• Title/Summary/Keyword: Isotonic Torque

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The Effect of Combined Exercise Training to Knee Joint Isokinetic Muscular Function in the Taekwondo Athlete (복합운동처치가 태권도 선수의 슬관절 등속성 근 기능에 미치는 영향)

  • Choi, Kyung-Suk
    • Journal of Life Science
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    • v.18 no.1
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    • pp.30-37
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    • 2008
  • The purpose of this study was to investigate the effect of Isotonic Training and Isotonic isometric complex Training to Knee joint Isokinetic muscle function in the high-school Taekwondo athlete. This subjects were randomly divided into two groups; a Isotonic Training group (n=7) Isotonic isometric complex Training group (n=7), Taekwondo athletes share each, 12 weeks between executes a motion. peak torque, H/Q ratio, bilateral muscular ratio muscular endurance of knee joint measured. For this study, two-way ANOVA with repeated measure were used. The result of this study presents between groups was not plain difference expressed. H/Q ratio, bilateral muscular ratio, muscular endurance was plain difference expressed after 12 weeks point of time (p>0.05) and peak torque was plain difference expressed (p<0.05). Conclusion each group did not appear all but one (peak torque), but point of view exercise was effect H/Q ratio, bilateral muscular ratio, muscular endurance, peak torque plain difference expressed.

The Comparative Study with Isokinetic and Isotonic Exercise Knee Joint Involved Side in Hemiplegia Patients (편마비 환자들의 환측 슬관절 중심으로 등속성 및 등장성 운동 비교연구 -Cybex II+ Isokinetic Dynamometer를 이용한 평가를 기준으로-)

  • Chae, Soo-Sung;Jun, Gun-Sik;Moon, Sung-Ki
    • Journal of Korean Physical Therapy Science
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    • v.1 no.1
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    • pp.165-173
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    • 1994
  • The purpose of this study was to find out the effect of muscular strength of quadriceps, hamstring of knee joint to isokintic, isotonic exercise treatment in stroke. Data was collected from 80 stroke from January 10. 1994 to april 10, 1994 in a Chungnam university hospital. The results were as follows; 1. Peak torque was higher isokinetic than isotonic excercise group both in quadriceps and hamstring of knee joint, 6 weeks, 8 weeks 10 weeks showed statistically significant in isokinetic exercise training group. 2. Total work was high isokinetic than isotonic exercise group both in quadricaps and hamstring of knee joint, 10 weeks 12 weeks showed statistically significant in isokinetic exercise training group. 3. Average peak torque and total work was higher isokinetic than isotonic excercise group both in quadriceps and hamstring of knee joint, showed statistically significant in isokinetic exercise training group (p<0.05).(p<0.01). Isokinetic and isotonic exercise treatment were needed for sutable walk training in stroke. But I think that better method was isokinetic exercise treatment in muscular strength and endurance.

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Effect on Improvement of Muscle Strength for Loading Pattern using Electric Exercise Instrument (전동식 운동기기의 부하방식에 따른 근력증진 효과)

  • Kang, Seung-Rok;Kim, Kyung;Jeong, Gu-Young;Seo, Young-Bum;Jeong, Jang-Sik;Kim, Jung-Ja;Kwon, Tae-Kyu
    • Journal of the Korean Society for Precision Engineering
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    • v.29 no.2
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    • pp.229-238
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    • 2012
  • This study is to compare muscle strength between isotonic exercise and isotonic & isokinetic exercise. Participants are 12-man and 10-woman whom they are healthy without medical history in shoulder, elbow and lumbar joint. We performed experiment total 4-weeks that exercise 3-days a week each exercise pattern. We measured shoulder, elbow and lumbar joint torque with BIODEX and circumference of muscle in upper arms once a week. The result showed that isotonic & isokinetic exercise pattern significantly more improved joint torque in shoulder, elbow, lumbar than isotonic exercise pattern. Because that isotonic & isokinetic exercise pattern supplied muscle strengthen and caused muscle contraction. This exercise pattern can be used new exercise training method for major athlete and normal people. Also this pattern can be used rehabilitation treatment.

Review of characteristics of the isotonic combination: Importance of eccentric training (등장성 수축 결합기법의 특성에 대한 고찰 - 원심성 훈련의 중요성 -)

  • Kim, Mi-hyun;Bae, Sung-soo
    • PNF and Movement
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    • v.2 no.1
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    • pp.25-33
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    • 2004
  • Purpose : The purpose of this article is to summarize the characteristics of isotonic combination. Method : Some studies of the motor unit activation patterns during isometric, concentric, and eccentric actions, neural strategies in the control of muscle force, and concentric versus combined concentric-eccentric training were reviewed. Results & Conclusions : Eccentric torque may be relatively higher than concentric torque for two potential reasons: 1) stretch responses in the antagonist are not elicited to restrain the motion as can occur concentrically and 2) stretch responses in the agonist may augment eccentric torque production. Concentric-eccentric training has a greater influence on functional capacity than that of concentric training. Both maximal force and average force throughout the motion were significantly higher when the dynamic action was started with preactivation as compared to the mode without preactivation. The peak torques observed during the concentric phase of the eccentric-concentric muscle actions were higher than those noted in the pure concentric contraction.

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The Effect of Electrical Stimulation and Therapeutic Exercise on Muscular Strength in Knee Extensor Muscles (전기 자극과 치료적 운동에 의한 슬관절 신전근의 근력 증가 효과)

  • Park Rae-Joon;Kang Hwa-Soon
    • The Journal of Korean Physical Therapy
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    • v.10 no.2
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    • pp.33-40
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    • 1998
  • This study was carried out to investigate the muscle strength of quadriceps muscles by means of isokinetic test. The experimental objects were devided into electrically stimulated, isotonic and isometric groups and trained for 4weeks. The results were as follows : 1. the values of total work, peak torque, average power and the ratio of peak torque between flexors and extensors revealed singnificant statistically in three experimental groups(p<0.05). 2. The endurance was increased slightly in electrically stimulated group, but decreased in isotonic and isometric group, 3. The value of post training on all items did not reveal significant statistically in three experimental groups(P>0.05). 4. The electrically stimulated groups effected on increasing of muscle strength as isotonic and isometric exercises.

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Comparison between Isokinetic Peak Torque and Isotonic 1RM on the Knee Joint

  • Jaehyun Yoo
    • Physical Therapy Rehabilitation Science
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    • v.12 no.2
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    • pp.201-205
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    • 2023
  • Objective: Resistance exercise is a necessary element to improve quality of life, and measurement and evaluation of muscle strength provide important information for prescription and management of rehabilitation and exercise programs. This study analyzed the correlation between direct and indirect 1RM for isokinetic maximum torque of the knee joint in order to provide useful information in the field of exercise programs. In addition, the flexion-extension ratio and the difference in left-right deviation were verified. Design: A cross-sectional study Methods: The subjects of this study were 33 healthy adult men and women without medical problems who participated in the health exercise class program at S University in Seoul. The correlation between isokinetic maximum torque and direct and indirect 1RM was analyzed, and a dependent t-test was performed to analyze the flexion-extension ratio and left-right deviation. Results: There was a high correlation between the isokinetic maximum torque and direct and indirect 1RM, and no statistically significant difference was shown between the test methods in the analysis of the flexion-extension ratio and left-right deviation. Conclusions: Isokinetic muscle function measuring equipment is expensive, so it is difficult to use it in local exercise rehabilitation and training sites. Through this study, it was found that direct and indirect 1RM isokinetic maximum torque showed a high correlation, and there was no difference in evaluating muscle function such as flexion-extension ratio and left-right deviation. Therefore, it is considered that the muscle function evaluation using 1RM in general field can be usefully utilized.

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.

Joint Torque Estimation of Elbow joint using Neural Network Back Propagation Theory (역전파 신경망 이론을 이용한 팔꿈치 관절의 관절토크 추정에 관한 연구)

  • Jang, Hye-Youn;Kim, Wan-Soo;Han, Jung-Soo;Han, Chang-Soo
    • Journal of the Korean Society for Precision Engineering
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    • v.28 no.6
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    • pp.670-677
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    • 2011
  • This study is to estimate the joint torques without torque sensor using the EMG (Electromyogram) signal of agonist/antagonist muscle with Neural Network Back Propagation Algorithm during the elbow motion. Command Signal can be guessed by EMG signal. But it cannot calculate the joint torque. There are many kinds of field utilizing Back Propagation Learning Method. It is generally used as a virtual sensor estimated physical information in the system functioning through the sensor. In this study applied the algorithm to obtain the virtual senor values estimated joint torque. During various elbow movement (Biceps isometric contraction, Biceps/Triceps Concentric Contraction (isotonic), Biceps/Triceps Concentric Contraction/Eccentric Contraction (isokinetic)), exact joint torque was measured by KINCOM equipment. It is input to the (BP)algorithm with EMG signal simultaneously and have trained in a variety of situations. As a result, Only using the EMG sensor, this study distinguished a variety of elbow motion and verified a virtual torque value which is approximately(about 90%) the same as joint torque measured by KINCOM equipment.

Prediction Model of Endurance Time to Isotonic Contraction Exercise for Biceps Brachii using Multiple Regression Analysis with Personal Factors and Anthropometric Data (신체측정치수를 적용하여 다중회귀 분석을 통한 위팔두갈래근 등장성 운동의 근지구력시간 예측모델 연구)

  • Jeong, Ju-Young;Lee, Sang-Sik
    • The Journal of Korea Institute of Information, Electronics, and Communication Technology
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    • v.8 no.2
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    • pp.178-186
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    • 2015
  • Endurance time is very important indicator to estimate muscle fatigue. In the case of measuring endurance time directly, it is dangerous for subject to perform a test until the point of failure to main time force. Therefore, this paper presents the model to estimate endirance time using indirect measurements such as personal factors and anthropometrical data. Previous studies had shown that personal factors such as gender and age were not related to endurance time, but recently studies have shown that it is estimated by using independent variable or predictor such as GTA (Gravitational Torque of the horizontal, stretched arm) and MVC (Maximum Voluntary Contraction). The present study investigated variables to estimate endurance time using personal factors and anthrometrical data during isotonic contractions. Twenty five healthy subject volunteered for this study, and performed three test sessions of isotonic contraction exercises at 10~50% respectively. Afterward the correlation coefficient and p-values were compared among regression models using personal factors and anthropometrical data. The results demonstrated that multi-regression model had significant coefficient of correlation, and was useful estimate endurance time.

Torque Estimation of the Human Elbow Joint using the MVS (Muscle Volume Sensor) (근 부피 센서를 이용한 인체 팔꿈치 관절의 동작 토크 추정)

  • Lee, Hee Don;Lim, Dong Hwan;Kim, Wan Soo;Han, Jung Soo;Han, Chang Soo;An, Jae Yong
    • Journal of the Korean Society for Precision Engineering
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    • v.30 no.6
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    • pp.650-657
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    • 2013
  • This study uses a muscle activation sensor and elbow joint model to develop an estimation algorithm for human elbow joint torque for use in a human-robot interface. A modular-type MVS (Muscle Volume Sensor) and calibration algorithm are developed to measure the muscle activation signal, which is represented through the normalization of the calibrated signal of the MVS. A Hill-type model is applied to the muscle activation signal and the kinematic model of the muscle can be used to estimate the joint torques. Experiments were performed to evaluate the performance of the proposed algorithm by isotonic contraction motion using the KIN-COM$^{(R)}$ equipment at 5, 10, and 15Nm. The algorithm and its feasibility for use as a human-robot interface are verified by comparing the joint load condition and the torque estimated by the algorithm.