Relationship Between the Closed Kinetic Chain Upper Extremity Stability Test and Strength of Serratus Anterior and Triceps Brachii Muscles

Abstract

Background:The CKCUES test evaluates the functional performance of the shoulder joint.The CKCUES test scores CKC exercises of the upper limbs to examine shoulder stability. Although the CKCUES test provides quantitative data on functional ability and performance, no study has determined the relationship between CKCUES scores and SA and TB muscle strength. Objects:The objective of this study is to determine the relationship between the CKCUES test scores and the strength of the SA and TB muscles in the CKCUES and unilateral CKCUES tests.Methods: Sixty-six healthy male volunteers participated in the study. A Smart KEMA strength sensor measured SA and TB muscle strength. Two parallel lines on the floor indicated the initial hand placement to start CKCUES tests. For 15 seconds, the subject raises one hand and reaches over to touch the supporting hand, then returns to the starting position. Results:The correlation between the CKCUES test scores and the strength of the SA was strong (r = 0.650, p < 0.001), and the TB was moderate (r = 0.438, p < 0.001). The correlation between the unilateral CKCUES test and the strength of the SA of the supporting side was strong (r = 0.605, p < 0.001), and swing side was strong (r = 0.681, p < 0.001). The correlation between the unilateral CKCUES test and the strength of the TB of the supporting side was moderate (r = 0.409, p < 0.001), and swing side was moderate (r = 0.482, p < 0.001). Conclusion:Our study showed that the CKCUES test had a strong association with isometric strength of SA and moderate association with that of TB. These findings suggest that the CKCUES test can evaluate the function of the SA. Moreover, the unilateral CKCUES test can evaluate unilateral shoulder function.

Role of kinetic chain in sports performance and injury risk: a narrative review

“…For kicking to happen, the trunk generates a sequential JOURNAL of MEDICINE and LIFE. VOL: 16 ISSUE: 11 NOVEMBER 2023 Licensed under CC BY 4.0 strength of serratus anterior and moderately with that of triceps brachii [73].…”

“…Its performance strongly correlates with the isokinetic strength of shoulder flexors and elbow extensors at 180°/s for men [ 71 ]. It is strongly associated with the isometric strength of serratus anterior and moderately with that of triceps brachii [ 73 ].…”

The Relationship Between Upper Extremity, Trunk and Hip Muscle Strength and the Modified Upper Quarter Y-balance Test

“…Various functional tests are used in the medical, sports, and training fields to assess scapular stability and mobility [1] because they are easy to perform, inexpensive, and capable of providing essential information on functional performance [1,2]. Functional tests can measure basic elements of functional movement (muscle strength, mobility, and stability) or specific physical movements [3,4] and can also be used as criteria for return after rehabilitation or may identify people at risk of injury [3].…”

“…Functional tests can measure basic elements of functional movement (muscle strength, mobility, and stability) or specific physical movements [3,4] and can also be used as criteria for return after rehabilitation or may identify people at risk of injury [3]. The upper quarter Y-balance test (UQYBT) and the closed kinetic chain upper limb stability test are commonly used to evaluate the stability and mobility of the upper extremity with good reliability in closed kinetic chain position [1,[5][6][7][8]. UQYBT allows quantitative evaluation of physical ability by reaching the arm in different directions with one hand while supporting the body with the other hand [7].…”

“…Pearson's correlation was used to assess the correlation between the isometric strength of the muscles (scapular protractor, LT, hip flexors, trunk flexor, and trunk extensor) and the score for each direction and the composite score of UQYBT. The British Medical Journal's classifications recommended the level of association was graded as follows: 0-0.19 extremely weak, 0.2-0.39 weak, 0.40-0.59 moderate, 0.6-0.79 as strong, and 0.8-1.0 very strong[1,18].…”