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Surface Electromyography of the Internal and External Oblique Muscles During Isometric Tasks Targeting the Lateral Trunk

Allison L. Kinney, Matthew Giel, Brady Harre, Kyle Heffner, Timothy McCullough, Maria Savino, Alexi Scott, and Joaquin A. Barrios

test for the trunk extensors. 11 , 12 The proposed task is to maintain the upper body in a side-lying but unsupported horizontal position while stabilizing the pelvis and lower limbs via strapping to a plinth. In this study, we compare the electromyography (EMG) results for this trunk-elevated side

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A Comparison of Gluteus Maximus, Biceps Femoris, and Vastus Lateralis Electromyography Amplitude for the Barbell, Band, and American Hip Thrust Variations

Bret Contreras, Andrew D. Vigotsky, Brad J. Schoenfeld, Chris Beardsley, and John Cronin

Bridging exercise variations are well researched and commonly employed for both rehabilitation and sport performance. However, resisted bridge exercise variations have not yet been compared in a controlled experimental study. Therefore, the purpose of this study was to compare the differences in upper and lower gluteus maximus, biceps femoris, and vastus lateralis electromyography (EMG) amplitude for the barbell, band, and American hip thrust variations. Thirteen healthy female subjects (age = 28.9 y; height = 164.3 cm; body mass = 58.2 kg) familiar with the hip thrust performed 10 repetitions of their 10-repetition maximum of each variation in a counterbalanced and randomized order. The barbell hip thrust variation elicited statistically greater mean gluteus maximus EMG amplitude than the American and band hip thrusts, and statistically greater peak gluteus maximus EMG amplitude than the band hip thrust (P ≤ .05), but no other statistical differences were observed. It is recommended that resisted bridging exercise be prescribed according to the individual’s preferences and desired outcomes.

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A Comparison of Gluteus Maximus, Biceps Femoris, and Vastus Lateralis Electromyography Amplitude in the Parallel, Full, and Front Squat Variations in Resistance-Trained Females

Bret Contreras, Andrew D. Vigotsky, Brad J. Schoenfeld, Chris Beardsley, and John Cronin

Front, full, and parallel squats are some of the most popular squat variations. The purpose of this investigation was to compare mean and peak electromyography (EMG) amplitude of the upper gluteus maximus, lower gluteus maximus, biceps femoris, and vastus lateralis of front, full, and parallel squats. Thirteen healthy women (age = 28.9 ± 5.1 y; height = 164 ± 6.3 cm; body mass = 58.2 ± 6.4 kg) performed 10 repetitions of their estimated 10-repetition maximum of each respective variation. There were no statistical (P = .05) differences between full, front, and parallel squats in any of the tested muscles. Given these findings, it can be concluded that the front, full, or parallel squat can be performed for similar EMG amplitudes. However, given the results of previous research, it is recommended that individuals use a full range of motion when squatting, assuming full range can be safely achieved, to promote more favorable training adaptations. Furthermore, despite requiring lighter loads, the front squat may provide a similar training stimulus to the back squat.

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The Effect of Aquabag Use on Muscle Activation in Functional Strength Training

Evi Wezenbeek, Luna Verhaeghe, Katrien Laveyne, Lieze Ravelingien, Erik Witvrouw, and Joke Schuermans

-related effects between subjects possible. After completing the MVC’s, participants performed 3 repetitions of each exercise using a noninertial wooden stick and a destabilizing AB, while electromyography (EMG) data were acquired with focus on the dominant side. During the exercises, timing (ie, duration of the

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Effects of Low-Frequency Whole-Body Vibration on Muscle Activation, Fatigue, and Oxygen Consumption in Healthy Young Adults: A Single-Group Repeated-Measures Controlled Trial

Ju-Yul Yoon, Seung-Rok Kang, Hye-Seong Kim, Yu Hui Won, Sung-Hee Park, Jeong-Hwan Seo, Myoung-Hwan Ko, and Gi-Wook Kim

 Hz while performing squat exercises with low-frequency WBV. Therefore, the independent variable was defined as the vibration frequency, and the dependent variables were muscle activity, measured with electromyography (EMG), and VO 2 , measured with a gas analyzer during exercise. In addition, to

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Reliability of Upper-Extremity Muscle Activity and Kinematics During Adaptive Rowing

Elizabeth Euiler and Margaret Finley

for participation if they were >18 year of age, used a MWC for at least 50% of community mobility, 15 and able to read and understand English. The Drexel University Institutional Review Board approved the protocol. Outcome Measures Electromyography Muscle activation was analyzed using surface

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Experimentally Induced Pain Results in Reduced Activity of the Rotator Cuff Muscles in Healthy Subjects

Jennifer L. Cooper and Andrew R. Karduna

. doi: 10.1007/s00221-007-1199-2 25. Samani A , Holtermann A , Søgaard K , Madeleine P . Experimental pain leads to reorganisation of trapezius electromyography during computer work with active and passive pauses . Eur J Appl Physiol . 2009 ; 106 ( 6 ): 857 – 866 . doi: 10.1007/s00421

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Crossover Effects of Unilateral Static Stretching and Foam Rolling on Contralateral Hamstring Flexibility and Strength

Benjamin S. Killen, Krista L. Zelizney, and Xin Ye

, biceps femoris; CI, confidence interval; EMG, electromyography; Post, after intervention; Pre, before intervention; ROM, range of motion; SAFR, self-administered foam rolling intervention; SEMI, semitendinosus; SS, static stretching intervention. *Statistically significant difference ( P  ≤ .05

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Effects of Visual Biofeedback on Symmetrical Movements During Bridge Exercise With Sling

Soo-Yong Kim, Jae-Seop Oh, and Min-Hyeok Kang

rotation during the bridge exercise. We hypothesized that pressing pressure on the sling system and bilateral electromyography (EMG) activity of the hip- and back-extensor muscles would be more symmetrical while the amount of pelvic rotation would decrease during the bridge exercise with visual biofeedback

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Addition of a Cognitive Task During Walking Alters Lower Body Muscle Activity

Jordyn Vienneau, Sandro Nigg, and Benno M. Nigg

; Wrightson et al., 2016 ), aging adults ( Hausdorff et al., 2008 ; Springer et al., 2006 ), and diseased populations such as individuals with Parkinson’s disease ( Yogev et al., 2005 ) or multiple sclerosis ( Hamilton et al., 2009 ). The study of muscle activation using electromyography (EMG) provides