Pollock Courtney L, Jenkyn Thomas R, Jones Ian C, Ivanova Tanya D, Garland S Jayne
School of Physical Therapy, The University of Western Ontario, London, Ontario, Canada.
Med Sci Sports Exerc. 2009 Mar;41(3):628-36. doi: 10.1249/MSS.0b013e31818c1300.
The purpose of this study was to characterize the EMG of trunk muscles together with kinematics of the pelvis and the spine of elite female rowers during the rowing stroke.
Nine Rowing Canada national team candidates performed a 2000-m race simulation. EMG activity of spinal and pelvic extensor and flexor muscles and kinematic data of the pelvis and the spine were collected and analyzed during the period of peak force production.
During this period, pelvic and spinal extensor muscles demonstrated similarities in the timing of muscle activity with minimal coactivation of flexors and extensors. Minimal excursion of spinal segments occurred during the stroke with most of the extension occurring at the pelvis. Flexor activity occurred toward late drive, suggesting that trunk extension is slowed by increasing activity of the flexor muscles.
This study provides data of trunk kinematics and muscle recruitment patterns in elite female rowers. During the period of peak force production, there is minimal coactivation of trunk flexor and extensor muscles and, of the spinal segments, L3-S1 shows the most movement, which may make it more susceptible to soft tissue injury.
本研究旨在描述优秀女子赛艇运动员在划桨过程中躯干肌肉的肌电图（EMG）以及骨盆和脊柱的运动学特征。
九名加拿大赛艇国家队候选人进行了2000米比赛模拟。在最大力量产生阶段，收集并分析脊柱和骨盆伸肌与屈肌的肌电活动以及骨盆和脊柱的运动学数据。
在此阶段，骨盆和脊柱伸肌在肌肉活动时间上表现出相似性，屈肌和伸肌的共同激活程度最低。划桨过程中脊柱节段的移动最小，大部分伸展发生在骨盆。屈肌活动在驱动后期出现，表明屈肌活动增加会减缓躯干伸展。
本研究提供了优秀女子赛艇运动员躯干运动学和肌肉募集模式的数据。在最大力量产生阶段，躯干屈肌和伸肌的共同激活程度最低，在脊柱节段中，L3-S1的运动最多，这可能使其更容易受到软组织损伤。
