Background: The Tissue Monitoring System (TMS) is an algorithm that estimates changes in body tissue from a series of daily weight measures. It is intended to provide people with a feedback of changes in their tissue weight so they may have a basis for estimating how much they would have to change their intake or expenditure to maintain their weight at a prescribed level. We tested the effectiveness of the TMS to prevent freshmen from gaining weight during their first semester in college. Methods: In two similar but independent studies (Fall 2002(Fall , 2003, female freshmen college students were given analog bathroom scales and instructed to weigh themselves each morning immediately after rising from bed, then e-mail their weight to our staff. After 7 days, a linear function was performed on the most recent 7 days of the weight-day function for each participant. In the first study, the slope of this function was e-mailed back to the participants. In the second study, the difference between last point and the original weight was determined, using linear regression techniques, converted to calories, and the information was e-mailed back to the participants. Control participants in both studies were weighed at the beginning and the end of the semester. Results: The untreated controls gained 3.170.51 kg and 2.070.65 kg, respectively (Po0.01 for both studies), whereas weight gain of the experimental groups was 0.170.99 kg and À0.8270.56 kg, values that were not significantly different than zero. Conclusions: The TMS appears to be an effective technique to help female college freshmen resist gaining weight in an environment that is conducive to weight gain. These results suggest that the TMS may be a useful method to help curb the slow increase in the prevalence of overweight and obesity that is characteristic of all industrialized societies.

This study examined the accuracy and reliability of the MedGraphics VO2000 (VO2000) portable metabolic system and the ParvoMedics TrueOne 2400 (TrueOne 2400) metabolic cart against the criterion Douglas bag (DB) method. Ten healthy males (age 20 +/- 1.7 years) had their gas exchange variables measured at rest and during cycling at 50, 100, 150, 200, and 250 W. Each stage was 10-12 min. For half of the stage gas exchange was measured with the DB and TrueOne 2400 simultaneously and for the other half of the stage gas exchange was measured with the VO2000. The testing was performed on two separate days and the order in which the equipment was used in each stage was randomized. Reliability between days for V (E) (CV 7.3-8.8%) was similar among devices, however, for VO2, and VCO2 the VO2000 (CV 14.2-15.8%) was less reliable compared to the DB (CV 5.3-6.0%) and TrueOne 2400 (CV 4.7-5.7%). The TrueOne 2400 was not significantly different from the DB at rest or any work rate for V (E), VO2, or VCO2 (P > or = 0.05). The VO2000 was significantly different from the DB for V (E) at 50-100 W, VO2 at rest and 100-250 W, and VCO2 at rest and 200-250 W (all, P < 0.05). The TrueOne 2400 provides accurate and reliable results for the measurement of gas exchange variables. The VO2000 portable metabolic system was less reliable for measuring VO2 and VCO2 and generally overestimates VO2 at most cycling work rates. Further research is needed to confirm the results found with the VO2000.

No abstract

Background Binge eating predisposes children to excessive weight gain. However, it is unknown if pediatric binge eating predicts other obesity-associated adverse health outcomes. Objective The objective of this study was to investigate the relationship between binge eating and metabolic syndrome (MetS) in children. Method Children 5–12 y at high risk for adult obesity, either because they were overweight/obese when first examined or because their parents were overweight/obese, were recruited from Washington, DC and its suburbs. Children completed a questionnaire assessment of binge eating at baseline and underwent measurements of MetS components at baseline and at a follow-up visit approximately 5 years later. Magnetic resonance imaging was used to measure visceral adipose tissue (VAT) in a subset. Results One hundred eighty children were studied between July, 1996 and August, 2010. Baseline self-reported binge eating presence was associated with a 5.33 greater odds of having MetS at follow-up (95% CI: 1.47, 19.27, p = 0.01). The association between binge eating and BMI only partially explained changes in MetS components: baseline binge eating predicted higher follow-up triglycerides, even after accounting for baseline triglycerides, baseline BMI, BMI change, sex, race, baseline age, and time in study (p = 0.05). Also, adjusting for baseline VAT and demographics, baseline binge eating predicted greater follow-up L2-3 VAT (p = 0.01). Discussion Children’s reports of binge eating predicted development of MetS, worsening triglycerides, and increased VAT. The excessive weight gain associated with children’s binge eating partly explained its adverse metabolic health outcomes. Reported binge eating may represent an early behavioral marker upon which to focus interventions for obesity and MetS.

Female rowers with depleted Fe stores who consumed supplemental Fe during training improved their Fe status and energetic EF during endurance exercise. These results are important for endurance athletes whose dietary patterns and physical training increase their risk of IDNA and suggest that Fe supplementation may maximize the benefits of endurance training.