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Although lower limb strength becomes asymmetrical with age, past studies of aging effects on gait biomechanics have usually analyzed only one limb. This experiment measured how aging and treadmill surface influenced both dominant and nondominant step parameters in older (mean 74.0 y) and young participants (mean 21.9 y). Step-cycle parameters were obtained(More)
Attention demands of walking were determined in six male and six female young adults (mean 26.3 yr) and 12 gender-matched healthy, active older adults (mean 71.1 yr) using a dual task procedure with a reaction time (RT) secondary task. In three conditions an auditory stimulus, a visual stimulus and both stimuli (auditory/visual) were presented. Relative to(More)
One defining characteristic of skilled motor performance is the ability to complete the task with minimum energy expenditure. This experiment was designed to examine practice effects on coordination and control, metabolic energy expenditure, and muscle activation. Participants rowed an ergometer at 100 W for ten 16-min sessions. Oxygen consumption and(More)
BACKGROUND Falls in older individuals are a major public health issue because of the financial cost of surgery and re habilitation and the human cost of associated pain and disability. Older individuals are most likely to fall when negotiating an obstacle or obstruction during locomotion. This research was aimed at investigating lower limb motion while a(More)
In 19 elite schoolboy rowers, the relationships between anthropometric characteristics, metabolic parameters, strength variables and 2000-m rowing ergometer performance time were analysed to test the hypothesis that a combination of these variables would predict performance better than either individual variables or one category of variables. Anthropometric(More)
OBJECTIVE To compare spatial and temporal measures during lead limb obstacle crossing between subjects with stroke and healthy subjects. DESIGN Experimental, observational, with matched controls. SETTING Geriatric rehabilitation unit in a tertiary referral hospital. PARTICIPANTS Distance data were available for 19 subjects with stroke and 19(More)
OBJECTIVE To study the ability of subjects with stroke to successfully step over an obstacle during ambulation. SETTING A geriatric rehabilitation unit in a tertiary referral hospital. SUBJECTS Twenty-four inpatients with stroke (median time poststroke 27 days, interquartile range 21 to 44.5 days) able to walk 10 m unassisted without walking aids; also,(More)
Human gait is precisely and continuously adapted in order to negotiate obstacles safely and without excessive modulations to lower limb trajectories. To investigate obstacle clearance, unimpaired healthy adult subjects (6 male and 6 female) were videotaped stepping over an obstacle adjusted to IO%, 25%. and 40% of leg length. Lead foot clearance was(More)
Methods for determining the degree of similarity between relative motion plots are examined and computational methods outlined. Hypothetical examples are provided to simply illustrate the function of selected indices of pattern shape, size, and orientation. Methods of using a composite of these measures to assess asymmetry, abnormality, or refinements in(More)
The study of human gait has expanded and diversified to the extent that it is now possible to identify a substantive literature concerning a variety of gait tasks, such as gait initiation [Halliday SE, Winter DA, Frank JS, Patla AE, Prince F. The initiation of gait in young, elderly, and Parkinson's disease subjects. Gait Posture 1998;8:8-14; Mickelborough(More)