• Title, Summary, Keyword: Endurance

Search Result 1,421, Processing Time 0.051 seconds

The Effect of Long-term Endurance training and Antioxidant Combined Vitamin Supplementation on blood Antioxidant Enzymes Activity, Lipid Peroxidation and Lipoprotein metabolism (장기간의 지구성 훈련시 항산화 Vitamin 복합 투여가 혈중 항산화 효소 활성도, 지질 과산화 및 지단백 대사에 미치는 영향)

  • Kim Yoo-Sub
    • The Journal of Korean Physical Therapy
    • /
    • v.14 no.4
    • /
    • pp.100-118
    • /
    • 2002
  • This study was to investigate the effect of long-term high intensity endurance training on the activation of antioxidation enzyme activity, lipid peroxidation and lipoprotein metabolism. 15 subjects were divided into, endurance exercise + antioxidation Vitamin supplement(n=5), endurance exercise(n=5), and the control(n=5) groups. The endurance exercise groups(endurance exercise + antioxidation Vitamin supplement and endurance exercise) had 12 week of endurance exercise program. The antioxidation Vitamin supplement group was taken a Vitamin C tablet with 1000mg/day and Vitamin E tablet with 671.14mg/day right after lunch. The results obtained from this study were as follows; 1. Looking at the changes of SOD, Endurance exercise+antioxidation Vitamin supplement group and endurance exercise groups showed the significantly greater decrease in the activation of SOD after 12 weeks of all-out exercise. 2. Looking at the changes of CAT, Endurance exercise+antioxidation Vitamin supplement group revealed subjects tended to increase CAT after all-out exercise although statistically non-significant. Endurance exercise+antioxidation Vitamin supplement group showed the significantly greater increase in the activation of CAT after 12 weeks treatment for all-out exercise. 3. Looking at the changes of GPX, Endurance exercise+antioxidation Vitamin supplement group revealed subjects tended to increase GPX for the rest and after all-out exercise although statistically non-significant. Endurance exercise+antioxidation Vitamin supplement group showed the significantly greater increase in the activation of GPX after 12 weeks treatment for all-out exercise. 4. The MDA change showed the significant decrease after 6 weeks, after 12 weeks for the all-out exercise of Endurance exercise + antioxidation Vitamin supplement group. 5. There was non-significant change in lipoprotein metabolism for the rest and after all-out exercise.

  • PDF

The Effects of Cervical ROM and Muscle Endurance on Cervical Joint Mobilization of Normal Adults (경추관절가동술이 정상성인의 경부 관절가동범위와 정적근지구력에 미치는 영향)

  • Gong, Won-Tae;Lee, Sang-Yeol;Lee, Yoon-Mi
    • Journal of the Korean Society of Physical Medicine
    • /
    • v.5 no.1
    • /
    • pp.7-13
    • /
    • 2010
  • The purpose of this study was to evaluate the influence of cervical ROM and muscle endurance on cervical joint mobilization of normal adults. Both joint mobilization group(n=20) and control group(n=20) were measured an cervical ROM and muscle endurance time by CROM and stop watch at pre-test, post-test in 1 weeks, post-test in 2 weeks and post-test in 3 weeks. The flexion ROM, extension ROM and muscle endurance of the joint mobilization group were significantly different among the experimental period (p<.05). The Correlation of muscle endurance and extension ROM is significantly Correlation (p<.05). In conclusion, we were found that cervical joint mobilization could increase cervical ROM and muscle endurance and Correlation of muscle endurance and extension ROM.

The Effect of Elasticity of Taping on Ankle Muscles'Activity and Endurance after Plyometric Training

  • An, Ho Jung;Lee, Ho Kyun;Lee, Jae Kap;Yoo, Kyung Tae;Kim, Sung Won;Kim, Nyeon Jun;Koo, Ja Pung;Choi, Wan Suk;Choi, Jung Hyun
    • Journal of International Academy of Physical Therapy Research
    • /
    • v.5 no.2
    • /
    • pp.757-763
    • /
    • 2014
  • The purpose of this study is to observe the effect of elasticity of taping on ankle muscles'activity and endurance after plyometric training that easily causes ankle injury, and provide baseline data for physical therapy intervention methods. The study subjects are 24 male students in their 20s who attend N University in Choongnam. They were divided into three groups; 8 subjects in the elastic taping group, 8 in the non-elastic taping group, and 8 in the non-taping group(control group). They had plyometric training for 6 weeks. After the training, this study measured their maximum voluntary isometric contraction(MVIC) and muscle endurance of the muscles around ankle joint. The experiment result is as follows. After the training, all three groups showed improvement in muscle strength and endurance. The elastic taping group showed insignificant improvement in muscle strength but significant increase in muscle endurance in plantarflexion. In dorsiflexion, both muscle strength and endurance increased significantly. The non-elastic taping group showed insignificant improvement in muscle strength but significant increase in muscle endurance in plantarflexion. Taping during plyometric training had a little or insignificant effect on muscle endurance and strength compared to the non-taping group.

A Study on Proper Procedure for Helicopter Transmission Endurance Test (적절한 헬기 트랜스미션 내구도 시험절차 연구)

  • Lee, Sangmok;Hwang, Jungsun
    • Journal of the Korea Institute of Military Science and Technology
    • /
    • v.16 no.6
    • /
    • pp.771-778
    • /
    • 2013
  • Transmission is a core component of helicopter to transmit power from engine to rotor and must have a endurance to be able to show satisfactorily its performance required during its life time. When developing a new helicopter, both military and civil airworthiness authorities require a tie-down test to verify its endurance. Procedure for transmission endurance test is described in FAR part 29 or US military specification but its details are more or less ambiguous. In this paper, we have proposed a proper procedure for transmission endurance test by giving KUH transmission endurance test example including determination of applicable torque, load and test profile.

The Effect of Cigarette Smoking on Physical Fitness and Depression of Patients with Chronic Low Back Pain

  • Lee, Juhwan;Park, Sieun
    • The Journal of Korean Physical Therapy
    • /
    • v.27 no.4
    • /
    • pp.275-280
    • /
    • 2015
  • Purpose: This study was conducted to investigate the effect of cigarette smoking on physical fitness (dominant hand grip power, dominant isokinetic leg muscle strength, abdominal muscle endurance, flexibility, cardiopulmonary endurance) and depression in patients with chronic low back pain. Methods: This study was a cross sectional study and subjects consisted of 60 young males with chronic low back pain. The subjects were allocated to two groups following a self-report survey: cigarette smoking group (n=25) or non-smoking group (n=35). Physical fitness (dominant hand grip power, dominant isokinetic leg muscle strength, abdominal muscle endurance, flexibility, cardiopulmonary endurance) were measured using objective methods and depression in patients with chronic low back pain was measured using the Korean version of center for epidemiologic studies depression (CES-D) scale. Results: The results of this study were as follows: In physical fitness, the cigarette smoking group showed a significant decrease in abdominal muscle endurance, flexibility, and cardiopulmonary endurance compared with the non-smoking group. Depression index (CES-D scale score) was significantly higher in the cigarette smoking group than in the non-smoking group. Conclusion: These results suggest that cigarette smoking had a negative effect on abdominal muscle endurance, flexibility, and cardiopulmonary endurance in patients with chronic low back pain. In addition, depression of patients with chronic low back pain was affected by cigarette smoking. Thus, we suggested that cigarette smoking may play a significant role in the deterioration of physical fitness and depression of chronic low back pain patients.

The Study of Isometric Endurance Time by Task Type and Maximum Voluntary Contraction (작업형태 및 최대 수의적 수축에 따른 등척성 근지구력에 관한 연구)

  • Sim, Jeong-Hun;Lee, Sang-Do
    • Journal of the Ergonomics Society of Korea
    • /
    • v.22 no.2
    • /
    • pp.57-69
    • /
    • 2003
  • This study was performed to investigate the isometric endurance time as percentages of maximum voluntary contraction. Electromyogram(EMG) and Borg's CR-I0 value were measured by push-pull-up-down tasks for 10 healthy males. The normalized EMG value and the MPF(mean power frequency) were used to estimate the muscle recruitment pattern and the development of muscle fatigue. The subjects exerted and maintained 5 levels of %MVC(maximum voluntary contraction) in $90^{\circ}$ shoulder flexion/ 180oelbow extension at sitting posture. The up-task showed the lower endurance time and higher Borg's CR-I0 value than the other task types. Comparing Rohmert's curve with the endurance time of task types. Rohmert's curve overestimated the endurance time of up-task and underestimated the endurance time of push-pull-down tasks. The normalized EMG value showed that muscles recruitment patterns were different from task types. The 4 muscles(biceps brachii muscle, tricep brachii muscle. middle deltoid muscle. trapezius muscle) recruitment patterns of up-task were higher than those of other tasks. The MPF value decreased with the endurance time, and the shift of MPF at up-task was larger than that of the other task types.

Effects of Transcranial Direct Current Stimulation with Aerobic Exercise on Lower Extremity Muscle Endurance for Elderly Women (경피 두개 직류 전류자극과 병행한 유산소운동이 노인 여성의 근지구력에 미치는 영향)

  • Cho, Namjeong;Kim, Suhyon
    • Journal of The Korean Society of Integrative Medicine
    • /
    • v.6 no.2
    • /
    • pp.117-123
    • /
    • 2018
  • Purpose : The purpose of this study was to investigate the effect of increased brain activity on the muscle endurance and the effect of brain activation through the combination of transcranial direct current stimulation and aerobic exercise on elderly woman. Methods : To investigate the effect of the muscle endurance on right leg, muscle endurance was evaluated by measuring the surface EMG of the muscles of the rectus femoris, biceps femoris, tibialis anterior, and gastrocnemius muscle. Results : There was a significant difference in the pre and post comparisons of muscle endurance on rectus femoris, biceps femoris, tibialis anterior muscle (p<.05). Difference of Combination of transcranial direct current stimulation and aerobic exercise group median frequency was smaller than control group (p<.05). There was not a significant difference in the pre and post comparisons of muscle endurance on biceps femoris, and gastrocnemius muscle. Difference of Combination of transcranial direct current stimulation and aerobic exercise group median frequency was showed a similar pattern. Conclusion : Through these results, It was found that increasing the brain activity by the transcranial direct current stimulation improves the exercise capacity on the elderly women. Combination of transcranial direct current stimulation and aerobic exercise maybe applied as an effective treatment for improving muscular endurance.

A Study on the Reliability Evaluation System for O-ring of Semiconductor Equipments (반도체장비용 오링의 종합 신뢰성 평가기술에 관한 연구)

  • 김동수;김광영;최병오;박화영
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • /
    • pp.613-617
    • /
    • 2001
  • The test items like as endurance, air leakage and oil endurance test is requested for reliability evaluation about O-ring which is a kind of core machinery accessories of semi-conduct manufacturing equipment. For verification of these, we design and manufactured a test system for endurance, air leakage and oil endurance of O-ring for semi-conduct manufacturing equipment, and also performed the test for two kinds of O-ring, as it were Viton and Kalretz. The characteristics of this test equipment consist in realization of the test conditions of semi-conduct manufacturing equipment and satisfying the test method. The test conditions are cut gas, vacuum grade, temperature and revolution numbers in the endurance test system, vacuum grade and temperature in the air leakage test system, temperature and time in the oil endurance test system. The separating test results for wearing which is an oil endurance test item, the wearing index of domestic produced Viton O-ring is higher than foreign product by 2%, wearing rate of Kalretz O-ring better than Viton O-ring by 17%, and particles existed in various place. The test result of air leakage which is measured through the RGA sensor used Helium, the vacuum grade was $10^-3$Torr. And the test result of oil endurance, the volume change rate was 7~15%. Hereafter, we intend to analysis the reliability test evaluation and to utilize for domestic manufacturing companies by establishing data base and developing reliability softwares.

  • PDF

Estimation of the Vibration Endurance Characteristics of Air Cleaner Insulators for Vehicle (차량용 에어클리너 인슐레이터의 진동 내구성 평가)

  • 김정헌;김석현
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
    • /
    • /
    • pp.931-936
    • /
    • 2004
  • In this paper, vibration endurance test is carried out on rubber insulators used fur vehicle air cleaners. Based on the test results, endurance characteristics depending on type and material of the insulators are estimated. Frequency response characteristics of the air cleaner system are investigated to identify the cause of wear and failure in the insulators occurred during the endurance test. New insulator models with improved endurance characteristics are proposed by changing the frequency response property of the air cleaner system.

  • PDF

Increasing Flight Endurance of MAVs using Multiple Quantum Well Solar Cells

  • Hassanalian, Mostafa;Radmanesh, Mohammadreza;Sedaghat, Ahmad
    • International Journal of Aeronautical and Space Sciences
    • /
    • v.15 no.2
    • /
    • pp.212-217
    • /
    • 2014
  • Micro Aerial Vehicles (MAVs) are useful devices to assess new features that may be utilized in a full size aircraft to enhance performance or to increase endurance. In this article, sources for energy saving in the micro air vehicles are initially addressed. Then, by specifying the important parameters on energy consumption of an aircraft, a feasibility study is conducted to assess the benefit of using solar cells to increase flight endurance. Next, a new solar cell has been designed and optimized for MAVs. This cell consists of a multiple quantum wells for which the quantum factor and the absorption coefficient are calculated by solving the Shrodinger equation using MATLAB software. Then, the manner and influence of MAVs parameters using the solar cells are examined to suggest optimal planform for different purposes. In order to increase flight endurance, it is noted that by using appropriate planform and the optimized solar cells, flight endurance can be increased by more than 30 percent.