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David A. Rowe and Matthew T. Mahar

Background:

The purpose of the study was to evaluate race-specific FITNESSGRAM® body mass index (BMI) standards in comparison to the recommended standards, i.e., percent fat (%BF) ≥25 in boys and %BF ≥32 in girls.

Methods:

BMI and %BF were estimated in 1,968 Black and White children ages 6-14 years, using methods similar to those used to develop the current FITNESSGRAM standards. Multiple regression was employed to develop age-, sex-, and race-specific BMI standards. Percent agreement and modified kappa (κq) were used to evaluate agreement with the %BF standards, and sensitivity and specificity were used to evaluate classification accuracy.

Results:

Race significantly (p < .05) and meaningfully (β = 2.3% fat) added to the relationship between BMI and %BF. Agreement of the race-specific BMI standards with %BF standards was moderate to high (κq = .73–.88), and classification accuracy improved on the current FITNESSGRAM BMI standards.

Conclusions:

Race-specific BMI standards appear to be a more accurate representation of unhealthy %BF levels than the current FITNESSGRAM BMI standards.

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Trent A. Petrie, Christy Greenleaf, Jennifer E. Carter and Justine J. Reel

Few studies have been conducted examining male athletes and eating disorders, even though the sport environment may increase their risk. Thus, little information exists regarding the relationship of putative risk factors to eating disorders in this group. To address this issue, we examined the relationship of eating disorder classification to the risk factors of body image concerns (including drive for muscularity), negative affect, weight pressures, and disordered eating behaviors. Male college athletes (N= 199) from three different NCAA Division I universities participated. Only two athletes were classified with an eating disorder, though 33 (16.6%) and 164 (82.4%), respectively, were categorized as symptomatic and asymptomatic. Multivariate analyses revealed that eating disorder classification was unrelated to the majority of the risk factors, although the eating disorder group (i.e., clinical and symptomatic) did report greater fear of becoming fat, more weight pressures from TV and from magazines, and higher levels of stress than the asymptomatic athletes. In addition, the eating disorder group had higher scores on the Bulimia Test-Revised (Thelen, Mintz, & Vander Wal, 1996), which validated the Questionnaire for Eating Disorder Diagnosis (Mintz, O’Halloran, Mulholland, & Schneider, 1997) as a measure of eating disorders with male athletes. These findings suggest that variables that have been supported as risk factors among women in general, and female athletes in particular, may not apply as strongly, or at all, to male athletes.

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Anne L. Adolph, Maurice R. Puyau, Firoz A. Vohra, Theresa A. Nicklas, Issa F. Zakeri and Nancy F. Butte

Purpose:

Given the unique physical activity (PA) patterns of preschoolers, wearable electronic devices for quantitative assessment of physical activity require validation in this population. Study objective was to validate uniaxial and triaxial accelerometers in preschoolers.

Methods:

Room calorimetry was performed over 3 hours in 64 preschoolers, wearing Actical, Actiheart, and RT3 accelerometers during play, slow, moderate, and fast translocation. Based on activity energy expenditure (AEE) and accelerometer counts, optimal thresholds for PA levels were determined by piecewise linear regression and discrimination boundary analysis.

Results:

Established HR cutoffs in preschoolers for sedentary/light, light/moderate and moderate/vigorous levels were used to define AEE (0.015, 0.054, 0.076 kcal·kg−1·min−1) and PA ratio (PAR; 1.6, 2.9, 3.6) thresholds, and accelerometer thresholds. True positive predictive rates were 77%, 75%, and 76% for sedentary; 63%, 61%, and 65% for light; 34%, 52%, and 49% for moderate; 46%, 46%, and 49% for vigorous levels. Due to low positive predictive rates, we combined moderate and vigorous PA. Classification accuracy was improved overall and for the combined moderate-to-vigorous PA level (69%, 82%, 79%) for Actical, Actiheart, and RT3, respectively.

Conclusion:

Uniaxial and triaxial accelerometers are acceptable devices with similar classification accuracy for sedentary, light, and moderate-to-vigorous levels of PA in preschoolers.

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Laura Spivey Kabiri, Katy Mitchell, Wayne Brewer and Alexis Ortiz

Almost 2 million American children are homeschooled but no information is currently available regarding motor skill proficiency within this population. The purpose of this research was to describe motor skill proficiency among homeschooled children and assess differences in homeschooled subgroups. This crosssectional study screened 73 homeschooled children aged 5–8 years for overall motor skill proficiency using the Bruininks-Oseretsky Test of Motor Proficiency, Second Edition, Short Form (BOT-2 SF). Independent t tests examined differences in motor skill proficiency within the homeschooled population. Mann-Whitney U tests examined differences in motor skill proficiency classification within significantly different subgroups. Homeschooled children demonstrated average motor proficiency. Significantly different motor proficiency was seen among homeschooled children participating in 3 or more hours of organized sports per week, t(71) = 2.805, p = .006, 95% CI = 1.77, 10.49, and whose primary caregiver was employed versus unemployed, t(71) = –3.875, p < .001, 95% CI = –13.29, –4.26. Mann-Whitney U tests revealed significantly different motor skill proficiency classification in these same subgroups. Overall, homeschooling showed no detrimental effect on motor skill proficiency. Participation in 3 or more hours of organized sports per week or having an unemployed primary caregiver may improve motor skill proficiency among this population.

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Kirk Wakefield

Passion drives sport consumption, but we lack valid relevant measures of passion. The results of two studies provide evidence of a reliable and valid multiple-item passion scale that may be used in the study of sports-related consumption behavior. In Study 1 a multi-item fan passion scale was compared with established social identification fan classification scales to provide evidence of discriminant and predictive validity. Because the passion scale outperformed other relevant fan classification measures, in Study 2 the fan passion scale was compared with current single-item measurement practices employed by National Football League and Major League Baseball teams, and some academics, to classify fans. Findings confirmed the veracity of the multi-item passion measure over categorical and interval fan avidity measures used by leagues and syndicated research providers. Taken together, the studies validate an accurate measure of fan passion that may be used to segment and predict fan behaviors, including consumption of traditional media (television, radio, news, and the team’s website) and consumption of the team’s official social media outlets.

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Michael W. Beets, Guy C. Le Masurier, Aaron Beighle, David A. Rowe, Charles F. Morgan, Jack Rutherford, Michael Wright, Paul Darst and Robert Pangrazi

Background:

The purpose of this study was to cross-validate international BMI-referenced steps/d cut points for US girls (12,000 steps/d) and boys (15,000 steps/d) 6 to 12 years of age.

Methods:

Secondary pedometer-determined physical activity data from US children (N = 1067; 633 girls and 434 boys, 6 to 12 years) were analyzed. Using international BMI classifications, cross-validation of the 12,000 and 15,000 steps/d cut points was examined by the classification precision, sensitivity, and specificity for each age–sex stratum.

Results:

For girls (boys) 6 to 12 years, the 12,000 (15,000) steps/d cut points correctly classified 42% to 60% (38% to 67%) as meeting (achieved steps/d cut point and healthy weight) and failing (did not achieve steps/d cut point and overweight). Sensitivity ranged from 55% to 85% (64% to 100%); specificity ranged from 23% to 62% (19% to 50%).

Conclusion:

The utility of pedometer steps/d cut points was minimal in this sample given their inability to differentiate among children who failed to achieve the recommended steps/d and exhibited an unhealthy weight. Caution, therefore, should be used in applying previous steps/d cut points to US children.

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Stephen J. Rossi, Thomas W. Buford, Douglas B. Smith, Robin Kennel, Erin E. Haff and G. Gregory Haff

Purpose:

The primary purpose of this study was to simultaneously analyze both ends of the barbell with 19 weightlifters (age 18.0 ± 3.2 years, body mass 84.0 ± 14.2 kg, height 167.3 ± 8.7 cm) participating in a weightlifting competition to determine whether there were asymmetries in barbell kinematics and kinetics between the right and left sides of the barbell. The second purpose was to compare barbell-trajectory classification of the snatch and clean lifts between the right and left sides of the barbell.

Methods:

Barbell kinematic and kinetic data were collected and analyzed with 2 VS-120 weightlifting-analysis systems (Lipman Electronic Engineering Ltd, Ramat Hahayal, Israel). Barbell trajectories (A, B, and C) for the right and left sides were analyzed for each lift.

Results:

No significant difference was found in trajectory classification between sides of the barbell for either lift. The frequencies analysis revealed that type C barbell trajectories were the most prevalent in each lift. When the right and left sides of the barbell were compared during the snatch and clean, no significant differences were determined for any kinematic or kinetic variables.

Conclusions:

The V-scope system appears to facilitate analysis of barbell kinematics, kinetics, and trajectories during weightlifting competition regardless of which side of the barbell is analyzed.

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James J. McClain, Gregory J. Welk, Michelle Ihmels and Jodee Schaben

Background:

The PACER test is a valid and reliable assessment of aerobic capacity in children. However, many schools lack adequate space to administer the test. This study compared the utility of the standard 20m PACER test with an alternative 15m PACER protocol in 5th and 8th grade students.

Methods:

A total of 171 students completed both PACER protocols in a counterbalanced design. Agreement between the two protocols was assessed with correlations, repeated-measures ANOVA, and classification agreement into the FITNESSGRAM ® healthy fitness zones.

Results:

The difference in estimated VO2max between the two tests was slightly larger for boys (5th grade, 1.32 ml/kg/min; 8th grade, 1.72 ml/kg/min) than girls (5th grade, 0.14 ml/kg/min; 8th grade, 1.11 ml/kg/min), but these differences are probably not of practical significance. Classification agreement was 88% for boys and 91% for girls.

Conclusions:

Collectively, the results suggest that the 15m and 20m PACER provide similar information about aerobic fitness in youth. The 20m test is recommended when possible, but the 15m provides a useful alternative for schools with smaller gymnasiums.

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Floor Morriën, Matthew J. D. Taylor and Florentina J. Hettinga

Purpose:

To provide an overview of biomechanical studies in Paralympic research and their relevance for performance in Paralympic sports.

Methods:

The search terms paralympic biomechanics, paralympic sport performance, paralympic athlete performance, and paralympic athlete were entered into the electronic database PubMed.

Results:

Thirty-four studies were found. Biomechanical studies in Paralympics mainly contributed to performance enhancement by technical optimization (n = 32) and/or injury prevention (n = 6). In addition, biomechanics was found to be important in understanding activity limitation caused by various impairments, which is relevant for evidence-based classification in Paralympic sports (n = 6). Distinctions were made between biomechanical studies in sitting (41%), standing (38%), and swimming athletes (21%). In sitting athletes, mostly kinematics and kinetics in wheelchair propulsion were studied, mainly in athletes with spinal-cord injuries. In addition, kinetics and/or kinematics in wheelchair basketball, seated discus throwing, stationary shot-putting, hand-cycling, sit-skiing, and ice sledge hockey received attention. In standing sports, primarily kinematics of athletes with amputations performing jump sports and running and the optimization of prosthetic devices were investigated. No studies were reported on other standing sports. In swimming, mainly kick rate and resistance training were studied.

Conclusions:

Biomechanical research is important for performance by gaining insight into technical optimization, injury prevention, and evidence-based classification in Paralympic sports. In future studies it is advised to also include physiological and biomechanical measures, allowing the assessment of the capability of the human body, as well as the resulting movement.

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Joseph N. Cooper, Tiffany J. Davis and Shaun Dougherty

The purpose of this study was to examine the nature and quality of National Collegiate Athletic Association (NCAA) male student-athletes’ college experiences across race, sport, and divisional classifications. In recent years, the NCAA and its member institutions have faced intense scrutiny regarding the purpose of intercollegiate athletics within their educational missions. Additional concerns have been levied at the NCAA for persistent academic performance gaps along gender and racial lines across all divisions. However, limited research has engaged in multidivisional analyses of male student-athletes across racial groups and sport types. Using data from the 2006 NCAA GOALS study viewed through the lens of Bronfenbrenner’s ecological systems theory, the current study examined differences in male student-athletes’ experiences across racial groups, type of sport involvement, and divisional classifications. Key findings indicated salient differences between the social experiences across divisional and sport type classifications as well as significant differences between the academic experiences of Black and non-Black male student-athletes. Implications for policy and practice are discussed.

Le but de cette étude était d’examiner la nature et la qualité des expériences scolaires des étudiants-athlètes masculins de la National Collegiate Athletic Association (NCAA) en fonction de la race, du sport et la division de pratique. Récemment, la NCAA et ses institutions membres ont dû faire face à un examen minutieux concernant l’adéquation du sport interuniversitaire avec leurs missions éducatives. Des inquiétudes additionnelles ont été exprimées par la NCAA par rapport à la persistance des écarts en termes de réussite académique en fonction du sexe et de la race dans l’ensemble des divisions. Cependant, rares sont les travaux ayant proposé des analyses multidivisionnelles sur les étudiants-athlètes en fonction des groupes raciaux et des types de sports. En s’appuyant sur les données de l’étude NCAA GOALS de 2006, et au prisme de la théorie des systèmes écologiques de Bronfenbrenner, la présente étude a examiné les différences entre les expériences des étudiantsathlètes en fonction des groupes raciaux, du type d’investissement sportif et de la division de pratique. Les principaux résultats montrent des différences saillantes entre les expériences sociales en fonction du type de sport et du niveau de pratique mais aussi des différences significatives entre les expériences académiques des étudiants noirs et non-noirs. Les implications politiques et pratiques sont discutées.