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Jaehun Jung, Willie Leung, Bridgette Marie Schram and Joonkoo Yun

young people with and without long-term illness and/or disabilities are equally physically active. Because of these inconclusive results, researchers have expressed the need for additional studies to improve the current limitations and evaluate physical activity levels of individuals with disabilities

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Amy R. Barchek, Shelby E. Baez, Matthew C. Hoch and Johanna M. Hoch

physical activity have been used to determine physical activity levels in patients with a history of musculoskeletal injury. These findings are pertinent to patient care, as an understanding of how these injuries may affect a person’s physical activity can help clinicians educate their patients on the

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Kazuhiro Harada, Sangyoon Lee, Sungchul Lee, Seongryu Bae, Yuya Anan, Kenji Harada and Hiroyuki Shimada

, physical activity level is lower in older adults ( Inoue et al., 2011 ). Thus, promotions of physical activity are important to reduce the increase of the population with dementia ( Barnes & Yaffe, 2011 ). Increasing the expectation about the link between physical activities and reduction in dementia risk

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Guy C. Le Masurier, Aaron Beighle, Charles B. Corbin, Paul W. Darst, Charles Morgan, Robert P. Pangrazi, Bridgette Wilde and Susan D. Vincent

Background:

The purpose of this study was to describe the pedometer-determined physical activity levels of American youth.

Methods:

A secondary analysis of six existing data sets including 1839 (1046 females, 793 males; ages 6 to 18) school-aged, predominantly white subjects from the southwest US. Grade clusters for elementary (grades 1 to 3), upper elementary (grades 4 to 6), middle school (grades 7 to 9), and high school (grades 10 to 12) were created for statistical analysis.

Results:

Males in grades 1 to 3 and 4 to 6 accumulated significantly more steps/d (13,110 ± 2870 and 13,631 ± 3463, respectively; P < 0.001) than males in grades 7 to 9 and 10 to 12 (11,082 ± 3437 and 10,828 ± 3241). Females in grades 1 to 3 and 4 to 6 accumulated significantly more steps/d (11,120 ± 2553 and 11,125 ± 2923; P < 0.001) than females in grades 7 to 9 and 10 to 12 (10,080 ± 2990 and 9706 ± 3051).

Conclusions:

Results are consistent with those reported for other objective assessments of youth activity indicating that males are typically more active than females and physical activity is less prevalent among secondary school youth than those in elementary school. Pedometer-determined physical activity levels of youth, including secondary school youth, are higher than reported for adult populations.

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Claudia O. Alberico, J. Aaron Hipp and Rodrigo S. Reis

installing FZ in parks increased frequency of use and levels of physical activities in those locations, as well as the weekly frequency of physical activities among users of the parks. Similarly, in Australia, Cranney et al 13 found that installing FZ in parks increased physical activity levels of park

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Hiroyuki Sagayama, Makiko Toguchi, Jun Yasukata, Kazunari Yonaha, Yasuki Higaki and Hiroaki Tanaka

expenditure (TEE) and physical activity level (PAL) accurately using a gold standard, such as the doubly labeled water (DLW) method ( Schoeller et al., 1986 ). An earlier study estimated that TEE was about 19.3 MJ/day (4,609 kcal/day) for offshore racing over 13 days using DLW methods measurements ( Branth et

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Priscilla G. MacRae, John F. Schnelle, Sandra F. Simmons and Joseph G. Ouslander

The purpose of this study was to describe the physical activity levels of ambulatory nursing home residents (N = 95) and identify factors that predicted these activity levels. The residents’ physical activity levels (standing, walking, and wheelchair propulsion), as measured by time-sampled observations and Caltrac motion sensors, indicated that restraint use was the major predictor of low physical activity. Both the physically restrained and the physically unrestrained groups, however, were inactive, with 93.8% and 83.5% of the observations, respectively, representing either lying or sitting. In the unrestrained group, scores measuring the resident’s fall risk, self-selected walking speed, upper and lower body strength, and body mass index were significant predictors of physical activity level. In the restrained group, scores measuring the resident’s fall risk and upper body strength were significant predictors of activity level.

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Joey C. Eisenmann, P.T. Katzmarzyk and Mark S. Tremblay

Background:

In recent years, it has been noted that children and youth are physically inactive, and physical activity levels have declined over the past decades. However, few empirical studies have been conducted to test this assumption. Therefore, the purpose of this study was to examine leisure-time physical activity levels among Canadian adolescents 12–19 years of age.

Methods:

Age, sex, geographic, and temporal trends in leisure-time physical activity energy expenditure (AEE) were examined using data from 5 national surveys conducted between 1981 and 1998. AEE was calculated from participants’ questionnaire responses on physical activity participation. General linear models were used to examine the differences in AEE across survey years, geographic regions, sexes, and age groups.

Results:

Males and 12–14-year-olds displayed greater AEE than females and 15–19-year-olds, respectively, and AEE was lowest in Quebec and highest in the West. AEE increased between the 1981 and 1988 surveys and has since remained relatively stable. The prevalence of subjects meeting the 12.6 kJ · kg−1 · d−1 (3 kcal · kg−1 · d−1) recommendation increased from 1981 to 1988. Since 1988, the prevalence of those meeting the 12.6 kJ · kg−1 · d−1 recommendation has decreased in 12–14 year old boys and remained relatively stable in the other groups. In 1998, about 45% of males and 35% of females met the 12.6 kJ · kg−1 · d−1 recommendation. In 1998, about 20% of 12–19-year-old males and 12–14-year-old females met the 25.1 kJ · kg−1 · d−1 (6 kcal · kg−1 · d−1) recommendation, while about 10% of 15–19-year-old females met this recommendation. In females, the prevalence of those meeting the 25.1 kJ · kg−1 · d−1 recommendation has remained relatively stable (about 10%) since 1981 except for an increase between 1996 and 1998 in 12–14-year-old girls. In males, a similar pattern, but not as dramatic, of that observed for the prevalence of those meeting the 12.6 kJ · kg−1 · d−1 emerged—that is, an increase between 1981 and 1988 and then a decrease in 12–14-year-old boys and a stable pattern in 15–19-year-old boys.

Conclusion:

Although self-reported leisure-time physical activity appears to have increased since 1981, a majority of Canadian adolescents do not meet current recommendations for physical activity.

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Jennifer R. O’Neill, Russell R. Pate and Michael W. Beets

Background:

The aims of this study were to describe the physical activity levels of girls during dance classes and to identify factors associated with moderate-to-vigorous physical activity (MVPA) in those classes.

Methods:

Participants were 137 girls (11 to 18 years-old) enrolled in ballet, jazz, or tap dance classes from 11 dance studios. Participants wore an accelerometer during the selected dance class on 2 separate days. Factors hypothesized to be associated with MVPA were dance style, instructional level, instructor’s experience, percent of class time spent in choreography, and participants’ age, race/ethnicity, BMI-for-age percentile, and years of dance training. Data were analyzed using generalized linear mixed models.

Results:

Girls engaged in 9.8 minutes of MVPA, 6.0 minutes of moderate, 3.8 minutes of vigorous, 39.3 minutes of light, and 10.9 minutes of sedentary behavior per hour of dance class participation. Jazz/tap classes provided more MVPA than ballet classes, and intermediate level classes provided more MVPA than advanced level classes. Girls with more dance training obtained more MVPA than girls with less dance training.

Conclusion:

Dance classes provide valuable opportunities for adolescent girls to be physically active.

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Gordon R. Chalmers and Kathleen M. Knutzen

The aim of this study was to determine whether elderly and young adults with similar physical activity levels have similar soleus H-wave maximum/M-wave maximum ratios (H-reflex size) and to determine the relationship between H-reflex size and physical activity level. H-reflex size and physical activity levels were measured in 18 elderly (71 ± 5.7 years) and 20 young (24 ± 4.2) participants. The physical activity levels of the 2 groups were not significantly different. The elderly group had smaller H-rellexes than the young group (elderly. 36% ± 27%; young, 59% ± 17%; p < .05), but the effect of age on H-reflex size was only moderate (omega squared = .19, effect size = .30). There was a weak tendency for higher levels of physical activity to be associated with larger H reflexes (r = .38, p < .05). The findings indicate that soleus H-reflex size is not strongly associated with age or physical activity level.