The Effects of Elbow Joint Angle Change on the Elbow Flexor Muscle Activation          in Pulley with Weight Exercise

Kang, Taewook; Seo, Young‐Joon; Park, Jaehoon; Dong, Eunseok; Seo, Byungdo; Han, Dong‐Wook

doi:10.1589/jpts.25.1133

Cited by 9 publications

(6 citation statements)

References 15 publications

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“…After 2 min of rest, the subjects randomly performed 5 concentric PT and 5 isometric PT trials [ 56 ]. The concentric muscle actions were performed at 60°·s −1 through a 90° range of motion (from 170° to 80°), and the isometric muscle actions were performed for 4 s at an elbow joint angle of 115° where 180° corresponded to full extension [ 57 , 58 , 59 , 60 ]. The highest values were selected as the pretest concentric PT and isometric PT, respectively.…”

Section: Methodsmentioning

confidence: 99%

Muscle- and Mode-Specific Responses of the Forearm Flexors to Fatiguing, Concentric Muscle Actions

Hill

Housh

Smith

et al. 2016

Sports

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Background: Electromyographic (EMG) and mechanomyographic (MMG) studies of fatigue have generally utilized maximal isometric or dynamic muscle actions, but sport- and work-related activities involve predominately submaximal movements. Therefore, the purpose of the present investigation was to examine the torque, EMG, and MMG responses as a result of submaximal, concentric, isokinetic, forearm flexion muscle actions. Methods: Twelve men performed concentric peak torque (PT) and isometric PT trials before (pretest) and after (posttest) performing 50 submaximal (65% of concentric PT), concentric, isokinetic (60°·s−1), forearm flexion muscle actions. Surface EMG and MMG signals were simultaneously recorded from the biceps brachii and brachioradialis muscles. Results: The results of the present study indicated similar decreases during both the concentric PT and isometric PT measurements for torque, EMG mean power frequency (MPF), and MMG MPF following the fatiguing workbout, but no changes in EMG amplitude (AMP) or MMG AMP. Conclusions: These findings suggest that decreases in torque as a result of fatiguing, dynamic muscle actions may have been due to the effects of metabolic byproducts on excitation–contraction coupling as indicated by the decreases in EMG MPF and MMG MPF, but lack of changes in EMG AMP and MMG AMP from both the biceps brachii and brachioradialis muscles.

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Section: Methodsmentioning

confidence: 99%

Muscle- and Mode-Specific Responses of the Forearm Flexors to Fatiguing, Concentric Muscle Actions

Hill

Housh

Smith

et al. 2016

Sports

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“…To determine whether or not SMWAMs improve muscle strength, Wilcoxon’s Signed Rank test was performed, because the Shapiro-Wilk’s test showed the data were not normally distributed 13 ) . The analysis was performed with the statistical analysis program SPSS WIN (ver.21) and a significance level of α=0.05.…”

Section: Methodsmentioning

confidence: 99%

The effects of spinal mobilization with arm movements on shoulder muscle strengthening

2015

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[Purpose] This study was performed to examine the immediate effects of spinal mobilization with arm movements (SMWAMs) for strengthening the shoulder muscles. [Subjects] The subjects of this study were 12 healthy male students who were studying at S University, Busan City. They had no musculoskeletal disease, or upper congenital malformation, and had no history of surgery or neurological disease. [Methods] The SMWAMs were performed on the 4th cervical vertebra (C4). For stimulation of the 5th cervical nerve, the spinous process of the C4 was pushed to the left and held in place. Then the arm was abducted to the point where spinous process was felt, and the range of abduction was examined. Subsequently, the abduction movement was repeated 10 times to the same point, and the gliding of C4 was held until the arm returned to the starting position. During the treatment, the head and the trunk were held in the correct posture. [Results] After SMWAMs had been performed, the muscular strength of shoulder flexion, extension and adduction significantly increased. [Conclusion] In our opinion, the SMWAMs are a very useful method for correcting spinal malalignment, and for stimulating the joint mechanoreceptors without the risks of manipulation. SMWAM is a valuable therapy method that can complement the demerits of mobilization.

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“…cle actions were performed through a 90 ° range of motion (0-90 ° of elbow flexion, where 0 ° corresponds to full extension at the elbow). The isometric muscle actions were performed at a joint angle of 45 ° and each MVIC trial was sustained for 3-s [26]. Peak torque and MVIC trials were also performed immediately (posttest) and 5-min after (recovery) completing the fatiguing protocol.…”

Section: Determination Of Eccentric Pt Concentric Pt and Mvicmentioning

confidence: 99%

Sex- and Mode-specific Responses to Eccentric Muscle Fatigue

et al. 2018

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The primary purpose of the present investigation was to examine sex-related differences as a result of fatiguing eccentric muscle actions on torque, muscle blood flow, electromyography, and mechanomyography. Eighteen men and 18 women performed peak torque trials prior to (pretest), immediately after (posttest), and 5-min after (recovery) completing 50 submaximal (60% of eccentric peak torque), eccentric, isokinetic (180°·s ) muscle actions of the elbow flexors. Electromyographic and mechanomyographic responses were simultaneously recorded from the biceps brachii muscle, and muscle blood flow was measured at pretest, posttest and recovery. There were sex- and mode-specific responses for torque, but there were no sex-specific muscle blood flow or neuromuscular responses. From pretest to posttest, torque decreased (80.0-88.2% of pretest) for both the men and women. At recovery concentric peak torque recovered to a greater extent in women (95.0% of pretest) than men (88.0% of pretest), while eccentric peak torque recovered to a greater extent in men (88.9% of pretest) than women (86.9% of pretest). The sex-specific torque responses were not associated with different motor control strategies or differences in the occlusion of muscle blood flow between the men and women. For both men and women, eccentric fatiguing exercise is manifested similarly during isometric muscle actions, but not during eccentric and concentric muscle actions.

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The Effects of Elbow Joint Angle Change on the Elbow Flexor Muscle Activation in Pulley with Weight Exercise

Cited by 9 publications

References 15 publications

Muscle- and Mode-Specific Responses of the Forearm Flexors to Fatiguing, Concentric Muscle Actions

Muscle- and Mode-Specific Responses of the Forearm Flexors to Fatiguing, Concentric Muscle Actions

The effects of spinal mobilization with arm movements on shoulder muscle strengthening

Sex- and Mode-specific Responses to Eccentric Muscle Fatigue

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