of this study was analysis inter relative the ball velocity and isotonic torque of shoulder joint. The subject were twelve overthrow pitcher of professional baseball player. The measurement was used Cybex 6000. The results of this study were as follows : 1. As the siting position of maximal adduction torque of dominant, A group was higher than B group. As the non-dominant, B group was higher than A group for improved angular velocity. There is no significance difference between group. 2. As the siting position of maximal abduction torque of dominant and non-dominant, B group was higher than A group for all measurement. There is no significance difference between group. 3. As the layed position of maximal internal torque of dominant, A group was higher than B group. As the non-dominant was just higher at $180_{\circ}$/sec than B group, B group was higher at $60_{\circ}$/sec and $300_{\circ}$/sec than A group. There is no significance difference between group. 4. As the layed position of maximal external torque of dominant and non-dominant, A group was more higher than B group for all measurement. There is no significance difference between group. 5. As the standing position of maximal internal torque of dominant, A group was just higher at $60_{\circ}$/sec than B group, B group was higher at $180_{\circ}$/sec and $300_{\circ}$/sec than A group. As the non-dominant, B group was higher than A group. There is no significance difference between group. 6. As the standing position of maximal external torque of dominant, A group was higher $60_{\circ}$/sec and $180_{\circ}$/sec than B group. But B group was higher $300_{\circ}$/sec than A group. As the non-dominant, B group was higher than A group. There is no significance difference between group.

Impact of concurrent inspiratory muscle and aerobic exercise training on pulmonary function and cardiopulmonary responses (흡기근육 훈련과 유산소운동의 동시적용이 심폐반응과 폐기능에 미치는 영향)

  • Jung, H.J.;Lee, D.T.
    • Exercise Science
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    • v.21 no.3
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    • pp.373-384
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    • 2012
  • The effects of inspiratory muscle training in conjunction with aerobic exercise on inspiratory muscle strength, pulmonary function, and maximal oxygen uptake(VO2max) were examined. Twenty four healthy collegiate men were divided into three groups; respiratory muscle training group(RTG; n=8), running exercise group(REG; n=8), and both respiratory muscle training and running group(BTG; n=8). Their pulmonary function, maximal inspiratory pressures(PImax), and VO2max were assessed before and after intervention. RTG underwent inspiratory muscle training(IMT) with load set to 50 % of PImax, 30 times per session, twice a day, 4 days a week REG ran on a treadmill at 70-75 % of VO2max for 30 min a day, 4 days a week. BTG participated both IMT and the running exercise. Participant's anthropometric parameters and pulmonary function were not changed. VO2max increased by 6.1±3.3 %, 5.9±6.6 %, and 10.0±8.3 % in RTG, REG, and BTG, respectively(p< .05), and PImax also increased by 21.7±14.3 %, 19.7±12.0 %, and 27.0±12.1 % in RTG, REG, and BTG, respectively, but no group differences were found. Based on the study, although statistically insignificant, BTG showed the biggest increase of VO2max and PImax indicating a possible synergic effect of inspiratory muscle training and aerobic exercise on respiratory responses.

The Relationship of One Repetition Maximum between Flat Bench Press Exercise and Incline Bench Press Exercise (플랫 벤치프레스 운동과 인클라인 벤치프레스 운동 간의 최대근력 관계)

  • Lim, Kyu-Chan
    • Korean Journal of Applied Biomechanics
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    • v.16 no.4
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    • pp.189-194
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    • 2006
  • The purpose of this study was to identify the relationship of one repetition maximum between flat bench press exercise and incline bench press exercise, and so 40 male students of U-university were sampled purposedly, who were skilled in flat bench press and incline bench press exercises. After measuring lRM of each exercise by free barbell weight, the correlation analysis and the simple regression analysis were examined by using SPSS 120 at a significance level .05. The conclusions were as follows; Firstly, it was identified that 1RM of flat bench press exercise and incline bench press exercise were $89.2{\pm}25.9kg$, $67.1{\pm}22.1kg$ respectively, and the coefficient of correlation between two variables was 0.969, so the relationship was positive correlation. Secondly, it was identified that the regression equation predicted 1RM of incline bench press exercise was significant actually and statistically, so it was expressed that the equation was -6.648 + 0.827 (1RM of flat bench press exercise).

The Scientific Research of Rehabilitation Training Program Participants in Stroke Patients (재활운동에 참가한 뇌졸중환자의 운동과학적 연구)

  • Jin, Young-Wan
    • Journal of Life Science
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    • v.20 no.11
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    • pp.1704-1710
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    • 2010
  • The purpose of this study was to describe the biomechanical characteristics of stroke patients. These characteristics were obtained during walking on a Zebris system, cinematography system and EMG system. Seven female stroke patients participated in this study. The magnitude of the profiles (joint peak angle, joint peak moments, foot pressure COP, EMG data) correlated with rehabilitation training duration using t-test. The significance level selected for this study was p<0.05, t-test. Joint analysis identified significant differences in hip joint peak angle and hip joint peak moment. Foot pressure verified significant differences in gait line length of COP. The EMG signal proved significant differences in rectus femoris and vastus lateralis.

A Study on the Load and Deformation of Race Carbon Bicycle Frame for Improved Athletic Performance (경기력 향상을 위한 경주용 탄소 자전거 프레임의 하중과 변형에 관한 연구)

  • Choi, Ung Jae;Choi, Seung Ho;Kim, Yong Sun;Yun, Seong Min;Kim, Hong Gun
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.18 no.1
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    • pp.46-51
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    • 2019
  • As the industry develops and quality of life increases, the concept of leisure is also changing. Bicycling is a healthy sport for exercising while enjoying nature, facilitating the enjoyment of a healthy life. As a result, the awareness surrounding bicycles has increased, and so has the interest in lighter and more luxurious carbon bikes. The number of domestic companies producing carbon bicycles frames is nil. In this study, we analyze the frames of existing foreign brands and analyze the deformation and stress concentration area according to the load of the frame, using the finite element analysis. In addition, we set up the range of stiffness based on the content of the structural analysis, to localize the carbon bicycle frame and famous foreign products, and compare the prototype with the stiffness by using bicycle molds for track races.