Karagiannakis Dimitris, Athanasopoulos Spyros, Mandalidis Dimitris
Laboratory of Sports Physical Therapy, School of Physical Education and Sports Science, National and Kapodistrian University of Athens, Greece.
Laboratory of Sports Physical Therapy, School of Physical Education and Sports Science, National and Kapodistrian University of Athens, Greece.
J Bodyw Mov Ther. 2018 Jul;22(3):580-585. doi: 10.1016/j.jbmt.2017.09.018. Epub 2017 Sep 28.
BACKGROUND/AIM: Resting scapular asymmetry with a more protracted and depressed position of the scapula in the dominant throwing side relative to the scapula of the contralateral side is commonly detected in overhead athletes with both healthy and disabled shoulders. It has been proposed that possible alterations in the EMG activity of periscapular muscles due to asymmetric position of the scapula may alter its kinematics leading to shoulder pathology. The aim of the current study was to identify possible alterations in the activation of periscapular muscles of healthy female volleyball players with scapular asymmetry in the resting position.
Resting position of the scapula was determined in 37 healthy professional female volleyball players. Twenty-two players, with the scapula of the dominant side in a more protracted and depressed position compared to the non-dominant side, were classified as the asymmetry group. Fifteen players with almost symmetrical position of both scapulae comprised the control group. All participants performed an upper extremity closed chain exercise (knee push-ups) on a stable (floor) and an unstable surface (BOSU platform), while the EMG activity of serratus anterior (SA), upper trapezius (UT) and middle trapezius (MT) was recorded bilaterally.
No significant group (asymmetry vs. control) by side (dominant vs. non-dominant) by surface condition (floor vs. BOSU platform) interaction was detected with regard to the EMG activity of SA, UT and MT. Although not statistically significant the asymmetry group demonstrated a tendency for reduced EMG activity of the SA on the dominant compared to the contra-lateral side and compared to the dominant side of the control group.
The EMG activity of periscapular muscles (SA, UT and MT) was not affected during execution of a close chain exercise in healthy female volleyball players with the scapula of the dominant side in a more protracted and depressed resting position.
背景/目的：在肩部健康和存在功能障碍的过头运动运动员中，常检测到静息时肩胛不对称，即优势投掷侧肩胛骨相对于对侧肩胛骨处于更前伸和下移的位置。有人提出，由于肩胛骨位置不对称，肩胛周围肌肉的肌电图（EMG）活动可能发生改变，进而改变其运动学，导致肩部病变。本研究的目的是确定静息位肩胛不对称的健康女性排球运动员肩胛周围肌肉激活的可能变化。
确定了37名健康职业女性排球运动员肩胛骨的静息位。22名运动员优势侧肩胛骨相对于非优势侧处于更前伸和下移的位置，被归为不对称组。15名两侧肩胛骨位置几乎对称的运动员组成对照组。所有参与者在稳定表面（地面）和不稳定表面（BOSU平台）上进行上肢闭链运动（跪姿俯卧撑），同时双侧记录前锯肌（SA）、上斜方肌（UT）和中斜方肌（MT）的EMG活动。
在前锯肌、上斜方肌和中斜方肌的EMG活动方面，未检测到显著的组（不对称组与对照组）×侧（优势侧与非优势侧）×表面条件（地面与BOSU平台）交互作用。尽管无统计学意义，但与对侧相比以及与对照组的优势侧相比，不对称组优势侧前锯肌的EMG活动有降低的趋势。
对于优势侧肩胛骨处于更前伸和下移静息位的健康女性排球运动员，在进行闭链运动时，肩胛周围肌肉（前锯肌、上斜方肌和中斜方肌）的EMG活动未受影响。
