Matthews Martyn J, Green Daniel, Matthews Helen, Swanwick Emma
School of Health Sciences, University of Salford, Frederick Road, Salford, Greater Manchester, M6 6PU, UK.
School of Health Sciences, University of Salford, Frederick Road, Salford, Greater Manchester, M6 6PU, UK.
Phys Ther Sport. 2017 Jan;23:118-122. doi: 10.1016/j.ptsp.2016.08.011. Epub 2016 Aug 30.
To investigate the effects of training induced fatigue on shoulder strength, ROM, joint position sense, and stroke length in elite competitive swimmers.
Seventeen national level swimmers performed maximum isometric strength (internal and external rotation), ROM, and joint position sense tests before and after a fatiguing 8 × 100 m training set. Stroke length, heart rate, blood lactate and blood glucose levels were recorded throughout.
Peak blood lactate, blood glucose levels, and heart rate increased significantly (P < 0.001) post-training confirming fatigue. Reductions were observed in stroke length of both arms (P < 0.001), external rotation range of motion (P < 0.001, -5.29°, Right shoulder; P = 0.04, -3.18°, Left shoulder) and joint position sense in their dominant (breathing side) arm (P = 0.03).
This investigation revealed a reduction in stroke length across both arms and also an arm bias in swimming whereby a greater reduction in both external rotation range and joint position sense was observed in the dominant arm when fatigued. This has highlighted a relationship between fatigue and potential mechanism of shoulder pathology in swimmers.
研究训练引起的疲劳对精英竞技游泳运动员肩部力量、活动范围、关节位置觉和划水长度的影响。
17名国家级游泳运动员在进行一组疲劳的8×100米训练前后，进行最大等长力量（内旋和外旋）、活动范围和关节位置觉测试。全程记录划水长度、心率、血乳酸和血糖水平。
训练后血乳酸峰值、血糖水平和心率显著升高（P<0.001），证实出现疲劳。双臂划水长度均下降（P<0.001），外旋活动范围下降（右肩P<0.001，下降5.29°；左肩P=0.04，下降3.18°），优势（呼吸侧）手臂的关节位置觉下降（P=0.03）。
本研究揭示了双臂划水长度均下降，且游泳存在手臂偏向性，即疲劳时优势手臂的外旋活动范围和关节位置觉下降幅度更大。这凸显了疲劳与游泳运动员肩部病理潜在机制之间的关系。
