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      Do Short Spurts of Physical Activity Benefit Cardiovascular Health? The CARDIA Study

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          Abstract

          Background

          For optimal health benefits moderate to vigorous intensity physical activity (MVPA) is recommended in sustained bouts lasting ≥ 10 minutes. However, short spurts of MVPA lasting < 10 minutes are more common in everyday life. It is unclear whether short spurts of MVPA further protect against the development of hypertension and obesity in middle-aged adults beyond bouted MVPA.

          Methods

          Objectively measured physical activity was collected in the Coronary Artery Risk Development in Young Adults (CARDIA) study at the 20-year (2005–2006) examination, and blood pressure and BMI were collected at the 20-year and 25-year (2010–2011) examinations. Time spent in MVPA was classified as either bouted MVPA, i.e., ≥ 10 continuous minutes or short spurts of MVPA, i.e., < 10 continuous minutes. To examine the association of short spurts of MVPA with incident hypertension and obesity over five years, we calculated risk ratios (RR) adjusted for bouted MVPA and potential confounders.

          Results

          Among 1,531 and 1,251 participants without hypertension and obesity, respectively at Year 20 (Age 45.2 ±3.6, 57.3% Women, BMI 29.0 ± 7.0), 14.8% and 12.1% developed hypertension and obesity by Year 25. Study participants in the highest tertile of short spurts of MVPA were 31% less likely to develop hypertension 5 years later (RR=0.69 [0.49, 0.96]) compared with those in the lowest tertile. There was no statistically significant association of short spurts of MVPA with incident obesity.

          Conclusion

          These findings support the notion that accumulating short spurts of MVPA protects against the development of hypertension, but not obesity in middle-aged adults.

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          Author and article information

          Journal
          8005433
          5723
          Med Sci Sports Exerc
          Med Sci Sports Exerc
          Medicine and science in sports and exercise
          0195-9131
          1530-0315
          9 April 2015
          November 2015
          01 November 2016
          : 47
          : 11
          : 2353-2358
          Affiliations
          [1 ]Department of Physical Therapy, University of Delaware, Newark, DE
          [2 ]The University of Texas Health Science Center at Houston, School of Public Health – Austin Regional Campus, Austin, TX
          [3 ]University of Alabama at Birmingham, Birmingham, AL
          [4 ]Kaiser Permanente Northern California, Division of Research, Oakland, CA
          Author notes
          Corresponding author: Daniel K. White, STAR Health Sciences Complex, 540 S. College Ave, Suite 210L, Newark, DE 19713, Ph: (302) 831-7607, fax: (302) 831-4234, dkw@ 123456udel.edu
          Article
          PMC4573767 PMC4573767 4573767 nihpa671067
          10.1249/MSS.0000000000000662
          4573767
          25785930
          Categories
          Article

          hypertension, Physical activity, cohort study, obesity

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