Dos'Santos Thomas, McBurnie Alistair, Comfort Paul, Jones Paul A
Directorate of Sport, Exercise & Physiotherapy, University of Salford, Salford, Greater Manchester M6 6PU, UK.
Sports (Basel). 2019 Sep 6;7(9):205. doi: 10.3390/sports7090205.
Cutting manoeuvres are important actions associated with soccer performance and a key action associated with non-contact anterior cruciate ligament injury; thus, training interventions that can improve cutting performance and movement quality are of great interest. The aim of this study, therefore, was to determine the effects of a six-week change of dire[ction (COD) speed and technique modification training intervention on cutting performance and movement quality in male youth soccer players (U17s, n = 8) in comparison to a control group (CG) (U18s, n = 11) who continued 'normal' training. Cutting performance was assessed based on completion time and COD deficit, and the field-based cutting movement assessment score (CMAS) qualitative screening tool was used to assess cutting movement quality. Significant main effects for time (pre-to-post changes) ( ≤ 0.041, η = 0.224-0.839) and significant interaction effects of time and group were observed for cutting completion times, COD deficits, and CMASs. Improvements in completion time ( < 0.001, = 1.63-1.90, -9% to -11% vs. -5% to 6%) and COD deficit ( ≤ 0.012, = -1.63 to -2.43, -40-52% vs. -22% to -28%) for the COD intervention group (IG) were approximately two-times greater than the CG. Furthermore, lower CMASs (i.e., improved cutting movement quality) were only observed in the IG ( ≤ 0.025, = -0.85 to -1.46, -23% to -34% vs. 6-19%) compared to the CG. The positive changes in CMASs were attributed to improved cutting technique and reduced incidences of high-risk deficits such as lateral trunk flexion, extended knee postures, knee valgus, hip internal rotation, and improved braking strategies. The results of this study indicate that COD speed and technique modification training, in addition to normal skills and strength training, improves cutting performance and movement quality in male youth soccer players. Practitioners working with male youth soccer players should implement COD speed and technique modification training to improve cutting performance and movement quality, which may decrease potential injury-risk.
变向动作是与足球运动表现相关的重要动作，也是与非接触性前交叉韧带损伤相关的关键动作；因此，能够提高变向表现和动作质量的训练干预措施备受关注。因此，本研究的目的是确定为期六周的变向（COD）速度和技术改进训练干预对男性青少年足球运动员（U17组，n = 8）变向表现和动作质量的影响，并与继续进行“常规”训练的对照组（CG）（U18组，n = 11）进行比较。根据完成时间和COD差值评估变向表现，并使用基于场地的变向动作评估评分（CMAS）定性筛查工具评估变向动作质量。在变向完成时间、COD差值和CMAS方面观察到时间（前后变化）的显著主效应（≤0.041，η = 0.224 - 0.839）以及时间和组别的显著交互效应。COD干预组（IG）的完成时间改善（<0.001， = 1.63 - 1.90，-9%至-11% vs. -5%至6%）和COD差值改善（≤0.012， = -1.63至-2.43，-40 - 52% vs. -22%至-28%）比CG组大约高出两倍。此外，与CG组相比，仅在IG组中观察到较低的CMAS（即，变向动作质量提高）（≤0.025， = -0.85至-1.46，-23%至-34% vs. 6 - 19%）。CMAS的积极变化归因于变向技术的改进以及高风险差值（如侧躯干屈曲、膝关节伸展姿势、膝外翻、髋关节内旋）发生率的降低和制动策略的改善。本研究结果表明，除了常规的技能和力量训练外，COD速度和技术改进训练可提高男性青少年足球运动员的变向表现和动作质量。与男性青少年足球运动员合作的从业者应实施COD速度和技术改进训练，以提高变向表现和动作质量，这可能会降低潜在的受伤风险。
