Cotter Joshua A, Jamison Steve T, Schloemer Sarah A, Chaudhari Ajit M W
1Department of Kinesiology, California State University, Long Beach, California; 2Department of Physical Medicine and Rehabilitation, Spaulding National Running Center, Harvard Medical School, Cambridge, Massachusetts; 3Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, Ohio; and 4Division of Physical Therapy, School of Health and Rehabilitation Sciences, The Ohio State University, Columbus, Ohio.
J Strength Cond Res. 2017 Jun;31(6):1627-1635. doi: 10.1519/JSC.0000000000001632.
The purpose of this study was to examine the effect of a neuromuscular dentistry-designed mouthguard (NMDD) on dynamic movement ability. Forty-two competitive athletes (8 women, 21.9 ± 2.9 years, 66.8 ± 18.8 kg, 1.68 ± 0.11 m; 34 men, 22.8 ± 4.8 years, 77.4 ± 12.7 kg, 1.78 ± 0.08 m) with greater than 2 years' experience in their designated sport were enrolled in the study. Participants completed the Functional Movement Screen (FMS), modified Star Excursion Balance Test (mSEBT), and a single-leg landing (SLL) task. Each subject was tested with 3 separate mouthguard conditions in random order: (a) no mouthguard (NO), (b) over-the-counter boil-and-bite mouthguard (BB; Shockdoctor Gravity, (c) and an NMDD (Pure Power Elite). Data were analyzed using a repeated-measures analysis of variance for each variable. There were no differences between mouthguard conditions in each of the 7 individual components or composite FMS score (p > 0.05). No differences were seen in the anterior, posteromedial, or posterolateral movements of the mSEBT; overall composite score; or time-to-contact measurements (p > 0.05). The BB condition (2.16 Nm·kg) exhibited higher peak knee valgus moments (pKVM) on the right leg only when compared with the NMDD condition (1.95 Nm·kg; p = 0.003) but not the NO condition (2.09 Nm·kg; p = 0.7262) during the SLL task. No differences in pKVM were seen on the left leg (p = 0.324). In conclusion, an NMDD was not effective at enhancing or diminishing measures of dynamic movement ability compared with BB or NO conditions.
本研究的目的是检验一种神经肌肉牙科设计的护齿器（NMDD）对动态运动能力的影响。42名在其指定运动项目中有超过2年经验的竞技运动员（8名女性，年龄21.9±2.9岁，体重66.8±18.8千克，身高1.68±0.11米；34名男性，年龄22.8±4.8岁，体重77.4±12.7千克，身高1.78±0.08米）参与了本研究。参与者完成了功能性动作筛查（FMS）、改良星状偏移平衡测试（mSEBT）和单腿落地（SLL）任务。每个受试者以随机顺序在3种不同的护齿器条件下进行测试：（a）不使用护齿器（NO），（b）非处方的煮沸咬合式护齿器（BB；Shockdoctor Gravity），（c）以及一种NMDD（Pure Power Elite）。对每个变量使用重复测量方差分析来分析数据。在7个单独组件或综合FMS评分中的每一项，护齿器条件之间均无差异（p>0.05）。在mSEBT的前向、后内侧或后外侧运动、总体综合评分或接触时间测量中均未发现差异（p>0.05）。在SLL任务期间，仅与NMDD条件（1.95 Nm·kg；p = 0.003）相比，BB条件（2.16 Nm·kg）在右腿上表现出更高的峰值膝内翻力矩（pKVM），但与NO条件（2.09 Nm·kg；p = 0.7262）相比无差异。左腿的pKVM未见差异（p = 0.324）。总之，与BB或NO条件相比，NMDD在增强或减弱动态运动能力指标方面无效。
