to investigate the effect of two dietary levels of l-carnitine and vegetable fat powder on the quality of cockerels' sperm and broiler breeder fertility and hatchability. two hundred and fifty female and twenty five male broiler breeders. were studied classic hubbard parent stocks were randomly distributed in five groups of 50 with five replicates of 10 females and one male. two levels of ...

PURPOSE Little is known about the potential role of lifestyle factors in sex differences in insulin resistance in late elementary school children. METHODS In this cross-sectional study, we compared sex differences in Tanner scales, body fat, physical activity (PA) and fitness, and insulin resistance markers in elementary school children (boys, n = 69 and girls, n = 81) aged 12-13 years. Body ...

Morbid obesity is often associated with cardiac dilatation and left ventricular dysfunction. The present study investigated whether a similar relationship exists between mild and moderate obesity and left ventricular reserve function in 28 middle aged and older men (58.6 +/- 6.1 years, mean +/- SD). Subjects had a body mass index of 26.4 +/- 2.9 kg/m2, a percent body fat determined by hydrodens...

UNLABELLED Limited data on sex differences in body composition changes in response to higher protein diets (PRO) compared to higher carbohydrate diets (CARB) suggest that a PRO diet helps preserve lean mass (LM) in women more so than in men. OBJECTIVE To compare male and female body composition responses to weight loss diets differing in macronutrient content. DESIGN Twelve month randomized...

Foods high in dietary fiber may play an important role in regulating body weight. Few observational studies have examined the relationship between dietary fiber from different sources and body fat in older adults. Our objectives were to examine the associations among grain intake (whole and refined), dietary fiber and fiber sources, and body fat among older adults. We used data from 434 free-li...

A hypercoagulable state is a potential mechanism linking elevated blood pressure (BP), adiposity and a sedentary lifestyle to development of coronary heart disease (CHD). We examined relationships among aerobic fitness and adiposity in 76 sedentary subjects with elevated BP. Blood levels of plasminogen activator inhibitor-1 (PAI-1), D-dimer, von Willebrand factor (vWF) and thrombomodulin were a...

BACKGROUND The aim of this study was to determine if oral contraceptive (OC) use affects body weight, body composition and metabolism in primates. METHODS Reproductive-age female rhesus monkeys of normal and obese BMI were studied to document baseline weight stability, then treated continuously with an OC (dosed to achieve equivalent human serum levels for a 30 µg ethinyl estradiol/150 µg lev...

BACKGROUND This observational study examined cross-sectional and 24-month longitudinal associations of physical activity and dietary behaviors with change in BMI and percent body fat among children aged 6–9 years old. METHODS Data were from the control group (n = 271; 48% Latino) of a community-based childhood obesity prevention program. Assessments were conducted at baseline and at 24 months...

OBJECTIVE To determine whether plasma aldosterone (PA) levels differed between African American and White prehypertensives and if so, could the difference be explained by ethnicity-related variability in urinary K+ and Na+ excretion, body mass index (BMI), and percent body fat. DESIGN Ethnic comparison SETTING The University of Maryland College Park and the University of Maryland School of ...