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Jun-Seok Kim, Moon-Hwan Kim, Duk-Hyun Ahn, and Jae-Seop Oh

strength that have focused on isolated activation of SA compared with pectoralis major (PM) or other periscapular muscles mostly include a protraction component. 2 , 18 , 19 Electromyography (EMG) tests of SA function during manual muscle testing (MMT) is designed to replicate the primary motion of a

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Paulo H. Marchetti and Marco C. Uchida

The aim of the current study was to investigate the EMG activity of pectoralis major and latissimus dorsi muscles during the pullover exercise. Eight healthy male volunteers took part in the study. The EMG activity of the pectoralis major and that of the latissimus dorsi of the right side were acquired simultaneously during the pullover exercise with a free-weight barbell during both the concentric and eccentric phases of the movement. After a warm-up, all the subjects were asked to perform the pullover exercise against an external load of 30% of their body weight, during 1 set × 10 repetitions. The criterion adopted to normalize the EMG data was the maximal voluntary isometric activation. The present findings demonstrated that the barbell pullover exercise emphasized the muscle action of the pectoralis major more than that of the latissimus dorsi, and the higher activation depended on the external force lever arm produced.

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Jinger S. Gottschall, Bryce Hastings, and Zachary Becker

well as popular, method to modify upper-body activity depending upon the target muscles. Cogley et al 1 measured the pectoralis major and triceps brachii muscle activation during a push-up with a wide, middle, and narrow hand position. The study revealed that activation of both of these muscles was

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Marcelo Danillo Matos dos Santos, Felipe J. Aidar, Raphael Fabrício de Souza, Jymmys Lopes dos Santos, Andressa da Silva de Mello, Henrique P. Neiva, Daniel A. Marinho, and Mário C. Marques

clavicular head of pectoralis major decreased their activity with wider grips, while the sternocostal head of the pectoralis major’s muscle activity did not change. Moreover, increasing the grip width to 200% BAD resulted in greater pectoralis major activity, 9 – 11 but lower anterior deltoid 11 and

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James W. Youdas, Hannah E. Baartman, Brian J. Gahlon, Tyler J. Kohnen, Robert J. Sparling, and John H. Hollman

recruitment from muscles of the upper-extremities and torso to check unwanted horizontal and diagonal plane movements of the hands. 2 , 4 , 6 – 8 In addition, performing suspended push-ups may increase trunk muscle recruitment to provide greater thoracic stabilization. 9 For example, the pectoralis major

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Sebastian Klich, Bogdan Pietraszewski, Matteo Zago, Manuela Galli, Nicola Lovecchio, and Adam Kawczyński

, Estonia) was used to measure stiffness and creep of upper trapezius, infraspinatus, anterior and posterior deltoid, and pectoralis major. In particular, muscle stiffness is defined as the property that characterizes resistance to the contraction or to a stretching external force that deforms the initial

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Luis Rodiles-Guerrero, Pedro Jesús Cornejo-Daza, Juan Sánchez-Valdepeñas, Julian Alcazar, Carlos Rodriguez-López, Miguel Sánchez-Moreno, Luis María Alegre, Juan A. León-Prados, and Fernando Pareja-Blanco

pectoralis major muscle excitation and only the VL0 intervention obtained significant enhancements in the early rate of force development (RFD). 6 No differences between protocols were observed for strength gains despite the considerable differences in the total volume accumulated by each group. 6 Both

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Gakuto Kitamura, Hiroshige Tateuchi, and Noriaki Ichihashi

their LBP, their swimming style, and the number of their training years were determined. The intensity of their LBP was assessed as being between 0 and 100 based on the VAS. The elastic moduli of the psoas major, iliacus, teres major, latissimus dorsi, pectoralis major, and pectoralis minor muscles were

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Angelica E. Lang, Soo Y. Kim, Stephan Milosavljevic, and Clark R. Dickerson

the capability of muscle, 11 altering lines of action, or even removing muscles from the model entirely. 12 With regard to breast cancer, the pectoralis major muscle in survivors has reduced capability following surgery. 13 – 15 As such, biomechanical models developed on a healthy population can

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Esther Casas, Arturo Justes, and Carlos Calvo

trapezius (UT)/lower trapezius (LT), serratus anterior (SA)/pectoralis major (PM), and external abdominal oblique (EAO)/lumbar paraspinal (LP) muscles were collected with 6 wireless probes, 16-bit resolution, BTS FREEEMG 1000 located at the belly of the muscles using standard electrodes with snap connectors