Physical Activity and C-reactive Protein Levels: The Confounding Role of Body Fat

Background:This study investigated the relationship between objectively-measured total physical activity (PA), and intensity of PA and high-sensitivity C-reactive protein (CRP) in 211 healthy, middle-age women (43.1 ± 3.0 y). In addition, this study examined the extent to which age, BMI, abdominal circumference, and body fat percentage operated as confounders in these associations.Methods:PA was objectively measured for 7 continuous days using accelerometry. Fasting blood samples were taken, from which CRP was measured using a solid phase ELISA. Body mass index (BMI) (kg/m2), abdominal circumference measured at the umbilicus, and body fat percentage using air displacement plethysmography, were assessed.Results:Total PA (activity counts) was significantly and inversely related to CRP concentrations (F = 7.76, P = .006) as was vigorous-intensity PA. After adjusting for differences in body fat percentage, total PA and vigorous-intensity PA were no longer significant predictors of CRP. Abdominal circumference and BMI also tended to weaken the relationship between total or vigorous-intensity PA and CRP but not to the same extent as body fat percentage.Conclusions:These findings suggest that higher total and vigorous-intensity PA levels are significantly related to lower CRP levels in healthy, middle-age women; however, this relationship is largely a function of differences in body fat percentage.

Download Full-text

THE ASSOCIATION BETWEEN OBJECTIVELY MEASURED INTENSITY OF PHYSICAL ACTIVITY AND BODY FAT PERCENTAGE IN 278 MIDDLE-AGE WOMEN

Medicine & Science in Sports & Exercise ◽

10.1097/00005768-200105001-01724 ◽

2001 ◽

Vol 33 (5) ◽

pp. S305

Author(s):

T R. Peterson ◽

L A. Tucker

Keyword(s):

Physical Activity ◽

Body Fat ◽

Middle Age ◽

Body Fat Percentage ◽

Fat Percentage ◽

Measured Intensity ◽

Objectively Measured

Download Full-text

Examining the Relationship Between Physical Activity Intensity and Adiposity in Young Women

Journal of Physical Activity and Health ◽

10.1123/jpah.2013-0441 ◽

2015 ◽

Vol 12 (6) ◽

pp. 764-769 ◽

Cited By ~ 3

Author(s):

Bruce W. Bailey ◽

Pamela Borup ◽

James D. LeCheminant ◽

Larry A. Tucker ◽

Jacob Bromley

Keyword(s):

Physical Activity ◽

Body Composition ◽

Body Fat ◽

Young Women ◽

Physical Activity Intensity ◽

Fat Percentage ◽

Bod Pod ◽

Activity Intensity ◽

Objectively Measured ◽

The Relationship

Background:The purpose of this study was to assess the relationship between intensity of physical activity (PA) and body composition in 343 young women.Methods:Physical activity was objectively measured using accelerometers worn for 7 days in women 17 to 25 years. Body composition was assessed using the BOD POD.Results:Young women who spent less than 30 minutes a week performing vigorous PA had significantly higher body fat percentages than women who performed more than 30 minutes of vigorous PA per week (F = 4.54, P = .0113). Young women who spent less than 30 minutes per day in moderate to vigorous PA (MVPA) had significantly higher body fat percentages than those who obtained more than 30 minutes per day of MVPA (F = 7.47, P = .0066). Accumulating more than 90 minutes of MVPA per day was associated with the lowest percent body fat. For every 10 minutes spent in MVPA per day, the odds of having a body fat percentage above 32% decreased by 29% (P = .0002).Conclusion:Vigorous PA and MVPA are associated with lower adiposity. Young women should be encouraged to accumulate at least 30 minutes of MVPA per day, however getting more than 90 minutes a day is predictive of even lower levels of adiposity.

Download Full-text

Accelerometer-determined peak cadence and weight status in children from São Caetano do Sul, Brazil

Ciência & Saúde Coletiva ◽

10.1590/1413-812320172211.21962015 ◽

2017 ◽

Vol 22 (11) ◽

pp. 3689-3698

Author(s):

Gerson Luis de Moraes Ferrari ◽

Timóteo Araújo ◽

Luis Carlos Oliveira ◽

Victor Keihan Rodrigues Matsudo ◽

Emily Mire ◽

...

Keyword(s):

Body Mass Index ◽

Body Fat ◽

Weight Status ◽

Bioelectrical Impedance ◽

Normal Weight ◽

Body Fat Percentage ◽

Obese Children ◽

Fat Percentage ◽

The Relationship ◽

Brazilian Children

Abstract The purpose of this study was to determine the relationship between peak cadence indicators and body mass index (BMI) and body fat percentage (BF%)-defined weight status in children. The sample comprised 485 Brazilian children. Minute-by-minute step data from accelerometry were rank ordered for each day to identify the peak 1-minute, 30-minute and 60-minute cadence values. Data were described by BMI–defined and bioelectrical impedance-determined BF% weight status. BMI-defined normal weight children had higher peak 1-minute (115.5 versus 110.6 and 106.6 steps/min), 30-minute (81.0 versus 77.5 and 74.0 steps/min) and 60-minute cadence (67.1 versus 63.4 and 60.7 steps/min) than overweight and obese children (p<.0001), respectively. Defined using %BF, normal weight children had higher peak 1-minute (114.5 versus 106.1 steps/min), 30-minute (80.4 versus 73.1 steps/min) and 60-minute cadence (66.5 versus 59.9 steps/min) than obese children (p<.0001). Similar relationships were observed in boys; however, only peak 1- minute cadence differed significantly across BMI and %BF-defined weight status categories in girls. Peak cadence indicators were negatively associated with BMI and BF% in these schoolchildren and significantly higher among normal weight compared to overweight or obese children.

Download Full-text

The relationship between thyroid hormone and lipid metabolism/body fat content in euthyroid male patients with type 2 diabetes mellitus in China: A cross-sectional study

10.21203/rs.2.24853/v1 ◽

2020 ◽

Author(s):

Xia Sun ◽

Liping Chen ◽

Rongzhen Wu ◽

Dan Zhang ◽

Yinhui He

Keyword(s):

Body Fat ◽

Visceral Fat ◽

Fat Content ◽

Body Fat Percentage ◽

Fat Percentage ◽

Body Fat Content ◽

Male Patients ◽

The Relationship ◽

Visceral Fat Content

Abstract Background: This study compared the relationship between thyroid hormones and lipid metabolism/body fat content in euthyroid male patients with type 2 diabetes mellitus (T2DM) in China. Methods: A total of 64 male patients who were diagnosed as T2DM and 64 non-diabetic males who underwent health examination were matched according to age at a 1:1 ratio. Results: The 32 subjects in each sub-group showed differences in age, body mass index (BMI), mean arterial pressure, waist circumference, visceral fat content, body fat percentage, HbA1c, HOMA-IR, FT3, TSH, HDL-c, adiponectin, leptin, visfatin and TNF-α (all P < 0.05). In the overall population, FT3 was positively correlated with body fat percentage (r=0.21, P=0.02), and negatively correlated with HOMA-IR (r=-0.18, P=0.04) and visfatin (r=-0.47, P <0.01); TSH was positively correlated with body fat percentage (r=0.23, P=0.01). In the T2DM-OB group FT3 was positively correlated with BMI (r=0.45, P <0.05), visceral fat content (r=0.50, P <0.05), and body fat percentage (r=0.44, P <0.05); FT4 was positively correlated with visceral fat content (r=0.38, P <0.05); and TSH was positively correlated with HOMA-IR (r=0.39, P <0.05). Conclusion: TSH increased in obese people and FT3 was lower in patients with T2DM.

Download Full-text

Vigorous-Intensity Physical Activities Are Associated with High Brown Adipose Tissue Density in Humans

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph17082796 ◽

2020 ◽

Vol 17 (8) ◽

pp. 2796

Author(s):

Riki Tanaka ◽

Sayuri Fuse ◽

Miyuki Kuroiwa ◽

Shiho Amagasa ◽

Tasuki Endo ◽

...

Keyword(s):

Physical Activity ◽

Adipose Tissue ◽

Body Fat ◽

Physical Activities ◽

Body Fat Percentage ◽

Activity Levels ◽

Fat Percentage ◽

Brown Adipose ◽

Physical Activity Levels ◽

Vigorous Intensity

Brown adipose tissue (BAT) plays a role in adaptive thermogenesis in response to cold environments and dietary intake via sympathetic nervous system (SNS) activation. It is unclear whether physical activity increases BAT density (BAT-d). Two-hundred ninety-eight participants (age: 41.2 ± 12.1 (mean ± standard deviation), height: 163.6 ± 8.3 cm, weight: 60.2 ± 11.0 kg, body mass index (BMI): 22.4 ± 3.0 kg/m2, body fat percentage: 25.4 ± 7.5%) without smoking habits were categorized based on their physical activity levels (a group performing physical activities including walking and moderate physical activity (WM) and a group performing WM + vigorous-intensity physical activities (VWM)). We measured the total hemoglobin concentration ([Total-Hb]) in the supraclavicular region, an index of BAT-d, and anthropometric parameters. [Total-Hb] was significantly higher in VWM than WM for all participant groups presumably owing to SNS activation during vigorous-intensity physical activities, and unrelated to the amount of total physical activity levels. Furthermore, multiple regression analysis revealed that BAT-d was related to visceral fat area and VWM in men and related to body fat percentage in women. We conclude that vigorous-intensity physical activities are associated with high BAT-d in humans, especially in men.

Download Full-text