Gender and race influence metabolic benefits of fitness in children: a cross-sectional study

International Journal of Pediatric Endocrinology

David B Allen¹  Jens C Eickhoff²  Aaron L Carrel¹  Vanessa A Curtis³ 

[1] Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA;Department of Biostatistics and Medical Informatics, University of Wisconsin, Madison, WI, USA;Department of Pediatrics, University of Iowa Carver College of Medicine, 200 Hawkins Drive, 2859 JPP, Iowa City, IO 52242-1083, USA

关键词: Insulin Resistance;    Cardiovascular Fitness;    Race;    Gender;   

Others  :  813578
DOI  :  10.1186/1687-9856-2012-4

 received in 2011-11-01, accepted in 2012-03-15,  发布年份 2012

【 摘 要 】

Background

Increasing obesity and poor cardiovascular fitness (CVF) contribute to higher rates of type 2 diabetes mellitus (T2DM) in children. While the relative contributions of fitness and body fat on development of insulin resistance (IR) in children and adolescents remains unresolved, gender- and race-specific differences likely exist in the degree to which CVF influences IR and risk for T2DM. Better understanding of how gender and race affect interactions between body fat, CVF, and metabolic health would be helpful in designing effective and targeted strategies to reduce obesity-associated disease risk. We evaluated whether metabolic benefits of fitness on reducing inflammation and insulin resistance (IR) are affected by gender and race.

Methods

This cross-sectional study included 203 healthy children (mean age 12.2 y, 50% male, 46% non-Hispanic white (NHW), 54% racially diverse (RD)). Fasting insulin, glucose, hsCRP, and adiponectin were measured; race was self-reported; cardiovascular fitness (CVF) was evaluated by the Progressive Aerobic Cardiovascular Endurance Run. Associations between inflammation and gender, race, and CVF were evaluated using analysis of covariance. Multivariate regression analysis identified independent predictors of IR.

Results

Fitness and inflammation were inversely related in both males and females (p < 0.01); this effect was marginally stronger in RD children (p = 0.06) and non-overweight males (p = 0.07). High BMI (p < 0.001), low fitness (p = 0.006), and (female) gender (p = 0.003) were independently associated with higher HOMA-IR. In males, BMI and fitness, but not race independently predicted HOMA-IR. In females, BMI and race, but not fitness independently predicted HOMA-IR.

Conclusions

In middle school children, the beneficial effects of fitness vary based on gender and race. High CVF has an enhanced anti-inflammatory effect in male and RD children. While BMI is the strongest predictor of IR in the study group as a whole, fitness is a significant predictor of IR only in males, and race is a significant predictor of IR only in females.

【 授权许可】

   
2012 Curtis et al; licensee BioMed Central Ltd.

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