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Acquiring a stable estimate of physical activity in adults with visual impairment

机译：对患有视力障碍的成年人进行体育锻炼的稳定估计

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As a first step toward the development of adapted physical activity (PA) programs for adults with visual impairment (VI), the purpose of this study was to determine the time frame needed to reliably estimate weekly PA in adults with VI. Thirty-three adults with VI completed 7 days of pedometer-based PA assessment. Generalizability theory analyses were conducted to quantify sources of variance within the PA estimate and determine the appropriate number of days of PA monitoring needed for the total sample and for participants with mild-to-moderate and severe VI. A single-facet, crossed design was employed including participants and days. Participants and days correspondingly accounted for 33-55% and 0-3% of the total variance in PA. While a reliable account of PA was obtained for the total sample over a 6-day period, shorter (4-day) and longer (9-day) periods were required for persons with mild-to-moderate and severe VI, respectively.
机译：作为开发针对视力障碍（VI）成年人的适应性体育锻炼（PA）计划的第一步，本研究的目的是确定可靠估计VI成年人的每周PA所需的时间范围。 33名VI成年人完成了基于计步器的PA评估，为期7天。进行了可归纳性理论分析，以量化PA估计值内的方差源，并确定总样本以及轻度至中度和重度VI参与者所需的PA监测的适当天数。采用单面交叉设计，包括参与者和工作日。参与者和天数分别占PA总差异的33-55％和0-3％。虽然可以在6天的时间内获得总样本的PA的可靠信息，但轻度至中度和重度VI的患者分别需要更短的时间（4天）和更长的时间（9天）。

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