- Balance, Gait, and Falls Prevention
- Older Adults Driving Studies
- Urban Transport and Accessibility
- Physical Activity and Health
- Stroke Rehabilitation and Recovery
- Cerebral Palsy and Movement Disorders
- Health disparities and outcomes
- Traffic and Road Safety
- Obesity, Physical Activity, Diet
- Cancer survivorship and care
- Human-Automation Interaction and Safety
- Marriage and Sexual Relationships
- Behavioral Health and Interventions
- Motivation and Self-Concept in Sports
- Child and Adolescent Psychosocial and Emotional Development
- Transportation and Mobility Innovations
- Parkinson's Disease Mechanisms and Treatments
- Nutrition and Health in Aging
- Urban Green Space and Health
- Dementia and Cognitive Impairment Research
- Diabetic Foot Ulcer Assessment and Management
- Health and Wellbeing Research
- Health and Lifestyle Studies
- Frailty in Older Adults
- Early Childhood Education and Development
Oregon Research Institute
2016-2025
Zhejiang Hospital
2024
Oregon Health & Science University
2023
Portland VA Medical Center
2023
Shanxi Agricultural University
2009-2022
Shanghai University of Sport
2014-2021
China Southern Power Grid (China)
2020
Eugene Research Institute
1996-2019
Willamette University
2002-2017
Sichuan Center for Disease Control and Prevention
2008-2016
Patients with Parkinson's disease have substantially impaired balance, leading to diminished functional ability and an increased risk of falling. Although exercise is routinely encouraged by health care providers, few programs been proven effective.We conducted a randomized, controlled trial determine whether tailored tai chi program could improve postural control in patients idiopathic disease. We randomly assigned 195 stage 1 4 on the Hoehn Yahr staging scale (which ranges from 5, higher...
Background. The authors' objective was to evaluate the efficacy of a 6-month Tai Chi intervention for decreasing number falls and risk falling in older persons.
To examine the relation between built environment factors (representing several dimensions of urban form neighbourhoods) and walking activity at both neighbourhood level resident level, in an older adult sample.A cross sectional, multilevel design with neighbourhoods as primary sampling unit senior residents secondary unit. Five hundred seventy seven (mean age = 74 years, SD 6.3 years) participated survey, which was conducted among 56 city defined Portland, Oregon, USA. Neighbourhood...
Abstract This report represents the perspective that adolescent substance use is best understood as an adaptation to ecology defined jointly by families and peers. Hypotheses were tested on a sample of 206 boys in Oregon Youth Study. The analyses proceeded four steps. First, it was found transition from middle high school period rapid growth smoking for with prior history low sociometric status. Second, structural equation model showing deviant peer association early adolescence mediated...
Data collected from 294 young adults, ages 19 to 25, and both a same- an opposite-gender best friend or mate across 3 annual assessments were analyzed examine the similarity influence of peer on adult's substance use. The authors found time between peers adult in cigarette use, alcohol binge drinking, and, most cases, marijuana In prospective analyses, use predicted problem by adults. Results generally consistent gender for peers. Findings emphasize contribution suggest design interventions...
To determine the effectiveness of tai chi on self-rated sleep quality and daytime sleepiness in older adults reporting moderate complaints.Randomized, controlled trial with allocation to or exercise control.General community.One hundred eighteen women men aged 60 92.Participants were randomized into low-impact participated a 60-minute session, three times per week, for 24 consecutive weeks.Primary outcome measures seven subscales Pittsburgh Sleep Quality Index (PSQI), PSQI global score,...
There is a need for greater understanding of setting-specific influences on physical activity to complement the predominant research paradigm individual-centered activity. In this study, authors used cross-sectional multilevel analysis examine range neighborhood-level characteristics and extent which they were associated with variation in self-reported among older adults. The sample consisted 582 community-dwelling residents age 65 years ( M = 73.99 years, SD 6.25) recruited from 56...
This study examined heterogeneity in response patterns of the participants Survey Activities and Fear Falling Elderly (SAFFE) their relationships to falls, functional ability, quality life, activity restriction measures a cohort 256 older people (mean age = 77.5 years). Participants recruited from local primary care clinics were administered SAFFE instrument, an measure, combination self-reported performance-based ability tests, quality-of-life measures. Latent class analyses identified two...
Purpose. Examine variation in obesity among older adults relative to the joint influences of density neighborhood fast food outlets and residents' behavioral, psychosocial, sociodemographic characteristics. Design. Cross-sectional multilevel design. Setting. Census block groups, used as a proxy for neighborhoods, within metropolitan region's Urban Growth Boundary Portland, Oregon. Subjects. A total 1221 residents (mean age, 65 years) recruited randomly from 120 neighborhoods (48% response...
Abstract This study investigated the extent to which interpersonal processes within male friendships are associated with violent behavior patterns during adolescence. At ages 13‐14, 15‐16, and 17‐18, we observed participants (206 boys) in our laboratory discussing problem solving situations a close friend. Although boys typically brought different friends for each of three assessments, found considerable continuity boys' behaviors, most notably topics discussed. In particular, tendency dyad...
Purpose: To determine whether improved functional balance through a Tai Chi intervention is related to subsequent reductions in falls among elderly persons. Methods: Two hundred fifty-six healthy, physically inactive older adults aged 70–92 (mean age ± SD = 77.48 4.95), recruited from local health system Portland, OR, participated 6-month randomized controlled trial, with allocation or exercise stretching control, followed by postintervention follow-up. Functional measures included Berg...
Abstract Building upon Deci and Ryan's (1985, 1991) self-determination theory as well previous empirical work on motivation, this paper presents studies the development validation of a multifaceted 31-item Exercise Motivation Scale (EMS). Evidence for factorial validity EMS was sought eight facets exercise motivation construct (amotivation, external regulation, introjected identified integrated intrinsic to learn, accomplish tasks, experience sensations). Results from various analyses showed...
This study examined neighborhood built environment characteristics (fast-food restaurant density, walkability) and individual eating-out physical activity behaviors in relation to 1-year change body weight among adults 50-75 years of age at baseline.The authors surveyed 1,145 residents recruited from 120 neighborhoods Portland, Oregon.During the follow-up (2006-2007 2007-2008), mean increased by 1.72 kg (standard deviation, 4.3) waist circumference 1.76 cm 5.6).Multilevel analyses revealed...
China is experiencing significant public health challenges related to social and demographic transitions lifestyle transformations following unprecedented economic reforms four decades ago. Of particular concern the fourfold increase in overweight obesity rates nation’s youth population, coupled with low prevalence of adolescents meeting recommended levels physical activity. Improving overall China’s more than 170 million children has become a national priority. However, advancing nationwide...
Falls in older adults are a serious public health problem associated with irreversible consequences and responsible for substantial economic burden on care systems. However, identifying optimal choices from among evidence-based fall prevention interventions is challenging as few comparative data effectiveness available.To determine the of therapeutically tailored tai ji quan intervention, Tai Ji Quan: Moving Better Balance (TJQMBB), developed classic concept (also known chi), multimodal...