The slide-board training is a feasible technology to exercise skating during the off-season. While slide-board is much different from ice surface of the actual skating situation, it may distort actual skating posture. The purpose of this study was to analyze the differences in posture during push-off phase between an actual speed skating condition and on slideboard. The result showed that on th...

Introduction: A previous paper suggested that the curvature of the Achilles tendon, even under load, indicated that a retinaculum-like mechanism must exist to restrict posterior migration of the Achilles tendon as the ankle rotates [1]. It was further suggested that such a mechanism would modify the mechanics around the ankle such that the S/I displacement of the calcaneus would exceed the disp...

Total ankle replacement can be a challenging surgery especially when pre-operative deformity exists. Most authors advocate the indication for total ankle replacement should be narrowed to patients with less than 10 to 15 degrees of pre-operative varus or valgus. When greater than 10-15 degrees of coronal plane malalignment is found, ancillary procedures must be performed. We report a case of a ...

Joint kinetics have been estimated via inverse dynamics with link-segment models to analyze the performance of non-articulated energy storage and return (NA-ESR) prosthetic feet [1] and to examine the motor control strategies and compensations adopted by lower limb amputees [2]. A central assumption of the link-segment model commonly used in this application is that the ankle’s axis of rotation...

Despite many nonbattle injuries reported during deployment, few studies have been conducted to evaluate the effects of deployment on musculoskeletal and physiological characteristics and balance. A total of 35 active duty U.S. Army Soldiers participated in laboratory testing before and after deployment to Afghanistan. The following measures were obtained for each Soldier: shoulder, trunk, hip, ...

BACKGROUND: To describe the lower limb range of motion (ROM) profile in professional road cyclists.METHODS: Cohort study. One hundred and twenty-one cyclists volunteered to participate. ROM measurements passive hip flexion, extension, internal rotation, external knee flexion ankle dorsiflexion dominant non-dominant limbs were performed using an inclinometer. scores individually categorized as n...

Human standing requires control of multisegmental configuration. Does the postural system normally allow flexible adjustment of configuration, or does it minimize degrees of freedom at the ankle, knee, and hip joints? Gentle, external, unpredictable, sagittal, mechanical perturbations (randomized force, 1-10 N; duration, 0.2-2 s; and leg) were applied to either knee of 24 healthy participants w...

Ankle sprains are the most frequently occurring orthopedic injury among the physically active. The number 1 risk factor for suffering an ankle sprain is a history of a previous sprain. Those with a history of ankle sprain often report recurrent bouts of ankle instability and decreased functional capacity. Several mechanical and functional deficits have been identified that may contribute to res...

BACKGROUND Surgical specialties have become increasingly subspecialized. An expanding demand for foot and ankle care administered by trained specialists has driven the need for foot and ankle-trained orthopaedic surgeons. This survey was designed to elucidate the reasons why residents choose a career in foot and ankle surgery. METHODS We conducted a national, anonymous, 11-question survey of ...