Body composition and energy intake — skeletal muscle mass is the strongest predictor of food intake in obese adolescents: The HEARTY trial
Summary (1 min read)
Introduction
- Running Title: Body composition and energy intake in obese adolescents Trial Registration: ClinicalTrials.
- Applied Physiology, Nutrition, and Metabolism Draft 2 Abstract Purpose:.
- It was hypothesized that resting metabolic rate (RMR) and skeletal muscle mass would be the strongest predictors of EI in a sample of overweight and obese adolescents.
2.1 Subjects
- The educational level of parents of most participants was high, with 78% of mothers and 67% of fathers having completed some university or community college.
- This study received approval from the Research Ethics Boards at the Children’s Hospital of Eastern Ontario (protocol #05/04E) and the Ottawa Hospital Research Institute (protocol #2004219-01H).
2.2. Design and Procedure
- For the baseline assessments the research coordinator performed a complete medical, drug, and physical activity history as well as a physical examination.
- All participants and the individuals in their households most involved in food preparation attended an initial visit with the dietitian to discuss weight and diet history, fast food consumption and current eating habits.
- Body weight, height, waist circumference, body composition and RMR were also measured.
- Total skeletal muscle mass is defined by fat-free skeletal muscle due to the absence of intramuscular fat included in the calculation.
- Under the supervision of a registered dietitian, energy intake was assessed using 3-day self-reported food logs.
3. Results
- Participant characteristics are reported in Table 1.
- The authors primary hypothesis was partially confirmed in that skeletal muscle mass was the strongest predictor of energy intake even after adjustment for age, sex, height, and physical activity levels, whereas RMR was not significantly related to energy intake under these same adjustments .
- Taken together, the authors demonstrate that, similar to several other studies of adults (Blundell et al.
- Outside of these intervention points it is understood that at the low(ered) end of body fatness leptin signaling stimulates food intake and reduces energy expenditure, whereas, the opposite effects on feeding and energy expenditure are noted with high(er) body fatness, albeit to a lesser extent.
7. References
- Applied Physiology, Nutrition, and Metabolism Draft 21 appetite in obese individuals.
- Linear regression analysis demonstrating the independent associations between subjects’ characteristics (independent variables) and energy intake (dependent variables), presented unadjusted and adjusted for age, sex, height, and physical activity.
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"Body composition and energy intake ..." refers background in this paper
...The fact that 32% of North American youth are either overweight or obese (Ogden et al. 2014; Roberts et al. 2012) indicates that there is still a need to understand not only the behavioral factors involved in the act of eating, but also the physiological signals that promote feeding and…...
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...The fact that 32% of North American youth are either overweight or obese (Ogden et al. 2014; Roberts et al. 2012) indicates that there is still a need to understand not only the behavioral factors involved in the act of eating, but also the physiological signals that promote feeding and overconsumption....
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...The Weir formula was used for the calculation of RMR (Weir 1949)....
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"Body composition and energy intake ..." refers background in this paper
...Although the cross-talk of peripheral tissues and organs with specific brain centers has been described in great detail in relation to appetite and body weight regulation (Berthoud 2004; Morton et al. 2006), there are still many questions that remain unanswered....
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