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In this article, we examine changes in life expectancy free of disability using longitudinal data collected from 1984 through 2000 from two cohorts who composed the Longitudinal Studies of Aging I and II. Life expectancies with and without ADL and/or IADL disability are calculated using a Markov-based multistate life table approach. At age 70, disability-free life expectancy increased over a 10-year period by 0.6 of a year in the later cohort, which was the same as the increase in total life expectancy, both increases marginally statistically significant. The average length of expected life with IADL and ADL disability did not change. Changes in disability-free life expectancy resulted from decreases in disability incidence and increases in the incidence of recovery from disability across the two survey cohorts. Age-specific mortality among the ADL disabled declined significantly in the later cohort after age 80. Mortality for the IADL disabled and the nondisabled did not change significantly. Those with ADL disability at age 70 experienced substantial increases in both total life expectancy and disability-free life expectancy. These results indicate the importance of efforts both to prevent and delay disability and to promote recovery from disability for increasing life expectancy without disability. Results also indicate that while reductions in incidence and increases in recovery work to decrease population prevalence of disability, declining mortality among the disabled has been a force toward increasing disability prevalence. [ABSTRACT FROM AUTHOR]

Background and Purpose Although a criterion reference of 10,000 steps per day is recommended for health benefits, a literature search yielded no normative standard for daily steps. Therefore, a meta-analysis was used in estimate the number of pedometer-documented steps that adults take daily. Methods Studies were retrieved using electronic databases and cross-referencing from retrieved studies. A random-effects model and 95% confidence intervals (CIs) were used tor all analyses of daily step data. Results Seventy-one outcomes, representing 6,199 subjects from 42 studies, met the inclusion criteria. Excluding Amish subjects, the daily step count averaged 9,448 (95% CI=8,899-9,996) and was greater in subjects younger than 65 years of age (mean=9,797, 95% CI=9,216-10,377) compared with subjects 65 years of age or older (mean=6,565, 95% CI=4,897-8,233). Discussion and Conclusion This study provides an estimate of the number of daily steps taken by adults. The number is less than the recommended 10,000 steps per day and is especially low in adults 65 years of age or older. [ABSTRACT FROM AUTHOR]