Using a customer discovery process to enhance the potential dissemination and scalability of a family healthy weight program for rural communities and small towns.

AIM: Customer discovery, an entrepreneurial and iterative process to understand the context and needs of potential adoption agencies, may be an innovative strategy to improve broader dissemination of evidence-based interventions. This paper describes the customer discovery process for the Building Healthy Families (BHF) Online Training Resources and Program Package (BHF Resource Package) to support rural community adoption of an evidence-based, family healthy weight program. METHODS: The customer discovery process was completed as part of a SPeeding Research-tested INTerventions (SPRINT) training supported by the U.S. Centers for Disease Control and Prevention. Customer discovery interviews (n=47) were conducted with people that could be potential resource users, economic buyers, and BHF adoption influencers to capture multiple contextual and needs-based factors related to adopting new evidence-based interventions. Qualitative analyses were completed in an iterative fashion as each interview was completed. RESULTS: The BHF Resource Package was designed to be accessible to a variety of implementation organizations. However, due to different resources being available in different rural communities, customer discovery interviews suggested that focusing on rural health departments may be a consistent setting for intervention adoption. We found that local health departments prioritize childhood obesity but lacked the training and resources necessary to implement effective programming. Several intervention funding approaches were also identified including (1) program grants from local and national foundations, (2) healthcare community benefit initiatives, and (3) regional employer groups. Payment plans recommended in the customer discovery interviews included a mix of licensing and technical support fees for BHF delivery organizations, potential insurance reimbursement, and family fees based on ability to pay. Marketing a range of BHF non-weight related outcomes was also recommended during the customer discovery process to increase the likelihood of BHF scale-up and sustainability. CONCLUSIONS: Engaging in customer discovery provided practical directions for the potential adoption, implementation, and sustainability of the BHF Resource Package. However, the inconsistent finding that health departments are both the ideal implementation organization, but also see childhood obesity treatment as a clinical service, is concerning.

Building Healthy Families: Outcomes of an Adapted Family Healthy Weight Program Among Children in a Rural Mid-Western Community.

Background: This study aimed to evaluate the effectiveness of implementing an adapted, evidence-based 12-week Family Healthy Weight Program (FHWP), Building Healthy Families, on reducing BMI metrics and clinical health indicators in a real-world community setting. Methods: Ninety child participants with a BMI percentile greater or equal to the 95th percentile for gender and age and their parents/guardians (n = 137) enrolled in the program. Families attended 12 weekly group-based sessions of nutrition education, family lifestyle physical activity, and behavior modification. A pre-post study design with a 6-month follow-up was used. Results: Nine cohorts of families between 2009 and 2016 completed the program with 82.1% retention at 12 weeks and 53.6% at 6 months. Participants had statistically significant improvements at 12 weeks in BMI z-score, %BMIp95, body mass, body fat, fat mass, fat-free mass, and systolic blood pressure with greater improvement at 6 months in body mass, BMI metrics, body fat, fat mass, fat-free mass, and systolic blood pressure. Parents/guardians of the participants had similar statistically significant body composition and blood pressure improvements (p < 0.05). In addition, children had significant improvements in high-density lipoprotein (HDL) cholesterol and aspartate aminotransferase (AST) liver enzymes at 6 months. Conclusions: Overall, this study demonstrated that an evidence-based FHWP can result in statistically meaningful declines in BMI z-score and accompanied clinically meaningful changes in health risk. Participants lost ∼4% of their body mass in 12 weeks, while their parents/guardians lost closer to 7% of their body mass, which supports previous literature suggesting body mass changes influence health.

Understanding implementation costs of a pediatric weight management intervention: an economic evaluation protocol.

BACKGROUND: Understanding the cost and/or cost-effectiveness of implementation strategies is crucial for organizations to make informed decisions about the resources needed to implement and sustain evidence-based interventions (EBIs). This economic evaluation protocol describes the methods and processes that will be used to assess costs and cost-effectiveness across implementation strategies used to improve the reach, adoption, implementation, and organizational maintenance of an evidence-based pediatric weight management intervention- Building Health Families (BHF). METHODS: A within-trial cost and cost-effectiveness analysis (CEA) will be completed as part of a hybrid type III effectiveness-implementation trial (HEI) designed to examine the impact of an action Learning Collaborative (LC) strategy consisting of network weaving, consultee-centered training, goal-setting and feedback, and sustainability action planning to improve the adoption, implementation, organizational maintenance, and program reach of BHF in micropolitan and surrounding rural communities in the USA, over a 12-month period. We discuss key features of implementation strategy components and the associated cost collection and outcome measures and present brief examples on what will be included in the CEA for each discrete implementation strategy and how the results will be interpreted. The cost data will be collected by identifying implementation activities associated with each strategy and using a digital-based time tracking tool to capture the time associated with each activity. Costs will be assessed relative to the BHF program implementation and the multicomponent implementation strategy, included within and external to a LC designed to improve reach, effectiveness, adoption, implementation, and maintenance (RE-AIM) of BHF. The CEA results will be reported by RE-AIM outcomes, using the average cost-effectiveness ratio or incremental cost-effectiveness ratio. All the CEAs will be performed from the community perspective. DISCUSSION: The proposed costing approach and economic evaluation framework for dissemination and implementation strategies and EBI implementation will contribute to the evolving but still scant literature on economic evaluation of implementation and strategies used and facilitate the comparative economic analysis. TRIAL REGISTRATION: ClinicalTrials.gov NCT04719442 . Registered on January 22, 2021.

Qualitative Comparative Analysis of Program and Participant Factors That Explain Success in a Micropolitan Pediatric Weight Management Intervention.

Background: Building Healthy Families (BHF) was developed through a community-academic partnership to provide a 12-week family-based obesity treatment program. Nine cohorts of BHF have been delivered in multiple micropolitan settings between 2009 and 2016, but participant outcomes have varied. This study sought to explore the variation in BHF outcomes to identify the necessary and sufficient conditions that are associated with larger 12-week reductions in BMI z-scores. Methods: A qualitative comparative analysis was used to determine potential causal conditions or combination of conditions associated with larger reductions in BMI z-score. Seventy-five participants with 12-week outcome data were rank ordered as the 10 most successful participants (largest reductions in BMI z-score; m ± std = -0.64 ± 0.18) and the 10 least successful participants (smallest reductions or an increase in BMI z-score; m ± std = 0.02 ± 0.04). The conditions selected for analysis were identified based on theory and the delivery team's experience with implementing BHF. Results: Necessary conditions (i.e., present in all highly successful participants, but also some less successful participants) included children with high attendance and self-regulation, at least one adult with high attendance and self-regulation, a mother who lost weight during the program and achieved clinically meaningful weight loss. Sufficient conditions (i.e., present in only the highly successful participants) included mothers with self-regulation scores >45% (range 46.7%-98.2%), and children with a combination of high attendance (72%-100%) and self-regulation scores ≥45% (45%-92.7%). Conclusion: Program implementers should continue to focus on encouraging high attendance and emphasize the necessity of enacting self-regulation strategies at both the child and parent level.

Packaging of a Pediatric Weight Management Intervention and Implementation Blueprint for Rural and Micropolitan Communities: The Nebraska CORD 3.0 Project.

Pediatric weight management interventions (PWMIs) have resulted in positive changes among family members and, if widely disseminated, could have an impact on pediatric weight management in rural communities. The purpose of this article is to describe a backward design approach taken to create an online packaged program and implementation blueprint for building healthy families (BHF), an effective PWMI for implementation in rural communities. The backward design process included the identification of end users: primary (facilitators to be trained through the packaged program and implementation blueprint), secondary (researchers and evaluators), terminal (caregivers and children impacted by PWMI participation), tertiary (community support organizations, funding agency promoting widespread PWMI, and payors), as well as, key outcomes for respective end user groups based on the reach, effectiveness, adoption, implementation, and maintenance (RE-AIM) framework. This process resulted in the BHF Online Training Resources and Program package and implementation blueprint that included a modular approach encompassing the interplay of training modules for program facilitators, knowledge checks to ensure mastery of program components, recruitment resources for school and clinical settings, all program materials, embedded fidelity assessments for quality assurance, and a data portal to track participant success. Next steps include preliminary product testing with potential facilitators and a type 3 effectiveness implementation trial to determine the utility of the BHF Online Training Resources and Program package with and without participation in a learning collaborative to support implementation and sustainability.

A Type III Hybrid Effectiveness-Implementation Pilot Trial Testing Dissemination and Implementation Strategies for a Pediatric Weight Management Intervention: The Nebraska Childhood Obesity Research Demonstration Project.

Background: Several family-based efficacious pediatric weight management interventions (PWMIs) have been developed to reduce child weight status. These programs are typically based in larger cities delivered by an interdisciplinary team in a hospital or medical center. The degree to which these efficacious PWMIs have been translated to, and are feasible in, rural or micropolitan areas is unclear. This study protocol describes a pilot Type III hybrid effectiveness-implementation (T3HEI) trial testing a multilevel strategy that focuses on the adoption, implementation, and sustainability of a PWMI online training program and resource package designed for implementation in micropolitan and rural areas. Methods: The trial design employed the Reach, Effectiveness, Adoption, Implementation and Maintenance (RE-AIM) framework to evaluate outcomes and the Promoting Action on Research Implementation in Health Services framework to specify potential mechanisms of adoption, implementation, and sustainability. The study will test the feasibility of a fund and contract dissemination strategy in the adoption of a PWMI in four to eight rural communities, compare a learning collaborative implementation strategy including embedded training and sustainability action planning with communities who receive the PWMI online program and resources alone, and determine whether the PWMI reach, effectiveness, and maintenance are of magnitude similar to previous effectiveness trials. The dissemination and implementation process focused on an integrated research-practice partnership process model that includes a systems-based approach with multiple sectors and vertical decision-making representation. Conclusions: Our pilot T3HEI study has the potential to inform how best to move and sustain evidence-based PWMIs into practice. The findings will inform larger scale dissemination, implementation, and sustainability efforts in medically underserved areas across the country. Trial registration: This protocol is registered with clinicaltrials.gov (NCT04719442).

Examining the feasibility and characteristics of realistic weight management support for patients: Focus groups with rural, micropolitan, and metropolitan primary care providers.

The purpose of this investigation was to understand perspectives of physicians, nurses, and staff regarding the feasibility of implementing an evidence-based weight management program to support primary care practice. An exploratory aim was to examine differences in responses based on the clinic location. Ten focus groups were conducted with primary care staff from rural, micropolitan, and metropolitan clinics. The Promoting Action on Research in Health Services (PARIHS) framework was used to inform the interview guide. Transcripts were reviewed to identify common themes among PARIHS constructs (evidence, context, and facilitation). Presence of comorbidities (e.g., diabetes, hypertension) were typical prompts for provider-led discussions about patient weight. Metropolitan clinics reported the availability of health coaching, diabetes education, or dietician consultation, but no clinic reported offering a comprehensive weight management program. Participants agreed it is possible to implement a weight management program through primary care, but cited potential facilitation challenges such as costs, clinic resources, and individual patient barriers. More enthusiasm arose for a referral program with patient tracking. Program characteristics such as proven efficacy, individual tailoring, program accessibility, and patient feedback to the providers were desired. Rural focus group participants reported unique barriers (lack of local resources) and facilitators (more flexibility in practice changes) to weight management when compared to metropolitan and micropolitan focus groups. Primary care staff are interested in weight management solutions for their patients and would prefer an evidence-based program to which they could refer patients, receive feedback on patient progress, and sustainably include as part of their regular services.

A Dissemination Strategy to Identify Communities Ready to Implement a Pediatric Weight Management Intervention in Medically Underserved Areas.

PURPOSE AND OBJECTIVES: We developed a competitive application process to test the feasibility of a fund and contract dissemination strategy to identify and engage communities that demonstrated the necessary resources and motivation to adopt, implement, and sustain a pediatric weight management intervention, Building Healthy Families, in rural and micropolitan (<50,000 residents) communities in Nebraska. INTERVENTION APPROACH: From April through December 2019, a community advisory board with representation from rural and micropolitan clinical, public health, education, and recreational organizations collaboratively developed a request for applications, as a fund and contract dissemination strategy, to encourage community adoption of Building Healthy Families. EVALUATION METHODS: Quantitative assessments included determining the distribution of requests for applications, evaluating organizational readiness to change assessment (ORCA) ratings (on a scale of 1 to 5, from strongly disagree to strongly agree that the organization is ready to change), and reviewing community advisory board member ratings of applications. We gathered qualitative data from community narratives provided in response to the request for applications and community advisory board reviews of the applications. RESULTS: The request for applications was distributed to all 93 counties in Nebraska. Of the 8 communities that submitted a letter of intent, 7 submitted a community narrative. Across the 8 communities, 31 ORCAs were completed by the organizational decision makers (n = 15) and staff members (n = 16) who would be responsible for screening, recruiting, or implementing the intervention. Overall mean ORCA scores varied by ratings of evidence (4.1-4.6), context (4.2-4.9), and facilitation (4.3-4.8), indicating a high degree of readiness. Community advisory board ratings of applications ranged from 2.3 to 3.4 of 4 points. Qualitative data indicated that lower community narrative scores were primarily caused by weak implementation and sustainability plans. IMPLICATIONS FOR PUBLIC HEALTH: Findings provide guidance for translating pediatric weight management programs in medically underserved geographic areas by maximizing the probability of successful adoption and implementation through a fund and contract dissemination strategy.

Longitudinal Evaluation of Aerobic Fitness and Academic Achievement Among Schoolchildren.

BACKGROUND: Research is emerging suggesting that fitness not only improves health, but enhances academic achievement in children. Many studies have found the strongest correlation with academic achievement to be aerobic fitness. The purpose of this study is to examine the influence of aerobic fitness and academic ranking on the association between improvements in students' aerobic fitness and their academic achievement. METHODS: Data were collected from 1152 second- through fifth-grade students enrolled in 10 Midwestern schools. School-fixed effects models were used to estimate the impact of improved aerobic fitness from the fall to the spring semester on students' spring percentile rankings in math and reading. RESULTS: Students whose progressive aerobic cardiovascular endurance run improved from the fall to spring semester moved up the national spring math percentile rankings by 2.71 percentiles (p < .001) for all students, 4.77 (p < .001) for less-fit students, and 3.53 (p < .05) for lower performing math students. No statistically significant relationship was found between improved aerobic fitness and reading achievement. CONCLUSIONS: Improving fitness could potentially have the greatest academic benefit for those elementary students who need it the most-the less fit and the lower academic performers.

Impact of schoolchildren's involvement in the design process on the effectiveness of healthy food promotion materials.

Marketing techniques may improve children's vegetable consumption. However, student participation in the design of marketing materials may increase the material's salience, while also improving children's commitment and attitudes towards healthy eating. The impact of student-led design of vegetable promotional materials on choice and consumption was investigated using 1614 observations of students' vegetable choice and plate waste in four public elementary schools in Kearney, Nebraska. Data were collected on children's vegetable choice and consumption in four comparison groups: 1) control; 2) students designed materials only; 3) students were exposed to promotional materials only; and 4) students designed materials that were then posted in the lunchroom. Vegetable choice and consumption data were collected through a validated digital photography-based plate-waste method. Multivariate linear regression was used to estimate average treatment effects of the conditions at various time periods. Dependent variables were vegetable choice and consumption, and independent variables included the condition, time period, and interaction terms, as well as controls for gender and grade. Relative to baseline, students in group 4 doubled their vegetable consumption (p < 0.001) when materials were posted. Vegetable consumption remained elevated at a follow-up 2-3 months later (p < 0.05). Students in group 3 initially increased the quantity of vegetables selected (p < 0.05), but did not increase consumption. In the follow-up period, however, students in group 3 increased their vegetable consumption (p < 0.01). Involving elementary-aged students in the design of vegetable promotional materials that were posted in the lunchroom increased the amount of vegetables students consumed.

Healthier School Environment Leads to Decreases in Childhood Obesity: The Kearney Nebraska Story.

BACKGROUND: Schools play a role in addressing childhood obesity by implementing healthy eating and physical activity strategies. The primary aim of this case study was to describe prevalence of overweight and obesity among elementary school students in a rural Mid-western community between 2006 and 2012. The secondary aim was to use a novel approach called "population dose" to retrospectively evaluate the impact dose of each strategy implemented and its estimated potential population level impact on changes in overweight and obesity. METHODS: Weight and height were directly measured annually beginning in January 2006 to assess weight status, using BMI (kg/m(2)), for all kindergarten to fifth-grade students (N ≈ 2400 per year). Multiple evidence-based strategies were implemented in nine schools to increase physical activity and healthy eating behaviors. BMI reporting and revised school meal programs were implemented districtwide. Comprehensive school physical activity programs, school food environment, and supportive/promotional strategies were implemented at individual schools. RESULTS: The absolute change in prevalence of obesity (BMI ≥95th percentile) decreased from 16.4% to 13.9%, indicating a 15.2% relative change in prevalence of obesity in 6 years. There was an inverse relationship between the number of strategies implemented and prevalence of overweight and obesity over time. CONCLUSIONS: District and school-level approaches have the potential to impact childhood obesity. Schools can successfully implement strategies to address overweight and obesity, but the extent of implementation between schools may vary. Population dose analysis can be used to estimate impact of clusters of strategies to address overweight/obesity.

Calibration of self-report tools for physical activity research: the Physical Activity Questionnaire (PAQ).

BACKGROUND: The utility of self-report measures of physical activity (PA) in youth can be greatly enhanced by calibrating self-report output against objectively measured PA data.This study demonstrates the potential of calibrating self-report output against objectively measured physical activity (PA) in youth by using a commonly used self-report tool called the Physical Activity Questionnaire (PAQ). METHODS: A total of 148 participants (grades 4 through 12) from 9 schools (during the 2009-2010 school year) wore an Actigraph accelerometer for 7 days and then completed the PAQ. Multiple linear regression modeling was used on 70% of the available sample to develop a calibration equation and this was cross validated on an independent sample of participants (30% of sample). RESULTS: A calibration model with age, gender, and PAQ scores explained 40% of the variance in values for the percentage of time in moderate-to-vigorous PA (%MVPA) measured from the accelerometers (%MVPA = 14.56 - (sex*0.98) - (0.84*age) + (1.01*PAQ)). When tested on an independent, hold-out sample, the model estimated %MVPA values that were highly correlated with the recorded accelerometer values (r = .63) and there was no significant difference between the estimated and recorded activity values (mean diff. = 25.3 ± 18.1 min; p = .17). CONCLUSIONS: These results suggest that the calibrated PAQ may be a valid alternative tool to activity monitoring instruments for estimating %MVPA in groups of youth.

Validity of HydraTrend reagent strips for the assessment of hydration status.

Hydration is used by athletic governing organizations for weight class eligibility. The measurement of urine specific gravity (USG) as a measure of hydration by reagent strips is a controversial issue. The purpose of this study was to determine the validity of HydraTrend reagent strips that facilitate the correction of USG for alkaline urine samples against refractometry for the assessment of USG. Fifty-one participants (33 males, age = 22.3 ± 1.3 years; 18 females, age = 22.4 ± 1.2 years) provided 84 urine samples. The samples were tested for USG using refractometry and reagent strips and for pH using reagent strips and a digital pH meter. Strong correlation coefficients were found between refractometry and reagent strips for USG (rs(82) = 0.812, p < 0.01) and between reagent strips and pH meter for pH (rs(82) = 0.939, p < 0.01). It was observed that false negative results for National Collegiate Athletic Association (NCAA) requirements (fail refractometry with USG >1.020, pass reagent strips with USG ≤1.020) occurred 39% (33/84) of the time and false negative results for National Federation of State High School Association (NFHS) requirements (fail refractometry with USG >1.025, pass reagent strips with USG ≤1.025) occurred 14% (12/84) of the time. There were no false positives (pass refractometry and fail reagent strips) for NCAA or NFHS requirements. These data show that refractometry and reagent strips have strong positive correlations. However, the risk of a false negative result leading to incorrect certification of euhydration status outweighs the benefits of the HydraTrend reagent strips for the measurement of USG.

Outcomes of a Family Based Pediatric Obesity Program - Preliminary Results.

Children that are classified as obese (body mass index (BMI) > 95th percentile for age and sex, Centers for Disease Control and Prevention) have an increased risk for metabolic and cardiovascular complications. Family based programs that focus on physical activity (PA) and healthy eating are recommended for treatment of pediatric obesity. The purpose of the current study is to determine the outcomes of Building Healthy Families (BHF), a family-based pediatric weight loss treatment program composed of nutrition, physical activity and behavioral modification strategies. In addition, mediating variables that are associated with weight loss in children, in order to enhance the retention and success of this program will be identified. Twenty-two obese (>95th percentile BMI) children (age: 9.94 ± 1.58 yrs) volunteered to participate. Children and their parents (20 moms, 20 dads, 68% obese; BMI > 30 kg·m-2) participated in weekly nutrition education, family lifestyle PA, and one-on-one meetings with a behavioral psychologist. Overall, child participants lost an average of 2.3 ± 2.0 kg of body mass in 12 weeks while parents lost 6.4 ± 4.3 kg of their body mass. There was a significant inverse association between percentage of program goals met and weight loss (r = - 0.67, p < 0.05). Decreases in the child participants intake of high fat, high calorie foods significantly predicted weight change (R2=0.98, p<0.05). In conclusion, family based pediatric obesity programs may offer significant benefits and lead to healthier lifestyles for obese children and their parents.

Associations between moderate-to-vigorous physical activity and central body fat in 3-8-year-old children.

The aim of this study was to examine the associations between objectively measured moderate-to-vigorous physical activity (MVPA) and central body fat (CBF) indicators by anthropometry and dual energy X-ray absorptiometry (DXA) in young children. This study comprised 110 children aged 3-8 years. The associations between MVPA and CBF measures by anthropometry (waist circumference, waist-to-height ratio, skinfold thicknesses [subscapular, suprailiac, trunk-to-extremity and trunk-to-total skinfold ratios] and total trunk-to-waist circumference), DXA (trunk fat) and a combination of both (total trunk skinfolds-to-trunk fat by DXA) were examined by linear regression. Levels of MVPA showed a significant inverse association with 8 of 9 indicators of CBF after controlling for age, gender and height, and fat-free mass. When total fat mass measured by DXA was included into the model, levels of MVPA remained significantly associated with 6 of 9 indicators of CBF. The results highlight the plausible role of MVPA on CBF in young children but longitudinal studies are necessary.

Morning cortisol is not associated with truncal fatness or resting blood pressure in children: cross-sectional and 1-2 year follow-up analyses.

OBJECTIVE: To evaluate the cross-sectional and longitudinal relationships of morning cortisol with trunk fat and resting blood pressure (BP) in children. METHODS: Participants included 72 children aged 4-10 years (mean 7.4 yrs) for the cross-sectional analysis and 58 for the longitudinal analysis. Height, weight, waist circumference, body fat by dual x-ray absorptiometry, and resting BP measures were obtained during a laboratory visit. Saliva samples were collected at home on a single morning and assayed for cortisol. RESULTS: Approximately 21% were overweight (15.3%) or obese (5.6%). Mean morning cortisol was 0.25 +/- 0.12 microg/dL (6.99 +/- 3.46 nmol/L). There were no significant correlations between morning cortisol and any of the measures of fatness (r < -0.17) or BP (r < -0.10) at baseline. Cortisol at baseline was not associated with changes in body size parameters after the 1- and 2-year followup period. CONCLUSION: Morning cortisol was not associated with body fatness or BP. Future studies should examine the associations between the diurnal cortisol patterns, trunk fat, and BP by collecting samples throughout an entire day.

Maternal prepregnancy overweight and offspring fatness and blood pressure: role of physical activity.

The purpose of this study was to examine if offspring physical activity may affect the relationship between maternal overweight and offspring fatness and blood pressure (BP). Subjects included 144 maternal-child pairs (n = 74 boys and 70 girls, mean age = 7.3 yrs). Maternal prepregnancy BMI was determined by self-report. Offspring characteristics included resting systolic and diastolic BP, body fatness by dual energy x-ray absorbtiometry, and moderate-to-vigorous physical activity (MVPA) using the Actigraph accelerometer. Children whose mothers were overweight or obese prepregnancy (Prepreg OW) were significantly larger and fatter than children from mothers with a normal prepregnancy BMI (Prepreg NORM). Prepreg OW children also had higher mean arterial pressure than Prepreg NORM children. BP values were not different across maternal Prepreg BMI/ MVPA groups. Percent fat was significantly different across Prepreg BMI/MVPA groups. Prepreg OW children that did not meet the daily recommended value of MVPA were the fattest. Prepreg OW children that attained (3)60 min of MVPA/ day had a mean percent body fat that was similar to Prepreg NORM children of either MVPA group.

Comparison of energy expenditure on a treadmill vs. an elliptical device at a self-selected exercise intensity.

Treadmills (TM) and elliptical devices (EL) are popular forms of exercise equipment. The differences in the training stimulus presented by TM or EL are unknown. The purpose of this investigation was to evaluate oxygen consumption, energy expenditure, and heart rate on a TM or EL when persons exercise at the same perceived level of exertion. After measuring peak oxygen uptake (VO2peak) in 9 male and 9 female untrained college-aged participants, the subjects performed 2 separate 15-minute submaximal exercise tests on the TM and EL at a rating of perceived exertion (RPE) of 12-13. VO2peak was higher (p<0.05) in the males (48.6+/-1.5 vs. 45.2+/-1.6 ml/kg/min) than the females (41.7+/-1.8 vs. 38.8+/-2.2 ml/kg/min) for both TM and EL (means+/-standard error of the mean; for TM vs. EL respectively), but there were no differences in the measured VO2peak between TM or EL. During submaximal exercise there were no differences in RPE between TM and EL. Total oxygen consumption was higher (p<0.05) in males (30.8+/-2.2 vs. 34.9+/-2.2 L) than females (24.1+/-1.8 vs. 26.9+/-1.7 L) but did not differ between TM and EL. Energy expenditure was not different between TM (569+/-110 J) or EL (636+/-120 kJ). Heart rate was higher (p<0.05) on the EL (164+/-16 beats/min) compared to the TM (145+/-15 beats/min). When subjects exercise at the same RPE on TM or EL, oxygen consumption and energy expenditure are similar in spite of a higher heart rate on the EL. These data indicate that during cross training or noncompetition-specific exercise, an elliptical device is an acceptable alternative to a treadmill.

The Association between Soft Drink Consumption and Body Fat in Females Age 16 to 24.

American soft drink consumption (SDC) has increased since the 1960's surpassing all other kinds of beverage consumption. In recent years, the scientific literature has suggested that SDC has been linked to the rising epidemic of obesity in children and adolescents. However, there is lack of information in scientific literature on the effects of SDC on body fat (BF%) in young females. The purpose of this study was to determine the association between SDC and BF% in young women, ages 16-24 years. Sixty-six females were asked to complete a 3-day food record, food frequency questionnaire, and an assessment BF% by dual-energy x-ray absorptiometry (DXA). Overall, participants consumed 29.44 ± 44.68 fl oz/day of soft drinks. There were significant positive associations between SDC and BF% (r = 0.24, p < 0.05). Due to the large standard deviation in SDC, secondary analysis compared moderate SDC (MSDC: < 32 fl oz/day) to high SDC (HSDC: ≥ 32 fl oz/day). Results suggested HSCD had significantly greater BF% than MSDC. Therefore, limiting the consumption of soft drinks is suggested in order to maintain a healthy BF%.

Evaluation of a walking school bus for promoting physical activity in youth.

BACKGROUND: Walking to and from school has potential to increase daily physical activity among children. METHODS: A Walking School Bus (WSB) intervention was implemented for 2 years in 2 schools with a third school as a control. The primary aim evaluated school-wide prevalence of walking to school by self-report 6 times (fall, winter, spring). The secondary aims compared objective physical activity levels among a subsample of research participants (intervention [INT] = 201, control [CON] = 123) and between frequency of walking to school groups. INT and CON participants wore an accelerometer during 4 time periods to assess daily physical activity and were measured for body mass index (BMI) and body fat each fall and spring. RESULTS: School-wide prevalence of walking to school frequently (> 50% of the time each week) was 27% higher in the WSB schools than in the control school. INT obtained significantly more daily physical activity than CON (78.0 [38.9] vs 60.6 [27.7] min/d, P < .05). In addition, across all schools, frequent walkers obtained 25% more physical activity (P < .05), gained 58% less body fat (P < .05), and attenuated BMI by 50% (P < .05) compared with passive commuters. CONCLUSION: This study suggests a WSB intervention may increase frequency of walking to school and establishes a link with increased daily physical activity.