Publications by authors named "Erik Willis"

This study explored whether baseline autonomous motivation (AM), controlled motivation (CM), and relative autonomy index (RAI) scores predicted 12-month weight in a three-arm randomized controlled trial of internet weight loss programs in primary care. It also evaluated perceived accountability to a primary care provider for weight loss as a moderator and study engagement (operationalized as weeks logged into the study website) as a mediator of these relationships. Participants with complete data for all model variables ( = 428) were included.

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Objective: Adaptive interventions may improve the potency and scalability of behavioral weight loss interventions, but the treatments-or treatment combinations-that should be offered are unknown. A two-stage pilot sequential multiple assignment randomized trial was used to test the timing and dose of human support added to a core digital weight loss program.

Methods: In stage 1, 99 adults with overweight/obesity were randomized at baseline to a kick-off with or without additional human support.

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Introduction: Social determinants of health (SDOH) may impact caregivers' ability to implement evidence-based health practices at home during early childhood, especially in families with children with intellectual and developmental disabilities (IDD). Therefore, we examined the influence of SDOH and children's diagnosis (typically developing [TD], Down syndrome [DS], autism) on caregiver's self-report of meeting evidence-based health practices.

Methods: Caregivers (n=172) of children ages 2-6 years (TD: n=93, DS: n=40, autism: n=39) completed an online survey on SDOH and health practices related to child nutrition (CN), physical activity (PA), outdoor play (OP), and screen time (ST).

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Article Synopsis
  • Caregivers of infants with Down syndrome (DS) practice different feeding strategies compared to those with typically developing (TD) infants, often not aligning with evidence-based practices.
  • Caregivers of infants with DS expressed more concern about their child's food intake and potential weight issues but were less informed on effective feeding methods during the complementary feeding period.
  • While some feeding practices, such as providing iron-rich foods and avoiding added salt, were adhered to by caregivers of infants with DS, they struggled with responsive feeding techniques and needed more support and resources to ensure optimal nutrition.
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Background: The Compendium of Physical Activities was published in 1993 to improve the comparability of energy expenditure values assigned to self-reported physical activity (PA) across studies. The original version was updated in 2000, and again in 2011, and has been widely used to support PA research, practice, and public health guidelines.

Methods: This 2024 update was tailored for adults 19-59 years of age by removing data from those ≥60 years.

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Purpose: This paper presents an update of the 2011 Wheelchair Compendium of Physical Activities designed for wheelchair users and is referred to as the 2024 Wheelchair Compendium. The Wheelchair Compendium aims to curate existing knowledge of the energy expenditure for wheelchair physical activities (PAs).

Methods: A systematic review of the published energy expenditure of PA for wheelchair users was completed between 2011 and May 2023.

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Purpose: To describe the development of a Compendium for estimating the energy costs of activities in adults ≥60 years (OA Compendium).

Methods: Physical activities (PAs) and their metabolic equivalent of task (MET) values were obtained from a systematic search of studies published in 4 sport and exercise databases (PubMed, Embase, SPORTDiscus (EBSCOhost), and Scopus) and a review of articles included in the 2011 Adult Compendium that measured PA in older adults. MET values were computed as the oxygen cost (VO, mL/kg/min) during PA divided by 2.

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Purpose: The physical frailty phenotype identifies individuals at risk for adverse health outcomes but has rarely been assessed among young adult cancer survivors (YACS). This study describes frailty status among YACS participating in a physical activity (PA) intervention trial.

Methods: YACS were categorized at baseline using the 5-item FRAIL scale: fatigue; weight loss; illness; ambulation; resistance.

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The physical frailty phenotype identifies individuals at risk for adverse health outcomes but has rarely been assessed among young adult cancer survivors (YACS). This study describes frailty status among YACS participating in a PA intervention trial. YACS were categorized by frailty status at baseline using the 5-item FRAIL index: fatigue; weight loss; illness; ambulation; resistance.

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Background: To fully leverage the potential of the early care and education (ECE) setting for childhood obesity prevention, initiatives must not intervene solely at the organizational level, but rather they should also address the health needs of the ECE workers. Workers suffer disproportionately high rates of obesity, and have reported low confidence in modeling and promoting healthy eating and activity behaviors. However, information regarding the effectiveness of improving ECE workers' health behaviors or whether such improvements elicit meaningful change in the ECE environment and/or the children in their care is limited.

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Childhood obesity in the United States is a serious problem that puts children at risk for poor health. Effective state-wide interventions are needed to address childhood obesity risk factors. Embedding evidence-based initiatives into state-level Early Care and Education (ECE) systems has the potential to improve health environments and promote healthy habits for the 12.

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Introduction/purpose: Wearables that include a color light sensor are a promising measure of electronic screen use in adults. However, to extend this approach to children, we need to understand feasibility of wear placement. The purpose of this study was to examine parent perceptions of children's acceptability of different sensor placements and feasibility of free-living 3- to 7-day wear protocols.

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Twenty-two on-demand nutrition training sessions were developed for Early Care and Education providers and disseminated in 21 states using the Go Nutrition and Physical Activity Self-Assessment for Child Care (Go NAPSACC) platform. The training was developed using the DESIGN (decide target behavior, explore determinants, select theory-based model, indicate objectives, generate education plans, and nail down the evaluation) procedure framework, adult learning principles, and behavior change techniques purposively disseminated. More than 96% of the nearly 3,000 providers who completed training in year 1 reported anticipated application of what they learned.

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The purpose of this study was to evaluate the feasibility and acceptability of randomizing adults with overweight and obesity (BMI 25-40 kg/m) to morning (06:00-10:00) or evening (15:00-19:00) aerobic exercise. Participants completed four exercise sessions per week in the morning (AM, = 18) or evening (PM, = 15). The exercise program was 15 weeks and progressed from 70 to 80% heart rate maximum and 750-2000 kcal/week.

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Purpose: The purpose is to examine predictors of intervention non-compliance and develop a risk stratification score.

Design: Prospective cohort.

Setting: Early care and education (ECE).

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Background: No cut-points have been developed for youth with Down syndrome; there is concern that altered gait patterns, decreased energy expenditure and exercise capacity of individuals with Down syndrome may produce inaccurate physical activity data if accelerometer data are analyzed using cut-points from populations with typical development and other IDD diagnoses.

Aim: To compare physical activity and sedentary time across existing accelerometer cut-point methods in adolescents with Down syndrome.

Methods: In this cross-sectional analysis, participants diagnosed with Down syndrome (n = 37; 15.

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Purpose: This study aimed to examine the shape of the relationship between physical activity (PA) and total energy expenditure (TEE) and to explore the role of energy balance status (negative, stable, positive) in influencing this association.

Methods: Cross-sectional. Participants were 584 older adults (50-74 yr) participating in the Interactive Diet and Activity Tracking in AARP study.

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Purpose: This study aimed to examine the association of the frequency component of the weekly PA guidelines on CmH in youth.

Methods: Cross-sectional accelerometer data from the 2003-2006 National Health and Nutrition Examination Survey included youth age 6-18 yr with ≥4 d, ≥10 h of wear time, and averaging ≥60 min·d-1 of MVPA (n = 656). Participants were categorized into quartiles based on the proportion of days where they met the guidelines (≥60 min of MVPA).

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Background/objectives: Individuals successful at weight loss maintenance engage in high amounts of physical activity (PA). Understanding how and when weight loss maintainers accumulate PA within a day and across the week may inform PA promotion strategies and recommendations for weight management.

Methods: We compared patterns of PA in a cohort of weight loss maintainers (WLM, n = 28, maintaining ≥13.

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Care2BWell was designed to evaluate the efficacy of Healthy Lifestyles (HL), a worksite health promotion intervention to increase child care workers' physical activity. The purpose of this study was to use process evaluation to describe the implementation of HL and determine if different levels of implementation are associated with changes in workers' physical activity. Data were collected from 250 workers randomized to HL, a 6 month, multilevel intervention that included an educational workshop followed by three 8 week campaigns that included self-monitoring and feedback, raffle incentive, social support, and center director coaching.

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Background: There is limited evidence describing associations between cancer and function in diverse cancer types and its relationship with mortality. We investigated the relationship between cancer and poor ambulatory function and associations between ambulatory function and subsequent mortality.

Methods: Participants included 233,135 adults ( = 30,403 cancer and = 202,732 cancer free) in the NIH-American Association of Retired Persons Diet and Health Study (1994-1996) who self-reported ambulatory function (e.

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Purpose: To quantify the differences in daily physical activity (PA) patterns, intensity-specific volumes, and PA bouts in youth with and without heart disease (HD).

Methods: Seven-day PA was measured on children/adolescents with HD (n = 34; median age 12.4 y; 61.

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