当前位置： SCI文献检索 > JOURNAL OF ATHLETIC TRAINING期刊下所有文献 > Neuromuscular characteristics of individuals displaying excessive medial knee displacement.

Neuromuscular characteristics of individuals displaying excessive medial knee displacement.

Abstract：

CONTEXT:Knee-valgus motion is a potential risk factor for certain lower extremity injuries, including anterior cruciate ligament injury and patellofemoral pain. Identifying neuromuscular characteristics associated with knee-valgus motion, such as hip and lower leg muscle activation, may improve our ability to prevent lower extremity injuries. OBJECTIVE:We hypothesized that hip and lower leg muscle-activation amplitude would differ among individuals displaying knee valgus (medial knee displacement) during a double-legged squat compared with those who did not display knee valgus. We further suggested that the use of a heel lift would alter lower leg muscle activation and frontal-plane knee motion in those demonstrating medial knee displacement. DESIGN:Descriptive laboratory study. SETTING:Research laboratory. PATIENTS OR OTHER PARTICIPANTS:A total of 37 healthy participants were assigned to the control (n = 19) or medial-knee-displacement (n = 18) group based on their double-legged squat performance. MAIN OUTCOME MEASURE(S):Muscle-activation amplitude for the gluteus maximus, gluteus medius, adductor magnus, medial and lateral gastrocnemius, and tibialis anterior was measured during 2 double-legged squat tasks. The first task consisted of performing a double-legged squat without a heel lift; the second consisted of performing a double-legged squat task with a 2-in (5.08-cm) lift under the heels. RESULTS:Muscle-activation amplitude for the hip adductor, gastrocnemius, and tibialis anterior was greater in those who displayed knee valgus than in those who did not (P < .05). Also, use of heel lifts resulted in decreased activation of the gluteus maximus, hip adductor, gastrocnemius, and tibialis anterior muscles (P < .05). Use of heel lifts also eliminated medially directed frontal-plane knee motion in those displaying medial knee displacement. CONCLUSIONS:Medial knee displacement during squatting tasks appears to be associated with increased hip-adductor activation and increased co-activation of the gastrocnemius and tibialis anterior muscles.

journal_name

J Athl Train

journal_title

Journal of athletic training

authors

Padua DA,Bell DR,Clark MA

doi

10.4085/1062-6050-47.5.10

subject

Has Abstract

pub_date

2012-09-01 00:00:00

pages

525-36

issue

eissn

1062-6050

issn

1938-162X

journal_volume

pub_type

杂志文章

在线工具

Neuromuscular characteristics of individuals displaying excessive medial knee displacement.