BACKGROUND Mechanical loading during exercise has been shown to promote tissue remodeling. Safe and accessible exercise may be beneficial to populations at risk of diminished bone and joint health. We examined the effect of drop height and instruction on knee loading during a drop-landing task and proposed a task that makes use of drop heights that may be appropriate for rehabilitation purposes...

Stiffness is an uncommon complication after total knee arthroplasty, but at the same time it is a disabling problem for many patients. Outcomes of revision surgery for a stiff knee following arthroplasty have not been well evaluated, to our knowledge. The purpose of this literature is to define prevalence of stiffness after primary total knee replacement and also to evaluate the efficacy of rev...

Stiff-knee gait is a common walking problem in cerebral palsy characterized by insufficient knee flexion during swing. To identify factors that may limit knee flexion in swing, it is necessary to understand how unimpaired subjects successfully coordinate muscles and passive dynamics (gravity and velocity-related forces) to accelerate the knee into flexion during double support, a critical phase...

UNLABELLED Ankle-foot orthoses (AFOs) can provide support and improve walking ability in individuals with plantarflexor weakness. Passive-dynamic AFO stiffness can be optimized for over-ground walking, however little research exists for uphill walking, when plantarflexor contributions are key. PURPOSE Compare uphill walking biomechanics (1) between dynamic AFO users and able-bodied control su...

BACKGROUND Stiff knee gait, which may be seen in patients with upper motor neuron injury, describes a gait pattern with a relative loss of sagittal knee motion. It interferes with foot clearance during swing, often leading to inefficient compensatory mechanisms and ambulatory dysfunction. Distal rectus femoris muscle transfers and fractional lengthening of the vastus muscles have been performed...

Total Knee Arthroplasty operations are increasing in frequency, and knee flexion contracture is a common pathology, both pre-existing and post-operative. A 61-year-old male presented with knee flexion contracture following a total knee arthroplasty. Physical therapy alone did not fully reduce the contracture and dynamic splinting was then prescribed for daily low-load, prolonged-duration stretc...

1900 www.thelancet.com Vol 381 June 1, 2013 our report due to space limitations. The patient was thoroughly evaluated before enrolment, including a case review with her treating neurologist (GM) of more than 14 years. The patient fi rst noted stiff ness in her legs at age 36 years, 17 years before enrolment. Over several months, stiff ness pro gressed to fatigue, weakness in the legs, and then ...

Although landing in a plantarflexion and inversion position is a well-known characteristic of lateral ankle sprains, the associated kinematics of the knee and hip is largely unknown. Therefore, the purpose of this study was to examine the changes in knee and hip kinematics during landings on an altered landing surface of combined plantarflexion and inversion. Participants performed five drop la...