Investigation of the biomechanical effect of variable stiffness shoe on external knee adduction moment in various dynamic exercises
نویسندگان
چکیده
BACKGROUND The growing ageing population and high prevalence of knee osteoarthritis (OA) in athletes across nations have created a strong demand for improved non-invasive therapeutic alternatives for knee OA. The aim of this study is to investigate the effect of the variable stiffness shoe (VSS), a new non-invasive therapeutic approach, on external knee adduction moment (EKAM) in various dynamic exercises. EKAM is believed to have positive correlation with the progression and development of knee OA. METHODS Thirty young participants (16 male and 14 female; age 22.6 ± 1.9 years) from National University of Singapore were enrolled in this study. The tested activities were walking, running, drop-landing, and lateral hopping. All the dynamic exercises were recorded simultaneously by the 8-camera VICON Motion Systems (Oxford Metric, UK) with a sampling rate of 100 Hz. RESULTS The results showed that the EKAM was reduced in all the dynamic exercises with the use of VSS. The VSS produced significant reductions in the peak EKAM during walking (4.97%, p = 0.039), running (11.15%, p = 0.011), drop-landing (11.18%, p = 0.038) and lateral hopping (17.34%, p = 0.023) as compared to the control shoe. CONCLUSIONS The reduction of EKAM with the use of VSS in various dynamic exercises demonstrates its potential in delaying the onset and the progression of knee OA in early stage of knee OA patients.
منابع مشابه
Variable Stiffness Shoe Alters Muscle Activations and Knee Joint Moments
Medial compartment knee osteoarthritis (OA) is nearly 10 times more common than lateral compartment OA [1] and develops in approximately 20-40 % of adults over the age of 60 [2]. A high maximum knee adduction moment in walking has been associated with OA rate of progression, treatment outcome, and disease severity. The use of a shoe intervention with a more rigid lateral compared to medial mids...
متن کاملLoad-modifying Footwear Intervention Does Lower Knee Adduction Moment in Subjects with Symptoms of Medial Compartment Knee Osteoarthritis
INTRODUCTION A high maximum adduction moment at the knee during walking has been associated with the treatment outcome (Andriacchi 1994) and rate of progression (Miyazaki et al. 2002) of medial compartment knee osteoarthritis (OA). Consequently, many interventions for knee OA are aimed at reducing the maximum knee adduction moment. While footwear modifications, using wedged insoles or shoes (Cr...
متن کاملAnkle rotation changes and its influences in knee osteoarthritis
Background : Biomechanical factors are known to be important in knee osteoarthritis (OA) development and progression. This study was designed to determine changes of hamstrings muscle activation, knee adduction moment and ankle rotation angle in two knee osteoarthritis (mild and moderate) and a healthy control group. Methods: 16 females (10 with mild and 6 with moderate medial knee osteoart...
متن کاملAnkle motion influences the external knee adduction moment and may predict who will respond to lateral wedge insoles?: an ancillary analysis from the SILK trial
OBJECTIVE Lateral wedge insoles are a potential simple treatment for medial knee osteoarthritis (OA) patients by reducing the external knee adduction moment (EKAM). However in some patients, an increase in their EKAM is seen. Understanding the role of the ankle joint complex in the response to lateral wedge insoles is critical in understanding and potentially identifying why some patients respo...
متن کامل