Hertel Jay, Sloss Brent R, Earl Jennifer E
Kinesiology Program, University of Virginia, Charlottesville, VA 22904, USA.
Arch Phys Med Rehabil. 2005 Jan;86(1):26-30. doi: 10.1016/j.apmr.2004.03.029.
To compare electromyographic activity of the vastus medialis, vastus lateralis, and gluteus medius during functional activities in subjects with different foot types while wearing various off-the-shelf foot orthotics.
Experimental, controlled; 3 foot-type groups (pes planus, pes cavus, pes rectus) each tested in 4 orthotic conditions while performing 3 different exercises.
Laboratory.
Thirty healthy young adults, 10 with each foot type.
Four conditions: no orthotic, 7 degrees medial rearfoot post, 4 degrees lateral rearfoot post, and neutral rearfoot post.
Surface electromyographic activity for the vastus medialis, vastus lateralis, and gluteus medius during single-leg squatting, lateral stepdown, and maximum vertical jump exercises.
Greater vastus medialis and gluteus medius activity was found with all 3 orthotic conditions, regardless of subject foot type, during the single-leg squat and lateral stepdown. Less vastus lateralis activity was found with the vertical jump with all orthotic conditions, again regardless of foot type.
During slow controlled exercises such as the single-leg squat and lateral stepdown, vastus medialis and gluteus medius activity may be enhanced with an off-the-shelf orthotic, regardless of posting or foot type. These same findings do not appear to carry over to a more explosive task such as the maximal vertical jump.
比较不同足型受试者在穿戴各种现成足矫形器进行功能活动时，股内侧肌、股外侧肌和臀中肌的肌电图活动。
实验性、对照性研究；3个足型组（扁平足、高弓足、正常足），每组在4种矫形器条件下进行3种不同运动测试。
实验室。
30名健康年轻成年人，每种足型10人。
4种条件：不穿戴矫形器、后足内翻7度、后足外翻4度和后足中立位。
单腿深蹲、侧向台阶下降和最大垂直跳运动过程中股内侧肌、股外侧肌和臀中肌的表面肌电图活动。
在单腿深蹲和侧向台阶下降过程中，无论受试者足型如何，所有3种矫形器条件下股内侧肌和臀中肌的活动均增强。在垂直跳过程中，所有矫形器条件下股外侧肌的活动均减少，同样与足型无关。
在单腿深蹲和侧向台阶下降等缓慢控制的运动中，无论足型或矫形器类型如何，现成的足矫形器可能会增强股内侧肌和臀中肌的活动。这些结果似乎不适用于像最大垂直跳这样更具爆发力的任务。
