The aging process leads to adverse changes in body composition (increases in fat mass and decreases in skeletal muscle mass), declines in physical function (PF), and ultimately increased risk for disability and loss of independence. Specific components of body composition or muscle capacity (strength and power) may be useful in predicting PF; however, findings have been mixed regarding the most salient predictor of PF. The development of a conceptual model potentially aids in understanding the interrelated factors contributing to PF with the factors of interest being physical activity, body composition, and muscle capacity. This article also highlights sex differences in these domains. Finally, factors known to affect PF, such as sleep, depression, fatigue, and self-efficacy, are discussed. Development of a comprehensive conceptual model is needed to better characterize the most salient factors contributing to PF and to subsequently inform the development of interventions to reduce physical disability in older adults.
Anne O. Brady, Chad R. Straight and Ellen M. Evans
Stephen Silverman and Melinda Solmon
This paper addresses the appropriate unit of analysis in field research. We first discuss the issues related to this topic: (a) unit of measurement versus unit of analysis, (b) treatments and random assignment, (c) independence of observations, (d) moderating and control variables, and (e) correlational versus experimental research. We then present a model for determining the correct unit of analysis. In many instances, researchers should use class means or subgroup means, and this has implications for research design. In the third section, we discuss the related issues of (a) the burden of proof, (b) asking the right questions and getting the right answers, and (c) completing statistical analyses. How data are analyzed can affect the results, and researchers should consider these issues when planning their research.
Historically, Barcelona Football Club (BFC) has represented one of the pillars of Catalan identity, which earned it the slogan “more than a club.” In recent times, especially under the presidency of Joan Laporta, management has radicalized the club’s political positions by using BFC as a platform to openly promote the independence from Spain of the Catalan region. Despite the fact that most Barcelona fans in Catalonia, as well as in the rest of Spain, have much more moderate political positions, the radicalization of BFC does not appear to have eroded the relationship-building process with Barcelona fandom. This article argues that BFC as an institution still maintains a good relationship with its fans because the social, as well as individual, identity provided by allegiance to a soccer club such as BFC is ultimately more important to members and fans than the club’s political positions.
Christie L. Ward, Rudy J. Valentine and Ellen M. Evans
Adiposity, lean mass, and physical activity (PA) are known to influence physical function in older adults, although the independent influences are not completely characterized. Older adults (N = 156, M age = 68.9 ± 6.7 yr, 85 men) were assessed for body composition via dual-energy X-ray absorptiometry, PA by accelerometer, and physical function via timed up-and-go (UP&GO), 30-s chair stand, 6-min walk (6-min WALK), and Star-Excursion Balance Test. In the absence of percentage-body-fat by PA interactions (p > .05), main effects existed such that a higher percentage body fat was associated with poorer performance in UP&GO, 30-s chair stand, and 6-min WALK (p < .05). No significant main effects were found for PA and functional performance. Adiposity explains 4.6–11.4% in physical functional variance (p < .05). Preventing increases in adiposity with age may help older adults maintain functional independence.
Madeleine Vincent-Morin and Lucile Lafont
The goal of this study was to identify the relationships between the learning choices made by pupils and their personal characteristics, including cognitive style (field dependence–independence), a motivational variable (feeling of self-efficacy), and a cognitive variable (task representation). The participants were 64 twelve-year-old sixth graders from a suburban middle school in France (35 boys and 29 girls). Cognitive style or FDI was measured with the Group Embedded Figures Test, a perceptual test that requires finding a simple geometrical figure embedded in a complex geometrical one. Five learning conditions (autonomy, tutoring, verbal instruction, silent demonstration, and verbal demonstration) were then proposed in random order to the pupils. They were asked to select a learning method to solve a motor problem: a badminton service. The results indicated an absence of relationships between the choice of a learning condition and cognitive style. Three variables partially predicted the learning-condition choice: feeling of self-efficacy, task representation, and motor performance. The present results can be interpreted in the light of studies on children’s help-seeking behavior in problem-solving situations.
Tao Chen, Kenji Narazaki, Yuka Haeuchi, Sanmei Chen, Takanori Honda and Shuzo Kumagai
This cross-sectional study was performed to examine associations of objectively measured sedentary time (ST) and breaks in sedentary time (BST) with instrumental activities of daily living (IADL) disability in Japanese community-dwelling older adults.
The sample comprised 1634 older adults (mean age: 73.3 y, men: 38.4%). Sedentary behavior was measured using a triaxial accelerometer. Disability was defined as inability in at least 1 of the IADL tasks using the Tokyo Metropolitan Institute of Gerontology Index of Competence.
After adjusting for potential confounders and moderate-to-vigorous physical activity (MVPA), longer ST was significantly associated with higher likelihood of IADL disability, whereas a greater number of BST was associated with lower likelihood of IADL disability. ST and BST remained statistically significant after mutual adjustment with odds ratio of 1.30 (95% confidence interval [CI)], 1.00–1.70) and 0.80 (95% CI, 0.65–0.99), respectively.
This study first demonstrated that shorter ST and more BST were associated with lower risk of IADL disability independent of MVPA and that the association for ST was independent of BST and vice versa. These findings suggest not only total ST but also the manner in which it is accumulated may contribute to the maintenance of functional independence in older adults.
Geoffrey Whitfield, Kelley K. Pettee Gabriel and Harold W. Kohl III
Emerging evidence suggests that combined physical activity (PA) and inactivity may be more important for chronic disease risk than PA alone. A highly active yet highly sedentary population is needed to study this interaction. The present purpose is to describe the sitting habits of a group of recreational runners and determine if sitting varies with reported training duration or anticipated running velocity.
Marathon and half-marathon participants completed the Multicontext Sitting Time Questionnaire and reported peak training duration, anticipated finishing time, and demographic information. Sitting time was described across 5 contexts for workdays and nonworkdays. Total sitting time was analyzed by tertiles of training duration and anticipated event running velocity.
218 participants took part in this study. Median reported training time was 6.5 hours per week. Median total sitting time was higher on workdays than nonworkdays (645 and 480 minutes, respectively, P < .0001). Total sitting time was not associated with training duration or anticipated event running velocity.
These results suggest that recreational distance runners are simultaneously highly sedentary and highly active, supporting independence of sedentary behaviors and moderate- to vigorous-intensity PA. This population may provide the characteristics needed to study the joint effects of active and sedentary behaviors on health outcomes.
Luis Columna, Margarita Fernández-Vivó, Lauren Lieberman and Katrina Arndt
Nationwide research indicates that children with visual impairment have limited participation in recreational and sport activities than their peers. This is due in part to the lack of recreational opportunities and facilities, as well as a lack of awareness by parents of how and where their children can participate. The purpose of the current study was to explore the experiences of Latino families of children with visual impairments living in Guatemala regarding physical recreation. Participants were Latino parents (N = 13) who have children with visual impairments recruited from a sport camp.
Qualitative data were gathered through one-on-one interviews that were transcribed and analyzed through a constant comparative analysis.
Participating Latino families who resided in Guatemala City participated at least once a month in low budget recreational activities with their children with visual impairments. Activities were mostly done in local surroundings and led mainly by their mother. Benefits identified by the participants related to relaxation, socialization, and sense of independence, with minimal mention of health related benefits.
There is a need to disseminate information to the Latino community with children with visual impairments regarding the multiple benefits that arise from being involved in recreational physical activities.
Cyril Burdet and Patrice Rougier
To question the relation between uni- and bipedal postural skills, 21 subjects were required to stand on a force platform through uni- and bipedal conditions. These two protocols are commonly used paradigms to assess the balance capacities of healthy and disabled patients. The recorded displacements of the center of pressure (CP) were decomposed along mediolateral and anteroposterior axes and assessed through variance positions and parameters obtained from fractional Brownian motion (fBm) modeling to determine the nature and the spatiotemporal organization of the successive controlling mechanisms. The variances underline the relative independence of the two tasks. Nevertheless, as highlighted by the fBm framework, postural correction is initiated for the unipedal stance after shorter time delays and longer covered distances. When compared to bipedal standing, one of the main characteristics of unipedal standing is to induce better-controlled CP trajectories, as deduced from the scaling regimes computed from the fBm modeling. Lastly, the control of the CP trajectories during the shortest time intervals along the anteroposterior axis appears identical for both uni- and bipedal conditions. Unipedal and bipedal standing controls should thus be viewed as two complementary tasks, each providing specific and complementary insights into the postural control organization.
This study examines the historical significance of Jang Gwon’s activities in the sport promotion carried out by Korea’s YMCA. At its birth, the Korean YMCA’s sport promotion was closely linked with the Korean nationalist movement under Japanese colonial rule, and this link was most evident around 1920, when Jang Gwon worked as a judo master. Citing the Sokol movement in Czechoslovakia, Jang Gwon took initiatives to enlighten Korean people’s consciousness and popularize sports, including judo and basketball, across the country through the Korean YMCA’s sport promotion. In particular, Jang Gwon introduced modern judo—formally known as Gangdogwan (Kodokan judo), initiated by Jigoro Kano—in Korea and took initiatives to establish the Korean Basketball Association and the Korean Basketball Referee Association. Through the Korean YMCA’s sport promotion, Jang Gwon motivated the Korean people to aspire to liberation and independence from Japanese colonial rule. Moreover, amid the prevailing social climate, in which physical activities were discouraged due to the influence of Neo-Confucianism, he provided a paradigm shift that called for “sport for all,” which enabled the modernization of sports and physical education in Korea.