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- Title
Relationships between insulin sensitivity, skeletal muscle mass and muscle quality in obese adolescent boys.
- Authors
Lee, S; Kim, Y; White, D A; Kuk, J L; Arslanian, S
- Abstract
We examined the relationships between insulin sensitivity (IS), skeletal muscle (SM) mass and SM quality in youth. Forty obese adolescent boys (body mass index 95th percentile, 12-18 years) participated in this study. IS and glucose tolerance was measured by a 3 h hyperinsulinemic−euglycemic clamp and a 2 h oral glucose tolerance test (OGTT), total SM mass and intermusular adipose tissue (IMAT) by whole-body magnetic resonance imaging, and muscular strength by one-repetition maximum leg and bench press. IMAT was associated (P<0.05) with IS (r=−0.53) and OGTT-insulin area under the curve (AUC; r=0.31). Similarly, muscular strength was associated (P<0.05) with both IS (r=0.39) and OGTT-insulin AUC (r=−0.32). By contrast, total SM mass was not associated with IS or any OGTT parameters (P>0.1). After accounting for race and tanner stage, IMAT and muscular strength remained significantly associated with IS, together explaining a total of 41% of the variance in IS. Our findings suggest that SM quality, but not SM mass, is associated with IS in obese adolescent boys.
- Subjects
INSULIN resistance; SENSITIVITY analysis; SKELETAL muscle; ADOLESCENT obesity; MUSCLE strength; WHOLE body imaging; EXERCISE physiology; ANALYSIS of variance
- Publication
European Journal of Clinical Nutrition, 2012, Vol 66, Issue 12, p1366
- ISSN
0954-3007
- Publication type
Article
- DOI
10.1038/ejcn.2012.142