Wednesday, Mar 23, 2011, 10:30 AM -12:00 PM
Association of Compliance with National Physical Activity Guidelines with CVD Risk Factors: Assessment Using Accelerometry in The Framingham Study
Atrium Ballroom A
Wednesday, Mar 23, 2011, 11:00 AM -11:15 AM
+NPAM - Physical Activity/Fitness
Physical activity; Risk factors; Obesity
Nicole L Glazer
, Boston Univ Sch of Med, Boston, MA; Asya Lyass, Framingham Heart Study, Framingham, MA; Dale W Esliger, Coll of Kinesiology, Univ of Saskatchewan, Saskatoon, SK, Canada; Susan J Blease, Framingham Heart Study, Framingham, MA; Joseph Massaro, Boston Univ Sch of Public Health, Boston, MA; Ramachandran S Vasan, Joanne M Murabito, Boston Univ Sch of Med, Boston, MA
Background. National guidelines recommend that adults get 150 minutes of moderate to vigorous physical activity (MVPA) per week; some guidelines also recommend that this activity be done in bouts of at least 10 minutes. This study describes the proportion of adults meeting these guidelines and the relations between compliance and CVD risk factors in a well-characterized, community-based cohort study of white adults.
Methods. We evaluated 2078 Third Generation Framingham Heart Study participants (mean age 47 years, 55% [1143 of 2078] women) who underwent objective assessment of MVPA by accelerometry over 5-7 days. Guideline compliance was defined two ways: >=150 minutes of MVPA done in bouts of >=10 minutes (MVPA10); and >=150 total MVPA regardless of bout time. We examined the cross-sectional association of guideline compliance with CVD risk factors using separate regression models for each definition (adjusted for age, sex and accelerometer wear time).
Results. Ten percent (208 of 2078) of the population met the guidelines of getting >=150 minutes of MVPA10; 53% (1092 of 2078) were compliant when considering total MVPA. Both compliance definitions were significantly associated with lower circulating triglycerides, lower BMI, higher HDL, and lower prevalence of obesity and overweight/obesity (P<0.01 for all, Table 1). Guideline compliance when considering total MVPA was also associated with significantly lower SBP, DBP, Framingham risk score and lower prevalence of hypertension, impaired glucose tolerance and diabetes; whereas compliance defined by MVPA10 was not.
Conclusions. Approximately half of our middle-aged population met the recommendation of at least 150 minutes of MVPA per week, but only 10% (208 of 2078) engaged in their activity in >=10 minute bouts. Guideline compliance significantly reduced the CVD risk factor burden regardless of whether the physical activity was done in bouts. Further study is needed to determine whether recommendations for MVPA in bouts >=10 minutes are necessary for CVD prevention.
F. Ownership Interest; Modest; owner, founder, and vendor of KineSoft, the acceleromter data analysis software used for the creation of the accelerometer outcome variables. G. Consultant/Advisory Board; Modest; stipendiary research collaborator with the FHS research team.
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