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Approximate entropy (ApEn) and sample entropy (SampEn) are mathematical algorithms created to measure the repeatability or predictability within a time series. Both algorithms are extremely sensitive to their input parameters: m (length of the data segment being compared), r (similarity criterion), and N (length of data). There is no established consensus(More)
OBJECTIVE To investigate the effects of cane use on spatiotemporal gait parameters, pain, and function in adults with hip osteoarthritis (OA). DESIGN Prospective observational study. SETTING An academic tertiary Veterans Affairs Healthcare Center. PARTICIPANTS Thirteen adults with symptomatic hip OA and 13 healthy adults. METHODS We undertook gait(More)
Disturbances in balance are one of the first reported symptoms of Multiple Sclerosis (MS), yet limited research has been performed to classify the postural control deficits in this population. This study investigated the variability present in the sway patterns during quiet standing in patients with MS (PwMS) and healthy controls. Subjects were assessed(More)
OBJECTIVE To determine the effects of ipsilateral and contralateral cane use on gait kinematics and peak vertical force in young healthy adults. DESIGN Prospective observational study. SETTING Veterans Affairs Healthcare Center. PARTICIPANTS Fifteen healthy adults of aged 26 to 52 years (mean age 31 years) with no gait impairment and minimal(More)
Research on the peripheral effects of COPD has focused on physiological and structural changes. However, different from muscular weakness or decreased physical activity, mechanical abnormalities of the muscular system, e.g. walking, have yet to be investigated. Our purpose was to utilize the National Health and Nutritional Examination Survey (NHANES)(More)
Previous research on the biomechanics of stair negotiation has ignored the effect of the approaching speed. We examined if initiating stair ascent with a comfortable self-selected speed can affect the lower-extremity joint moments and powers as compared to initiating stair ascent directly in front of the stairs. Healthy young adults ascended a custom-built(More)
Ascending stairs is a challenging activity of daily living for many populations. Frontal plane joint dynamics are critical to understand the mechanisms involved in stair ascension as they contribute to both propulsion and medio-lateral stability. However, previous research is limited to understanding these dynamics while initiating stair ascent from a(More)
RATIONALE Compared with control subjects, patients with chronic obstructive pulmonary disease (COPD) have an increased incidence of falls and demonstrate balance deficits and alterations in mediolateral trunk acceleration while walking. Measures of gait variability have been implicated as indicators of fall risk, fear of falling, and future falls. (More)
The purpose of this study was to examine the external work performed by individuals wearing a rocker bottom shoe compared to a standard shoe. It was hypothesized that individuals wearing a rocker bottom shoe would have changes in the amount of work over the course of contact with the ground. External work on the body’s centre of mass (BCOM) was calculated(More)
OBJECTIVE To compare the immediate effects of contralateral versus ipsilateral cane use on spatiotemporal gait parameters and peak vertical ground force in overweight or obese adults with symptomatic knee osteoarthritis (OA). DESIGN Prospective observational study. SETTING An academic tertiary Veterans Affairs Healthcare Center. PARTICIPANTS(More)