Page 73 - 《运动与健康科学》(英文)2024年第2期

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Journal of Sport and Health Science 13 (2024) 195203

Original article

TaggedH1Association of daily sitting time and leisure-time physical activity

with body fat among U.S. adultsTaggedEnd
c
f
TaggedPJingwen Liao a,b,y, *, Min Hu a,y , Kellie Imm , Clifton J. Holmes d,e , Jie Zhu ,
Chao Cao d,e , Lin Yang g,h TaggedEnd
a
TaggedP Guangdong Provincial Key Laboratory of Physical Activity and Health Promotion, Guangzhou Sport University, Guangzhou 510500, China
b
Scientific Research Center, Guangzhou Sport University, Guangzhou 510500, China
c
Division of Epidemiology & Genetics, Department of Population and Public Health Sciences, Keck School of Medicine of the University of Southern California,
Los Angeles, CA 90033, USA
d
Program in Physical Therapy, Washington University School of Medicine, St. Louis, MO 63110, USA
e
Center for Human Nutrition, Washington University School of Medicine, St. Louis, MO 63110, USA
f
Department of Plastic and Reconstructive Surgery, Shanghai East Hospital, Tongji University, Shanghai 200070, China
g
Department of Cancer Epidemiology and Prevention Research, Alberta Health Services, Calgary T2S 3C3, Canada
h
Department of Oncology and Community Health Sciences, University of Calgary, Calgary T2N 1N4, Canada
TaggedEnd Received 13 May 2022; revised 21 July 2022; accepted 25 August 2022
Available online 12 October 2022
2095-2546/Ó 2024 Published by Elsevier B.V. on behalf of Shanghai University of Sport. This is an open access article under the CC BY-NC-ND license.
(http://creativecommons.org/licenses/by-nc-nd/4.0/)
TaggedPAbstract
Background: Prolonged sitting and reduced physical activity lead to low energy expenditures. However, little is known about the joint impact of
daily sitting time and physical activity on body fat distribution. We investigated the independent and joint associations of daily sitting time and
physical activity with body fat among adults.
Methods: This was a cross-sectional analysis of U.S. nationally representative data from the National Health and Nutrition Examination Survey
20112018 among adults aged 20 years or older. Daily sitting time and leisure-time physical activity (LTPA) were self-reported using the
Global Physical Activity Questionnaire. Body fat (total and trunk fat percentage) was determined via dual X-ray absorptiometry.
Results: Among 10,808 adults, about 54.6% spent 6 h/day or more sitting; more than one-half reported no LTPA (inactive) or less than 150 min/week
LTPA (insufficiently active) with only 43.3% reported 150 min/week or more LTPA (active) in the past week. After fully adjusting for sociodemo-
graphic data, lifestyle behaviors, and chronic conditions, prolonged sitting time and low levels of LTPA were associated with higher total and trunk fat
percentages in both sexes. When stratifying by LTPA, the association between daily sitting time and body fat appeared to be stronger in those who
were inactive/insufficiently active. In the joint analyses, inactive/insufficiently active adults who reported sitting more than 8 h/day had the highest total
(female: 3.99% (95% confidence interval (95%CI): 3.09%4.88%); male: 3.79% (95%CI: 2.75%4.82%)) and trunk body fat percentages (female:
4.21% (95%CI: 3.09%5.32%); male: 4.07% (95%CI: 2.95%5.19%)) when compared with those who were active and sitting less than 4 h/day.
Conclusion: Prolonged daily sitting time was associated with increased body fat among U.S. adults. The higher body fat associated with 6 h/day
sitting may not be offset by achieving recommended levels of physical activity.

TaggedPKeywords: Adults; Body fat distribution; Physical activity; Sitting timeTaggedEnd

is becoming increasingly prevalent in the population and is
TaggedH11. IntroductionTaggedEnd
2
associated with a range of negative health effects. TaggedEnd
TaggedPSedentary behavior, which is defined as any waking
TaggedPEmerging evidence from large-scale epidemiologic studies
behavior with energy expenditure 1.5 metabolic equivalents or has suggested an association of sedentary behaviors, particularly
fewer that is performed in a sitting, reclining, or lying posture, 1
prolonged sitting time, with higher risks of cardiovascular disease
3 4 59
(CVD), diabetes, cancer, and overall mortality, independent
TaggedEndTaggedEnd Peer review under responsibility of Shanghai University of Sport. of physical activity levels. In a recent population-based study,
TaggedEnd* Corresponding author.
E-mail address: liaojw@gzsport.edu.cn (J. Liao). prolonged sitting time was associated with higher risks of CVD
y
TaggedEnd These two authors contributed equally to this work. andpremature deathin21low-tohigh-income countries, with
https://doi.org/10.1016/j.jshs.2022.10.001
Cite this article: Liao J, Hu M, Imm K, et al. Association of daily sitting time and leisure-time physical activity with body fat among U.S. adults.
J Sport Health Sci 2024;13:195203.