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334961
Interactive effects of sedentary behavior and moderate-vigorous physical activity on cardiovascular risks in older, community-dwelling Latinos


Monday, November 2, 2015

Shannon Halloway, BSN, RN, Department of Adult Health and Gerontological Nursing, Rush University, College of Nursing, Chicago, IL
JoEllen Wilbur, PhD, APN, FAAN, Women, Children & Family Nursing, Rush University, College of Nursing, Chicago, IL
Michael Schoeny, PhD, College of Nursing, Rush Universtiy, Chicago, IL
Background:  Older adults spend significantly more waking hours in sedentary behavior than other age groups, placing them at increased risk for cardiovascular disease (CVD).  This is particularly relevant to older Latinos, who are at high risk for CVD due to higher rates of hypertension, diabetes, and obesity. Limited attention has been directed toward the impact of sedentary behavior on CVD risks in older Latinos. The purpose of this study is to examine the interactive effects of sedentary behavior and moderate-vigorous physical activity (MVPA) on CVD risks in a sample of older Latinos.

Methods: A cross-sectional sample of 174, healthy, older Latinos (≥50 years) was recruited from community sites in neighborhoods with moderate-large Latino populations. Time in sedentary behavior and MVPA was obtained using accelerometers worn for seven consecutive days.  CVD risks (blood pressure, BMI, waist circumference, and cardiorespiratory fitness) were regressed on dichotomous measures of sedentary behavior (±75thpercentile), MVPA (±3 10-minute bouts per week) and their interaction, controlling for age and gender.

Results: The participants averaged 535.4 daily minutes of sedentary behavior and 11.4 daily minutes of MVPA.  Results showed significant sedentary behavior x MVPA interaction effects for BMI (p=.005), waist circumference (p=.002), and cardiorespiratory fitness (p=.012). For all three outcomes, the interactions were such that the benefits of MVPA were offset by excessive sedentary behavior.

Conclusions: Sedentary behavior can negatively impact CVD risks despite participation in MVPA. There is a need for increased attention toward establishing health guidelines aimed at limiting sedentary behavior in conjunction with increasing MVPA.

Learning Areas:

Chronic disease management and prevention
Diversity and culture
Public health or related nursing

Learning Objectives:
Describe the sedentary behavior and moderate-physical activity levels in a sample of older, community-dwelling Latinos. Evaluate the relation between sedentary behavior and moderate-vigorous physical activity and the effects on cardiovascular disease risks. Identify future directions for research and policy regarding sedentary behavior and moderate-vigorous physical activity guidelines for cardiovascular disease prevention.

Keyword(s): Physical Activity, Aging

Presenting author's disclosure statement:

Qualified on the content I am responsible for because: I am a PhD in Nursing Science student who has a federally-funded predoctoral fellowship for the study of physical activity and sedentary behavior in older Latinos. I have worked with two federally-funded physical activity clinical trials, and have published one physical activity manuscript and was a co-author for a book chapter on physical activity in women. My research interests are focused on modifiable health behaviors to prevent chronic diseases in older minorities.
Any relevant financial relationships? No

I agree to comply with the American Public Health Association Conflict of Interest and Commercial Support Guidelines, and to disclose to the participants any off-label or experimental uses of a commercial product or service discussed in my presentation.

Back to: 3315.0: What's Working in Physical Activity Interventions