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Thomas M. Maden-Wilkinson, Jamie S. McPhee, David A. Jones and Hans Degens

To investigate reasons for the age-related reduction in physical function, we determined the relationships between muscle size, strength, and power with 6-min walk distance (6MWD) and timed up-and-go performance in 49 young (23 ± 3.1 years) and 66 healthy, mobile older adults (72 ± 5 years). While muscle mass, determined by DXA and MRI, did not correlate with performance in the older adults, power per body mass, determined from a countermovement jump, did correlate. The 40% lower jumping power observed in older adults (p < .05) was due to a lower take-off velocity, which explained 34% and 42% of the variance in 6MWD in older women and men, respectively (p < .01). The lower velocity was partly attributable to the higher body mass to maximal force ratio, but most was due to a lower intrinsic muscle speed. While changes in muscle function explain part of the age-related reduction in functional performance, ~60% of the deficit remains to be explained.

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Debra J. Rose, C. Jessie Jones and Nicole Lucchese

The purpose of this study was to determine whether performance on the 8-ft up-and-go test (UG) could discriminate between older adult fallers (n = 71) and nonfallers (n = 63) and whether it would be as sensitive and specific a predictor of falls as the timed up-and-go test (TUG). Performance on the UG was significantly different between the recurrent faller and nonfaller groups (p < .01), as was performance on the TUG (p < .001). Older adults who required 8.5 s or longer to complete the UG were classified as fallers, with an overall prediction rate of 82%. The specificity of the test was 86% and the sensitivity was 78%. Conversely, the overall prediction rate for older adults who completed the TUG in 10 s or longer was 80%. The specificity of the TUG was 86% and the sensitivity was 71%.

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Simona Bar-Haim, Ronit Aviram, Anat Shkedy Rabani, Akram Amro, Ibtisam Nammourah, Muhammed Al-Jarrah, Yoav Raanan, Jack A. Loeppky and Netta Harries

and motor function in adolescents and young adults with CP, and then measure and correlate the changes in HPA and motor function induced by exercise interventions in the same population. Mobility measures and 4-day averages of HPA by accelerometer were obtained before (T1) and after (T2) 4-month

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Rienk M.A. van der Slikke, Daan J.J. Bregman, Monique A.M. Berger, Annemarie M.H. de Witte and Dirk-Jan (H.) E.J. Veeger

unobstructive way. 8 This method quantifies the wheelchair mobility performance, that is, the ability to maneuver the wheelchair. This measure of the wheelchair–athlete combination is one of the most important performance aspects 9 contributing to overall game performance as described by Byrnes et al. 10 In

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Margaret Delaney, Meghan Warren, Brian Kinslow, Hendrik de Heer and Kathleen Ganley

Health Promotion, 2008b ). Although it is known that a relationship exists between physical activity and disability, the current study aims to quantify this relationship using the U.S. guidelines and self-reported disability in mobility tasks, ADLs, and social participation. Therefore, the purpose of

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Andrew F. Clark, Joannah Campbell, Patricia Tucker, Piotr Wilk and Jason A. Gilliland

accessibility, including mobility options (ie, geographic and economic), spatial awareness (ie, geographic and information), and opportunity awareness (ie, information and economic). Figure 1 —Theoretical outline of the physical activity accessibility model. Information accessibility is defined as the amount

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Kornelius Kraus, Elisabeth Kraus, Boris Gojanovic and Francois Fourchet

, although sophisticated devices, such as inclinometers, are available. In team sports or military cohorts, practitioners may apply test batteries that incorporate flexibility or mobility tasks to evaluate individual joint ROM or muscle length, and time availability is one of the key limiting factors. 4 – 6

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Kirsi E. Keskinen, Merja Rantakokko, Kimmo Suomi, Taina Rantanen and Erja Portegijs

factors underlying older adults’ perceptions of environmental outdoor mobility facilitators and the influence of these on their PA. Categorizing neighborhoods into the city center, subcenters, and dense and disperse areas outside centers could also enhance the value of research results for urban planning

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Samantha M. Ross, Ellen Smit, Joonkoo Yun, Kathleen Bogart, Bridget Hatfield and Samuel W. Logan

functional limitations within cognition, mobility, sensory, or self-care domains. Methods Data Source This study is a secondary, cross-sectional analysis of publicly available data drawn from the most current NSCH cycles, 2016 and 2017. NSCH is a national survey sponsored by the Maternal and Child Health

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Jieling Chen, Emily Joy Nicklett, Yaping He and Vivian W.Q. Lou

. However, the vast majority of studies examining correlates of physical activity have focused on patients with end-stage CKD; few studies looked at individuals who are not in end stage. As patients with earlier stage CKD may experience fewer complications, less symptom burden, less physical mobility