Shoulder muscle EMG activity during push up variations on and off a Swiss ball

Lehman, Gregory J; MacMillan, Brandon; Macintyre, Ian G.; Chivers, Michael; Fluter, Mark

doi:10.1186/1476-5918-5-7

Cited by 122 publications

(92 citation statements)

References 14 publications

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“…Arm abducted as resistance applied at elbow 15,22 Extension with internal rotation Shoulder abducted 308 with elbow extended. Arm extended and internally rotated as resistance applied at wrist 17,20,21,23 Abduction 908 with neck side bend Shoulder abducted 908 with neck first side-bent to same side, rotated to opposite side, and then extended as resistance applied at head and above elbow with subject sitting in an erect posture with no back support 3 Flexion 1258…”

Section: Resultsmentioning

confidence: 99%

Standard maximum isometric voluntary contraction tests for normalizing shoulder muscle EMG

Boettcher

Ginn

Cathers

2008

Journal Orthopaedic Research

225

146

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A comparison of electromyographic (EMG) activity of muscles between and within subjects, and during separate occasions of testing, requires normalization. The most common way for generating the reference level used for normalizing shoulder EMG data is with a maximum isometric voluntary contraction (MVIC). The purpose of this study was to develop a parsimonious set of standardized tests that generate an MVIC in all the major muscle groups of the shoulder. Twelve muscles of the dominant shoulder of 15 subjects were examined using a combination of surface and intramuscular electrodes during 15 tests. The results indicated that many tests maximally activated more than one muscle simultaneously. Four tests were identified as being sufficient for generating an MVIC in the 12 muscles examined and are recommended as the standard set for normalizing shoulder muscle EMG: abduction 908 with internal rotation (''empty can''), internal rotation in 908 abduction (''internal rotation 908''), flexion at 1258 with scapula resistance (''flexion 1258''), and horizontal adduction at 908 flexion (''palm press''). The use of these shoulder normalization tests will make comparisons between shoulder EMG studies more reliable. ß

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Section: Resultsmentioning

confidence: 99%

Standard maximum isometric voluntary contraction tests for normalizing shoulder muscle EMG

Boettcher

Ginn

Cathers

2008

Journal Orthopaedic Research

225

146

View full text Add to dashboard Cite

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“…12,30,36,39,56,61 Therefore, rehabilitation exercises that target activation of the scapular muscles have been evaluated using electromyography (EMG) in a number of studies. 8,10,11,13,20,22,30,34,35,38,41,47,50 While these previous studies provided useful information regarding the muscles being activated during various exercises, they did not document the associated scapular kinematics. Measurement of the scapular and clavicular movement, along with muscle activity during exercises, will provide additional information clinicians can use to select exercises based on their patient's needs.…”

Section: Instrumentationmentioning

confidence: 95%

Three-Dimensional Scapular and Clavicular Kinematics and Scapular Muscle Activity During Retraction Exercises

Oyama

Myers²,

Wassinger

et al. 2010

Journal of Orthopaedic & Sports Physical Therapy

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Sakiko oyama, MS, ATC1 • Joseph B. Myers, PhD, ATC2 Craig a. Wassinger, PT, PhD3 • sCott M. Lephart, PhD, ATC 4 p roper movement of the scapula and clavicle is essential in minimizing stress applied to tissues surrounding the glenohumeral joint during overhead movements. 15,29,32,36,39,40,56,61 Scapular/clavicular movement maintains line of pull and length-tension relationship of the rotator cuff muscles throughout humeral range of motion. 31,33,39,64 This enables the rotator cuff muscles to produce joint compression while minimizing translation of the Three-Dimensional Scapular and Clavicular Kinematics and Scapular Muscle Activity During Retraction Exercises t stUDy Design: Controlled laboratory study.t oBJeCtiVes: To describe and compare scapular and clavicular kinematics and muscle activity during 6 retraction exercises in young healthy adults (mean  SD age, 23.2  2.4 years).

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“…The infraspinatus electrode was placed medial to the posterior deltoid approximately 1 cm below the spine of the scapular. The latissimus dorsi electrode was placed 3 fingerbreadths distal to and along the posterior axillary fold, parallel to the lateral border of the scapular 1,9,11) . Surface electrodes were attached along the direction of the muscle fibers of each muscle group, and ground electrodes were placed around the C6 spinous process.…”

Section: Methodsmentioning

confidence: 99%

“…Recent rehabilitation programs recommend the use of the push-up plus on an unstable surface in order to increase the activities of the muscles around the scapula, proprioception, and balance of shoulder movement. Also, various researches are being performed to investigate the differences in muscle activities evoked by different supporting surfaces [8][9][10][11] .…”

Section: Introductionmentioning

confidence: 99%

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Periscapular Muscle Activities and Kinematic Analysis of the Performed on Different Supporting Surfaces for the Lower Limbs Push-up Plus Exercise

Yoon

Lee

2013

J Phys Ther Sci

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Abstract. [Purpose] This study examined periscapular muscle activities and performed a kinematic analysis of the push-up plus exercises with the lower limbs supported on a stable surface (bench) and an unstable surface (elastic ball). [Subjects and Method] The subjects were 15 college students. Surface electromyograms were recorded of the upper trapezius, serratus anterior, latissimus dorsi, and infraspinatus while the subjects performed the push-up plus exercises with their feet placed on a bench or an elastic gym ball. Markers for kinematic changes of elbow flexion, shoulder extension, shoulder retraction and scapular adduction were attatched the C7 and T7 spinous processes, both acromions, scapula superior and inferior angles, humeral lateral epicondyles, and ulnar styloid processes. The subjects completed three sets of push-up plus exercise. Three dimensional angles were calculated for the elbow, glenohumeral and scapulothoracic joint motions. The collected data were analyzed using the paired t-test and SPSS 18.0.[Result] There were statistically significant increase in the serratus anterior, infraspinatus, latissimus dorsi muscle activities during push-up plus exercise performed on the unstable surface, while the activity of upper trapezius increased during push up plus exercise performed on the stable surface. The angle of shoulder extension was significantly greater on the stable surface than on the unstable surface. The length of scapular adduction was significantly greater on the stable surface than on the unstable surface.[Conclusion] When the push-up plus exercise was performed on an unstable surface, recruitment of the periscapular muscles helped to stabilize the instable scapula.

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Shoulder muscle EMG activity during push up variations on and off a Swiss ball

Cited by 122 publications

References 14 publications

Standard maximum isometric voluntary contraction tests for normalizing shoulder muscle EMG

Standard maximum isometric voluntary contraction tests for normalizing shoulder muscle EMG

Three-Dimensional Scapular and Clavicular Kinematics and Scapular Muscle Activity During Retraction Exercises

Periscapular Muscle Activities and Kinematic Analysis of the Performed on Different Supporting Surfaces for the Lower Limbs Push-up Plus Exercise

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