Wyon Matthew A, Cloak Ross, Lucas Josephine, Clarke Frances
Research Centre for Sport Exercise and Performance, University of Wolverhampton, Gorway Rd., Walsall, West Midlands WS1 3BD, UK. Tel 44 01902-323144.
Med Probl Perform Art. 2013 Dec;28(4):195-8.
Landing from jumps is one of the main causes of injury within dance. A number of studies have reported a negative effect of shoe midsole thickness on lower limb kinematics during running due to the reduction in afferent sensory outputs from the foot's epithelium. The purpose of this study was to examine the influence of varying midsole thicknesses in dance shoes on dynamic postural stability during a single-leg landing. Twenty-eight female undergraduate dance participants volunteered for the study. They carried out three trials under four conditions: barefoot and in ballet flats (2 mm midsole thickness), jazz shoes (7 mm), and dance sneakers (30 mm). The task consisted of a single-leg forward jump over a hurdle at 50% of their maximal vertical jump height, landing on a force platform, and balancing for 3 seconds. The stability indices for vertical stability (VSI), anterior-posterior stability (APSI), medial-lateral stability (MLSI), and dynamic postural stability (DPSI) were calculated using Wikstrom's revised method. Significant differences were reported between the midsole thicknesses for both DPSI and VSI (p<0.01). No statistical differences were noted for the indices SPSI or MLSI. The present data agree with the running studies in that increased midsole thickness has a negative influence on landing stability.
跳跃落地是舞蹈中受伤的主要原因之一。一些研究报告称，由于足部上皮传入感觉输出减少，跑鞋中底厚度对跑步时下肢运动学有负面影响。本研究的目的是探讨舞蹈鞋中底厚度变化对单腿落地时动态姿势稳定性的影响。28名女性本科舞蹈参与者自愿参加了这项研究。她们在四种条件下进行了三次试验：赤脚以及穿着平底芭蕾舞鞋（中底厚度2毫米）、爵士舞鞋（7毫米）和舞蹈运动鞋（30毫米）。任务包括在达到最大垂直跳跃高度50%的高度单腿向前跳过一个跨栏，落在测力平台上，并保持平衡3秒。使用维克斯特伦修订方法计算垂直稳定性（VSI）、前后稳定性（APSI）、内外侧稳定性（MLSI）和动态姿势稳定性（DPSI）的稳定性指标。DPSI和VSI在不同中底厚度之间均存在显著差异（p<0.01）。SPSI或MLSI指标未发现统计学差异。目前的数据与跑步研究一致，即中底厚度增加对落地稳定性有负面影响。
