Eccentric Contractions
Mostrando 1-12 de 19 artigos, teses e dissertações.
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1. Time to task failure of the contralateral untrained limb after high load-low repetition eccentric and low load-high repetition resistance training
Abstract Aims: Cross-training is the process whereby training of one limb gives rise to enhancements in the performance of the opposite, untrained limb and may be dependent on type of muscle contractions performed. The aim of this study was to investigate whether unilateral resistance training using eccentric contraction is more effective than concentric res
Motriz: rev. educ. fis.. Publicado em: 15/05/2017
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2. A single bout of exercise with a flexible pole induces significant cardiac autonomic responses in healthy men
OBJECTIVES: Flexible poles can provide rapid eccentric and concentric muscle contractions. Muscle vibration is associated with a "tonic vibration reflex” that is stimulated by a sequence of rapid muscle stretching, activation of the muscle spindles and stimulation of a response that is similar to the myotatic reflex. Literature studies analyzing the acute
Clinics. Publicado em: 2014-09
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3. Effect of eccentric training on mitochondrial function and oxidative stress in the skeletal muscle of rats
The objective of the present study was to investigate the effects of eccentric training on the activity of mitochondrial respiratory chain enzymes, oxidative stress, muscle damage, and inflammation of skeletal muscle. Eighteen male mice (CF1) weighing 30-35 g were randomly divided into 3 groups (N = 6): untrained, trained eccentric running (16°; TER), and
Braz J Med Biol Res. Publicado em: 11/01/2013
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4. Low-frequency fatigue at maximal and submaximal muscle contractions
Skeletal muscle force production following repetitive contractions is preferentially reduced when muscle is evaluated with lowfrequency stimulation. This selective impairment in force generation is called low-frequency fatigue (LFF) and could be dependent on the contraction type. The purpose of this study was to compare LFF after concentric and eccentric max
Publicado em: 2011
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5. Estudo das alterações no volume muscular, na função articular e na marcha de hemiparéticos crônicos
This work consists of two studies. The aim of the first study was to investigate quadriceps and hamstring muscle volumes and strength deficits of the knee extensors and flexors in people with chronic hemiparesis compared to a healthy group. Fifteen individuals with chronic stroke and fifteen healthy individuals took part in this study. Motor function, quadri
Publicado em: 2010
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6. Low-frequency fatigue at maximal and submaximal muscle contractions
Skeletal muscle force production following repetitive contractions is preferentially reduced when muscle is evaluated with low-frequency stimulation. This selective impairment in force generation is called low-frequency fatigue (LFF) and could be dependent on the contraction type. The purpose of this study was to compare LFF after concentric and eccentric ma
Brazilian Journal of Medical and Biological Research. Publicado em: 2009-04
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7. Efeito agudo e crônico do exercício resistido de alta intensidade sobre o torque, atividade eletromiográfica do vasto lateral e freqüência cardíaca de homens idosos.
The objective of this study was to investigate the acute and chronic effects of high intensity resistance physical exercise on the magnitude of maximal average torque response normalized by body mass (MAT), RMS amplitude of eletromyographic signals (EMGs) of the vastus lateralis and heart rate variation (∆HR). Subjects were nine non-smoking men (ages 6
Publicado em: 2007
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8. Evaluation of the hip muscles mechanical behavior in transfemoral amputees / Avaliação do comportamento mecânico dos músculos do quadril em amputados transfemorais
Introduction Amputation at the transfemoral level leads to anatomical and functional adaptations that change the gate pattern and influences daily-life activities. It is well known that the side of the amputation presents lower force. However, it is not known if there is a specific angular position or angular velocity in that the force is even lower. Moreove
Publicado em: 2006
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9. v Effects of aging and osteoporosis on thoracic kyphosis, on proprioception and on trunk muscle torque. / Efeitos do envelhecimento e da osteoporose na cifose torácica, na propriocepção e no torque dos músculos do tronco.
The aim of this study was to evaluate the effects of aging and osteoporosis on thoracic kyphosis degree, on extensors and flexors trunk muscles torque and on proprioception. Moreover, this study investigated the possible correlation among the variables studied in this work. It was evaluated 40 voluntary women, divided in four distinct groups: Young Group (10
Publicado em: 2005
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10. Alterações funcionais e morfológicas do músculo quadríceps induzidas pelo treinamento excêntrico após reconstrução do LCA.
The anterior cruciate ligament (ACL) is the most commonly injured ligament in the knee and its rupture results in pain, instability, muscle atrophy and weakness. The quadriceps femoris muscle dysfunction is common before and after ACL reconstruction and can persist over years. A detailed understanding of neuromuscular function after ACL reconstruction is cri
Publicado em: 2004
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11. Functional changes of human quadriceps muscle injured by eccentric exercise
The present study evaluated functional changes of quadriceps muscle after injury induced by eccentric exercise. Maximal isometric torque of quadriceps and the surface electromyography (root mean square, RMS, and median frequency, MDF) of the vastus medialis oblique (VMO) and vastus lateralis (VL) muscles were examined before, immediately after and during the
Brazilian Journal of Medical and Biological Research. Publicado em: 2003-06
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12. Materials fatigue initiates eccentric contraction-induced injury in rat soleus muscle.
1. The initiation of exercise-induced muscle injury is thought to be the result of high tensile stresses produced in the muscle during eccentric contractions. Materials science theory suggests that high tensile stresses could initiate the injury during the first eccentric contraction (normal stress theory) or after multiple eccentric contractions (materials