title: Correlates of objectively measured physical activity in cardiac patients.
abstract: Cardiac patients would benefit from increasing their physical activity (PA) levels. Understanding of factors that influence cardiac patients' PA participation would benefit the development of effective interventions. Therefore, the purpose of this study was to determine correlates of objectively-measured PA in cardiac patients. Participants were 65 cardiac patients (74% male, 95% white), age 58.6±10.6 years. The amount of time spent in PA was measured by ActiGraph GT3X accelerometers for 7 days prior to joining cardiac rehabilitation programs (CRP). A total of 25 potential determinants of PA across multiple domains (demographic, clinical, psychosocial, and behavioral) were measured via self-reported questionnaire and clinical examinations. Backward elimination model selection procedures were performed to examine associations of potential determinants with total PA (min/day) and moderate-to-vigorous PA (MVPA) (min/day). Patients spent 153.8±62.8 and 8.4±8.1 min/day in total PA and MVPA, respectively. Across four domains, ten and five potential correlates were found to be significant in univariate analyses for MVPA and total PA, respectively. In the final model, functional capacity, PA readiness, and participation in regular exercise were positively associated with MVPA (R(2) =26.6%). Functional capacity and PA readiness were also positively associated with total PA (R(2) =15.9%). Future initiatives to increase PA levels in cardiac patients could be improved by considering patients' functional capacity, PA readiness, and exercise history in designing interventions.
authors.affiliation: 1 Health, Nutrition, and Exercise Sciences, North Dakota State University, Fargo, ND 58102, USA ; 2 Master of Public Health Program, North Dakota State University, Fargo, ND, USA ; 3 Clinical Exercise Physiology Program, Human Performance Laboratory, Ball State University, Muncie, IN 47306, USA ; 4 Cardiopulmonary Rehabilitation Program, Indiana University Health - Ball Memorial Hospital, Muncie, IN, USA ; 5 Department of Kinesiology, University of Wisconsin-Milwaukee, Milwaukee, WI, USA ; 6 Center for Aging and Translational Research, University of Wisconsin-Milwaukee, Milwaukee, WI, USA.
authors.forename: Wonwoo
authors.initials: W
authors.lastname: Byun
authors.affiliation: 1 Health, Nutrition, and Exercise Sciences, North Dakota State University, Fargo, ND 58102, USA ; 2 Master of Public Health Program, North Dakota State University, Fargo, ND, USA ; 3 Clinical Exercise Physiology Program, Human Performance Laboratory, Ball State University, Muncie, IN 47306, USA ; 4 Cardiopulmonary Rehabilitation Program, Indiana University Health - Ball Memorial Hospital, Muncie, IN, USA ; 5 Department of Kinesiology, University of Wisconsin-Milwaukee, Milwaukee, WI, USA ; 6 Center for Aging and Translational Research, University of Wisconsin-Milwaukee, Milwaukee, WI, USA.
authors.forename: Cemal
authors.initials: C
authors.lastname: Ozemek
authors.affiliation: 1 Health, Nutrition, and Exercise Sciences, North Dakota State University, Fargo, ND 58102, USA ; 2 Master of Public Health Program, North Dakota State University, Fargo, ND, USA ; 3 Clinical Exercise Physiology Program, Human Performance Laboratory, Ball State University, Muncie, IN 47306, USA ; 4 Cardiopulmonary Rehabilitation Program, Indiana University Health - Ball Memorial Hospital, Muncie, IN, USA ; 5 Department of Kinesiology, University of Wisconsin-Milwaukee, Milwaukee, WI, USA ; 6 Center for Aging and Translational Research, University of Wisconsin-Milwaukee, Milwaukee, WI, USA.
authors.forename: Katrina
authors.initials: K
authors.lastname: Riggin
authors.affiliation: 1 Health, Nutrition, and Exercise Sciences, North Dakota State University, Fargo, ND 58102, USA ; 2 Master of Public Health Program, North Dakota State University, Fargo, ND, USA ; 3 Clinical Exercise Physiology Program, Human Performance Laboratory, Ball State University, Muncie, IN 47306, USA ; 4 Cardiopulmonary Rehabilitation Program, Indiana University Health - Ball Memorial Hospital, Muncie, IN, USA ; 5 Department of Kinesiology, University of Wisconsin-Milwaukee, Milwaukee, WI, USA ; 6 Center for Aging and Translational Research, University of Wisconsin-Milwaukee, Milwaukee, WI, USA.
authors.forename: Scott
authors.initials: S
authors.lastname: Strath
authors.affiliation: 1 Health, Nutrition, and Exercise Sciences, North Dakota State University, Fargo, ND 58102, USA ; 2 Master of Public Health Program, North Dakota State University, Fargo, ND, USA ; 3 Clinical Exercise Physiology Program, Human Performance Laboratory, Ball State University, Muncie, IN 47306, USA ; 4 Cardiopulmonary Rehabilitation Program, Indiana University Health - Ball Memorial Hospital, Muncie, IN, USA ; 5 Department of Kinesiology, University of Wisconsin-Milwaukee, Milwaukee, WI, USA ; 6 Center for Aging and Translational Research, University of Wisconsin-Milwaukee, Milwaukee, WI, USA.
authors.forename: Leonard
authors.initials: L
authors.lastname: Kaminsky
keywords: Cardiac rehabilitation; coronary heart disease (CHD); correlates; physical activity (PA)