50 research outputs found

    The top panel shows the time series of acceleration (green—mediolateral; red—anterior-posterior; and blue—vertical) and angular velocity (blue—pitch; green—yaw; and red—roll) over the main phases of the STS cycles.

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    <p>The ↑ arrows indicate standing up (SiSt) and the ↓ arrows indicate sitting down (StSi). The grey vertical bars demarcate the standing and sitting episodes. In the bottom panel the first complete STS cycle is depicted and magnified.</p

    Associations between STS performance, dichotomized into fast and slow by a median split, with daily physical activity.

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    <p>Mean sitting period durations per day are expressed in seconds. Mean standing duration per day are expressed in minutes. Locomotion periods are expressed in mean number per day.</p

    Anterior-posterior acceleration signal for two subjects.

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    <p>The ↑ arrows indicate standing up (SiSt) and the ↓ arrows indicate sitting down (StSi). The dark grey bars mark the standing duration, while the light grey bars mark the sitting duration. The upper panel shows a fast participant (9 seconds) with very short and regular standing and sitting durations. The lower panel shows a slow participant (33 seconds) with very long and less regular standing and sitting durations.</p

    Forest plots of the association between blood pressure and A) reported impaired standing balance and B) history of falls.

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    <p>Blood pressure measures were determined with continuous measurements in subgroup who underwent additional continuous blood pressure measurements (n = 58). Orthostatic hypotension: 0  =  absent, 1  =  present; defined as a decrease in systolic blood pressure of ≥ 40 mmHg or in diastolic blood pressure of ≥ 20 mmHg during 15 seconds after postural change or a decrease in systolic blood pressure of ≥ 20 mmHg or diastolic blood pressure of ≥ 10 mmHg between 15 and 180 seconds after postural change. Reported impaired balance: 0  =  never or sometimes, 1  =  regularly or always. History of falls: 0  =  no falls, 1  =  falls. Results are presented in odds ratios per 10 mmHg blood pressure decrease and 95% confidence intervals with adjustments for age and sex. No overlap with 1.0 indicates a significant difference.</p
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