PNF and Movement

Korea Proprioceptive Neuromuscular Facilitation Association (대한고유수용성신경근촉진법학회)
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Comparison Among Shoulder Diagonal Pattern of Exercises Considering Phase of Contraction Based on Muscle Activity

상지의 대각선 운동형태와 수축형태에 따른 근활성도 비교연구

  • Soo-Han Kim (Department of Physical Therapy, Kaya University) ;
  • Se-Yeon Park (Department of Physical Therapy, Uiduk University)
  • 김수한 (가야대학교 물리치료학과) ;
  • 박세연 (위덕대학교 물리치료학과)
  • Received : 2024.04.02
  • Accepted : 2024.04.08
  • Published : 2024.04.30
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Abstract

Purpose: The present study investigated how variations in diagonal exercises affect shoulder muscle activity, examining changes in neuromuscular activation during scapular and shoulder diagonal patterns of exercises. Furthermore, we explored whether the exercise phase affects muscle activation. Methods: Sixteen asymptomatic male participants were recruited. Four diagonal pattern exercises (scapular anterior elevation, posterior elevation, flexion-adduction-external rotation, flexion, abduction-external rotation), and two exercise phases (concentric and eccentric) were administered. Surface electromyography data were collected. Results: Upper trapezius activity was significantly higher during the concentric phase of scapular posterior elevation exercises compared with the others (p<0.05). The serratus anterior, anterior deltoid, and infraspinatus activities were significantly higher during shoulder diagonal pattern exercises compared with the scapular diagonal pattern exercises (p<0.05). Except for the lower trapezius, muscular activities during the concentric phase were significantly greater compared with the eccentric phase (p<0.05). Conclusion: The current study suggests that the diagonal pattern of exercise may contribute to selective strengthening of the shoulder complex muscles and that the form of exercise should be tailored to the subject. It also suggests that diagonal exercises with concentric contractions tend to be more beneficial than eccentric contractions for overall muscle recruitment, but the effects vary for specific diagonal patterns.

Keywords

Acknowledgement

This research was supported by the Kaya University.

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