Scapulothoracic muscle activity during kinetic chain variations of a prone elevation exercise

Borms, Dorien; Maenhout, Annelies; Berckmans, Kelly; Spanhove, Valentien; Vanderstukken, Fran; Cools, Ann

doi:10.1016/j.bjpt.2022.100420

Cited by 6 publications

(9 citation statements)

References 43 publications

(87 reference statements)

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“…26,27 In addition, it has been proposed that in tendon transfers due to irreparable rotator cuff tears, MT can mimic the force vector of the supraspinatus muscle, presenting a biomechanical advantage for this type of intervention. 28 Similarly, the PHABER exercise showed an activation amplitude of MT and LT above 60% MVIC and of UT close to 20% MVIC (similar findings to previous studies), 9,22,25 which allows for establishing an optimal muscular balance while the recruitment of motor units is sufficient to develop rotational torque at the glenohumeral joint.…”

Section: Prone Horizontal Abduction With External Rotationsupporting

confidence: 84%

“…Determining which scapular exercises were appropriated to optimize scapular neuromuscular control, the following criteria had to be met: (1) a target scapular muscle (LT, MT, or SA) had to present a sEMG amplitude classified as high 8,9,25 ;…”

Section: Discussionmentioning

confidence: 99%

“…All sEMG activity values of SA and each trapezius muscles were normalized and expressed as a percentage of MVIC (% MVIC). Furthermore, to facilitate the sEMG amplitude interpretation, values were categorized as low activity (<20% MVIC), moderate activity (20%–50% MVIC), or high activity (>50% MVIC) 8,25 …”

Section: Methodsmentioning

confidence: 99%

“…Furthermore, to facilitate the sEMG amplitude interpretation, values were categorized as low activity (<20% MVIC), moderate activity (20%-50% MVIC), or high activity (>50% MVIC). 8,25 Muscle ratios among the scapular muscles during the selected exercises were investigated through the relative activity of the UT with respect to the MT, LT, and SA. Muscle ratios were calculated by dividing normalized sEMG values of the UT by normalized sEMG values of the LT, MT, and SA, resulting in the muscle ratios UT/LT, UT/MT, and UT/SA.…”

Section: Data Processingmentioning

confidence: 99%

“…Possibly, the incorporation of external rotation to the movements of arm elevation (e.g., abduction and flexion) in a standing position increases the activity of the MT and LT. 25 This could be due to the synergistic activity of the MT and LT with the infraspinatus, teres minor, and supraspinatus muscles. Indeed, an increase in the sEMG amplitude of the teres minor and LT has been observed during the execution of an external rotation with the arm in 90 degrees of abduction in the scapular plane.…”

Section: Prone Horizontal Abduction With External Rotationmentioning

confidence: 99%

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A comparative electromyographic study of scapular stabilizing muscles during five main rehabilitation exercises

Mendez-Rebolledo,

Araya-Quintanilla,

Guzmán-Muñoz

et al. 2024

Am J Phys Med Rehabil

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Objective To compare the surface electromyographic (sEMG) amplitude, activation ratio, and onset latency of the main scapular stabilizing muscles between five typical rehabilitative exercises. Design Twenty-seven healthy participants performed five scapular exercises [wall-slide (WS), wall push-up plus, prone horizontal abduction with external rotation (PHABER), external rotation in side-lying (ERSL), and low row] while simultaneously recording sEMG of serratus anterior (SA), middle trapezius (MT), lower trapezius (LT), and upper trapezius (UT). sEMG amplitudes, onset latencies, and activation ratios were calculated. Results PHABER showed an excellent UT/MT (0.43) and UT/LT (0.30) muscle balance with high (> 50% MVIC) MT and LT amplitudes, a low (< 20% MVIC) UT amplitude, and an early activation of the scapular stabilizing muscles (-474.7 to 89.9 ms) relative to UT. ERSL showed excellent UT/SA (0.26), UT/MT (0.32), and UT/LT (0.21) activation ratios; and along with LR and WS, showed early activation of the scapular stabilizing muscles (-378.1 to -26.6 ms). Conclusions PHABER presented optimal scapular neuromuscular control. Although ERSL, low row, and WS did not meet all the criteria associated with optimal scapular neuromuscular control, these exercises could be used in early stages of shoulder rehabilitation because they favor early activation of the scapular stabilizing muscles.

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Section: Prone Horizontal Abduction With External Rotationsupporting

confidence: 84%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Data Processingmentioning

confidence: 99%

Section: Prone Horizontal Abduction With External Rotationmentioning

confidence: 99%

See 3 more Smart Citations

A comparative electromyographic study of scapular stabilizing muscles during five main rehabilitation exercises

Mendez-Rebolledo,

Araya-Quintanilla,

Guzmán-Muñoz

et al. 2024

Am J Phys Med Rehabil

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Electromyographic Comparison of Exercises for Scapulothoracic Muscle Activation in Men with Upper Crossed Syndrome: A Cross-Sectional Study

Bayattork,

Seidi,

Yaghoubitajani

et al. 2024

Journal of Bodywork and Movement Therapies

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Scapular Kinematics in Overhead Squat with and without Elastic Resistance: Insights from Kinetic Chain Approach and Therapeutic Implications for Shoulder Rehabilitation

Salles,

Pascoal

2023

Preprint

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The overhead squat movement engages various bodily structures, and its interaction with three-dimensional elastic resistance along the kinetic chain approach remains insufficiently comprehended. This study aimed to describe the scapular kinematics during an overhead squat with the forearm in a supination exercise against an ER and clarify the therapeutic potential of this exercise on scapular rehabilitation. Using an electromagnetic tracking system, we recorded the three-dimensional shoulder kinematics of 19 male participants across seven humeral elevation positions. These positions were captured at 15-degree intervals, spanning from 30 to 120 degrees. The results indicated notable distinctions in scapular upward rotation [F(1,17)=6.09, p=0.024] and scapular posterior tilt [F(1,17)=6.04, p=0.025] between the phases. Furthermore, the interactions revealed significant differences in resistance and phases during humeral elevation for scapular upward/downward rotation [F(3.77,62.48)=7.99, p&lt;0.001], scapular internal/external rotation [F(2.98, 50.64, p&lt;0.001)], and scapular tilt [F(2.58, 43.81)=4.76, p=0.008]. The findings demonstrated that increasing resistance through elastic resistance played a pivotal role in enhancing scapular stability throughout the humerus elevation motion. This underscores the potential of the overhead squat movement as a valuable tool for both shoulder assessment and treatment.

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Scapulothoracic muscle activity during kinetic chain variations of a prone elevation exercise

Cited by 6 publications

References 43 publications

A comparative electromyographic study of scapular stabilizing muscles during five main rehabilitation exercises

A comparative electromyographic study of scapular stabilizing muscles during five main rehabilitation exercises

Electromyographic Comparison of Exercises for Scapulothoracic Muscle Activation in Men with Upper Crossed Syndrome: A Cross-Sectional Study

Scapular Kinematics in Overhead Squat with and without Elastic Resistance: Insights from Kinetic Chain Approach and Therapeutic Implications for Shoulder Rehabilitation

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