File(s) under permanent embargo
Breaking up prolonged sitting reduces resting blood pressure in overweight/obese adults
journal contribution
posted on 2014-09-01, 00:00 authored by R N Larsen, B A Kingwell, P Sethi, Ester Cerin, N Owen, David DunstanDavid DunstanAbstract
Aim:
To compare the effect of 7 h of prolonged sitting on resting blood pressure with asimilar duration of sitting combined with intermittent brief bouts of light-intensity or moderate-intensity physical activity.
Methods and results:
Overweight/obeseadults(nZ19;aged45 e65years) were recruited for a randomized three-treatment crossover trial with a one-week washout between treatments: 1) uninterrupted sitting; 2) sitting with 2 min bouts of light-intensity walking at 3.2 km/h every 20 min;and, 3) sitting with 2 min bouts of moderate-intensity walking at between 5.8 and 6.4 km/h every 20 min. After an initial 2 h period seated, participants consumed a test meal (75 g carbohydrate,50 g fat) and completed each condition over the next 5 h. Resting blood pressure was assessed oscillometrically every hour as a single measurement, 5 min prior to each activity bout. GEE models were adjusted for sex, age, BMI, fasting blood pressure and treatment order. After adjustment for potential confounding variables, breaking up prolonged sitting with lightand moderate-intensity activity breaks was associated with lower systolic blood pressure [light:120
1 mmHg (estimated marginal mean
SEM),
P
Z
0.002; moderate: 121
1 mmHg,
P
Z
0.02], compared to uninterrupted sitting (123
1 mmHg). Diastolic blood pressure was also
signi
fi
cantly lower during both of the activity conditions (light: 76
1 mmHg,
P
Z
0.006; moder-
ate: 77
1mmHg,
P
Z
0.03) compared to uninterrupted sitting (79
1 mmHg). No significant between-condition differences were observed in mean arterial pressure or heart rate.
Conclusion:
Regularly breaking up prolonged sitting may reduce systolic and diastolic blood pressure.
Aim:
To compare the effect of 7 h of prolonged sitting on resting blood pressure with asimilar duration of sitting combined with intermittent brief bouts of light-intensity or moderate-intensity physical activity.
Methods and results:
Overweight/obeseadults(nZ19;aged45 e65years) were recruited for a randomized three-treatment crossover trial with a one-week washout between treatments: 1) uninterrupted sitting; 2) sitting with 2 min bouts of light-intensity walking at 3.2 km/h every 20 min;and, 3) sitting with 2 min bouts of moderate-intensity walking at between 5.8 and 6.4 km/h every 20 min. After an initial 2 h period seated, participants consumed a test meal (75 g carbohydrate,50 g fat) and completed each condition over the next 5 h. Resting blood pressure was assessed oscillometrically every hour as a single measurement, 5 min prior to each activity bout. GEE models were adjusted for sex, age, BMI, fasting blood pressure and treatment order. After adjustment for potential confounding variables, breaking up prolonged sitting with lightand moderate-intensity activity breaks was associated with lower systolic blood pressure [light:120
1 mmHg (estimated marginal mean
SEM),
P
Z
0.002; moderate: 121
1 mmHg,
P
Z
0.02], compared to uninterrupted sitting (123
1 mmHg). Diastolic blood pressure was also
signi
fi
cantly lower during both of the activity conditions (light: 76
1 mmHg,
P
Z
0.006; moder-
ate: 77
1mmHg,
P
Z
0.03) compared to uninterrupted sitting (79
1 mmHg). No significant between-condition differences were observed in mean arterial pressure or heart rate.
Conclusion:
Regularly breaking up prolonged sitting may reduce systolic and diastolic blood pressure.
History
Journal
Nutrition, metabolism and cardiovascular diseasesVolume
24Issue
9Pagination
976 - 982Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
0939-4753eISSN
1590-3729Language
engPublication classification
C Journal article; C1 Refereed article in a scholarly journalCopyright notice
2014, ElsevierUsage metrics
Categories
No categories selectedKeywords
HypertensionObesityPhysical activitySedentary behaviorScience & TechnologyLife Sciences & BiomedicineCardiac & Cardiovascular SystemsEndocrinology & MetabolismNutrition & DieteticsCardiovascular System & CardiologyPHYSICAL-ACTIVITYMETABOLIC RISKSEDENTARY TIMEPUBLIC-HEALTHLIFE-STYLEEXERCISEWALKINGASSOCIATIONSPREVENTION
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC