Pietraszewski Przemysław, Gołaś Artur, Krzysztofik Michał
Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education in Katowice, Katowice Poland.
J Hum Kinet. 2021 Oct 31;80:309-316. doi: 10.2478/hukin-2021-0111. eCollection 2021 Oct.
The purpose of this study was to assess whether peak surface electromyography (sEMG) amplitude of selected lower limb muscles differed during a) curve and straight sprinting, b) sprinting in inside and outside lanes between lower limbs. Eleven well-trained female sprinters (personal best: 24.1 ± 1.1 s) were included in a randomized within-subject design study, in which participants underwent two experimental conditions: all-out 200 m indoor sprints in the innermost and outermost lane. Peak sEMG amplitude was recorded bilaterally from gastrocnemius medialis, biceps femoris, gluteus maximus, tibialis anterior, and vastus lateralis muscles. Left gastrocnemius medialis peak sEMG amplitude was significantly higher than for the right leg muscle during curve (p = 0.011) and straight sprinting (p < 0.001) when sprinting in the inside lane, and also significantly higher when sprinting in the inside vs. outside lane for both curve and straight sprinting (p = 0.037 and p = 0.027, respectively). Moreover, left biceps femoris peak sEMG amplitude was significantly higher during straight sprinting in the inside vs. outside lane (p = 0.006). Furthermore, right and left vastus lateralis peak sEMG amplitude was significantly higher during curve sprinting in the inside lane (p = 0.001 and p = 0.004, respectively) and for the left leg muscle peak sEMG amplitude was significantly higher during curve compared to straight sprinting in the outside lane (p = 0.024). Results indicate that curve sprinting creates greater demands mainly for the gastrocnemius medialis of the inner than the outer leg, but the degree of these requirements seems to depend on the radius of the curve, thus significant changes were noted during sprinting in the inside lane, but not in the outside lane.
本研究的目的是评估在以下两种情况下，所选下肢肌肉的表面肌电图（sEMG）峰值幅度是否存在差异：a）弯道冲刺和直线冲刺；b）下肢在内侧和外侧跑道冲刺。11名训练有素的女性短跑运动员（个人最好成绩：24.1±1.1秒）参与了一项随机的受试者内设计研究，其中参与者经历了两种实验条件：在最内侧和最外侧跑道进行全力200米室内短跑。从双侧的腓肠肌内侧头、股二头肌、臀大肌、胫骨前肌和股外侧肌记录sEMG峰值幅度。在内侧跑道冲刺时，左侧腓肠肌内侧头的sEMG峰值幅度在弯道（p = 0.011）和直线冲刺（p < 0.001）时均显著高于右侧腿部肌肉，并且在弯道和直线冲刺时，在内侧跑道冲刺相对于外侧跑道冲刺时也显著更高（分别为p = 0.037和p = 0.027）。此外，在直线冲刺时，左侧股二头肌的sEMG峰值幅度在内侧跑道相对于外侧跑道显著更高（p = 0.006）。此外，右侧和左侧股外侧肌的sEMG峰值幅度在弯道冲刺时在内侧跑道显著更高（分别为p = 0.001和p = 0.004），并且对于左侧腿部肌肉，在外侧跑道弯道冲刺时的sEMG峰值幅度相对于直线冲刺显著更高（p = 0.024）。结果表明，弯道冲刺主要对内侧腿的腓肠肌内侧头产生更大的需求，而不是外侧腿，但这些需求的程度似乎取决于弯道半径，因此在内侧跑道冲刺时观察到显著变化，而在外侧跑道则没有。
