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Emily Borgundvaag, Michael McIsaac, Michael M. Borghese and Ian Janssen

Moderate to vigorous physical activity (MVPA) benefits a child’s health. 1 Accelerometers are commonly used to objectively measure how much MVPA children accumulate. Issues inherent to accelerometers may lead to biased MVPA estimates. 2 , 3 One of these issues is nonwear time. Nonwear time occurs

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Sara Knaeps, Stijn De Baere, Jan Bourgois, Evelien Mertens, Ruben Charlier and Johan Lefevre

amount of sedentary time with moderate to vigorous physical activity (MVPA). 8 – 11 Results from previous research clearly state that substituting sedentary time with MVPA will lead to lower clustered cardiometabolic health risk than substituting with LPA or sleep. Nonetheless, some uncertainty remains

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Lena Zimmo, Fuad Almudahka, Izzeldin Ibrahim, Mohamed G. Al-kuwari and Abdulaziz Farooq

than those of Grade 4 girls. Figure 1 Moderate to vigorous physical activity (MVPA) minutes/day during physical education (PE), recess, and class time. Table  2 shows the percentage of time children in the study spent in MVPA activity during PE, recess, classroom, and overall school time. Girls spent

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Quinn Malone, Steven Passmore and Michele Maiers

points has been shown to significantly vary the amount of moderate-to-vigorous physical activity (MVPA) reported in obese children ( Banda et al., 2016 ), adults ( Watson, Carlson, Carroll, & Fulton, 2013 ), and those with coronary artery disease ( Prince et al., 2015 ). When the same set of data is

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Gerson Luis de Moraes Ferrari, Victor Matsudo, Tiago V. Barreira, Catrine Tudor-Locke, Peter T. Katzmarzyk and Mauro Fisberg

Background:

Few studies have used ecological models to study multiple levels of association with objectively measured moderate-to-vigorous physical activity (MVPA) in young children from middle-income countries. The purpose of this study was to examine potential correlates of objectively measured MVPA in Brazilian children.

Methods:

The sample consisted of 328 children. An Actigraph GT3X+ accelerometer was used to monitor MVPA over 7 days. Body mass index and body fat percentage were measured using a bioelectrical impedance scale. Questionnaires completed by the children, their parents, and school personnel queried individual, family and home, and school-level environmental correlates.

Results:

Children averaged 59.3 min/d in MVPA (44.5% met MVPA guidelines), and 51.8% were overweight/obese. For boys and girls combined, significant correlates (P < .05) of MVPA were waist circumference (β = –.007), travel mode to school (β = .140), maternal employment status (β = –.119) and TV in bedroom (β –.107). In boys, significant correlates of MVPA were waist circumference (β = –.011), travel mode to school (β = .133), and maternal employment status (β = –.195). In girls, the only significant correlate of MVPA was travel mode to school (β = .143).

Conclusions:

Several factors were identified as correlates of MVPA in Brazilian children; however, only travel mode to school was common for both boys and girls.

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Evelin Lätt, Jarek Mäestu and Jaak Jürimäe

risk factors in children and adolescent might be appropriate. In contrast, increasing the levels of physical activity, especially moderate-to-vigorous physical activity (MVPA) has a beneficial effect on elevated cardiometabolic risk factors. 6 , 7 To date, few studies have investigated how different

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Matthew Pearce, David H. Saunders, Peter Allison and Anthony P. Turner

The UK Government advises that children and young people aged 5–18 years should participate in structured and unstructured activities throughout the day to achieve the recommended 60 daily minutes of moderate to vigorous physical activity (MVPA). Physical activity of this intensity stimulates the

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Allana G.W. LeBlanc and Ian Janssen

We examined differences between objective (accelerometer) and subjective (self-report) measures of moderate-to-vigorous physical activity (MVPA) in youth. Participants included 2761 youth aged 12–19 years. Within each sex and race group, objective and self-reported measures of MVPA were poorly correlated (R 2 = .01–.10). Self-reported MVPA values were higher than objective values (median: 42.4 vs. 15.0 min/d). 65.4% of participants over-reported their MVPA by 35 min/d. The difference between self-reported and objective measures was not influenced by sex, age, or race. There was, however, a systematic difference such that inactive participants over-reported their MVPA to the greatest extent.

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Joey C. Eisenmann, R. Todd Bartee and Krystal D. Damori

Purpose:

The purposes of this study were (a) to describe the prevalence of participation in moderate to vigorous physical activity (MVPA) and overweight and obesity, and (b) to examine the associations between physical activity and weight status in a sample of university students from a rural university.

Methods:

Data from a representative sample of 773 (361 women, 412 men) students participating in the National College Health Assessment Survey were examined. MVPA and height and body mass were self-reported. The body-mass index (BMI) was derived and used to classify subjects as normal, overweight, or obese.

Results:

Approximately 20% of students were inactive (0 d/wk), and 23% met the recommended amount of MVPA (≥5 d/wk). Prevalence of overweight and obesity was, respectively, 35.7% and 8.5% in men and, respectively, 15.6% and 8.2% in women. Analysis of variance revealed the mean BMI was not significantly different across levels of MVPA. Odds ratios showed higher levels of MVPA were significantly associated with lower risk of obesity in men but not women.

Conclusion:

A large percentage of subjects are inactive or insufficiently active, and self-reported moderate to vigorous physical activity is significantly related to risk of obesity in men. Future studies should measure habitual physical activity or energy expenditure and body composition. Additional factors affecting obesity, such as television viewing and other sedentary behaviors, dietary intake, and heritability, should also be considered.

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Livia Victorino Souza, Franciele De Meneck, Vanessa Oliveira, Elisa Mieko Higa, Eliana Hiromi Akamine and Maria do Carmo Franco

is to test the hypothesis that healthy children who participate in 10 weeks of moderate to vigorous physical activity (MVPA) program will improve their EPC number and function. Furthermore, we will assess the effects of physical activity program on circulating levels of NO and VEGF-A. Methods