1,721,067 research outputs found
Ecotypic variation of Imperatia cylindrica populations in Taiwan: II. Physiological and biochemical evidence
No full textFeasibility of the simultaneous ocular and cervical vestibular-evoked myogenic potentials in unilateral vestibular hypofunction. 120: 1699-1705
No full textRadiation enhanced hepatocellular carcinoma cell invasion with MMP-9 expression through PI3K/Akt/NF-kB signal transduction pathway
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Use of random amplified polymorphic DNA analysis and single-enzyme amplified fragment length plymorphism in molecular typing of Ornithobacterium rhinotracheale strains
No full textSynthesis and characterization of soluble poly(ether imide)s based on 2,2 ’-bis(4-aminophenoxy)-9,9 ’-spirobifluorene
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Effect of 2-month detraining on body composition and insulin sensitivity in young female dancers
No full text[[abstract]]Objective: To investigate the effect of 2-month detraining on body composition and glucose tolerance for female collegiate dancers. Design: Longitudinal study of dancers who stopped their regular training for 2 months. Subjects: 16 female collegiate dancers (age: 19.7 +/- 0.11 year, body mass index (BMI): 20.7 +/- 0.56 kg/m(2)). Measurements: BMI, waist-to-hip ratio (WHR), oral glucose tolerance test (OGTT), insulin response during OGTT, and blood lipids at baseline and after a 2-month detraining. Results: Glucose tolerance was not significantly affected by the detraining, but the fasted insulin and insulin levels during OGTT were significantly elevated. Fasted free fatty acid (FFA) and triglyceride levels were significantly elevated without change in cholesterol level. BMI was not significantly altered during this detraining period, but the waist circumference and WHR ratio were significantly elevated. Conclusion: Only a 2-month cessation of regular training in female dancers significantly elevated basal and postprandial insulin levels and triglycerides, and were associated with increased basal FFA. This result appears to be partly related to the increased central fatness but not body mass, indicating that the early development of obesity due to reduced physical activity may not necessarily reflect on weight status. A warning is thus warranted for those young women who depend on weight measurement for body fat status monitoring.[[note]]SC
Glucose tolerance and insulin sensitivity following an one-week volleyball competition
No full text[[abstract]]The purpose of the study was to compare glucose tolerance and insulin sensitivity between trained (TR) and competition (CP) states, in relation to cortisol and testosterone levels. Sixteen highly trained volleyball players voluntarily participated in this study. The first testing session (TR state) occurred I week before the start of national level volleyball CP, and the second testing session (CP state) occurred next morning after the 1-week CP. Fasted serum sample was used for measuring cortisol and testosterone. Subjects were then orally challenged with 75 g of glucose solution for determinations of oral glucose tolerance test (OGTT) and insulin response. Under both fasted and glucose challenged conditions, glucose levels of CP were not different from TR state, whereas insulin levels of CP were significantly elevated above TR (50 min: from 78.8 +/- 8.7 to 96.6 +/- 8.1 mu U/ml, P < 0.05; 80 min: from 62.8 +/- 7.0 to 82.0 +/- 7.3; P < 0.05). Muscle creatine kinase (CK) level in blood was significantly increased above TR, suggesting greater muscle damage by CP. Serum leptin level, percent fat mass, and body weight were not different between two states. CP significantly increased serum cortisol level without significantly change in testosterone level. The new finding of the study was that volleyball CP reduced the whole-body insulin sensitivity significantly compared to TR state. The greater level of insulin concentration under CP state appears to be associated with elevated serum cortisol level. Despites the benefit of increased physical activity on metabolic function is widely recognized, physiological stress associated with CP can result in attenuation of systemic insulin sensitivity compared TR state.[[note]]SC
Interactive effect of an acute bout of resistance exercise and dehydroepiandrosterone administration on glucose tolerance and serum lipids in middle-aged women
No full text[[abstract]]The present study determined the interactive effect of an acute bout of resistance exercise and dehydroepiandrosterone (DHEA) administration on glucose tolerance and serum lipids. Twenty middle-aged female subjects performed an acute bout of resistance exercise and were subsequently divided into two groups: placebo (age 40.7 +/- 2.0) and DHEA administered (age 39.0 +/- 2.7). Ten subjects who received DHEA (age 41.5 +/- 4.6) participated in a non-exercise control. DHEA (25 mg twice daily) or placebo was orally supplemented for 48 hours. Before exercise and 48 hours after the last exercise bout (14 hours after the last DHEA intake), an oral glucose tolerance test and an insulin concentration were determined. Levels of fasting serum cholesterol and triglyceride, tumor necrosis factor-alpha (TNF-alpha), creatine kinase (CK) were also measured. The DHEA administration significantly elevated the fasting dehydroepiandrosterone sulfate (DHEA-S) level by approximately 3-fold. Both acute resistance exercise and DHEA administration improved glucose tolerance, but no addictive effect was found. Furthermore, exercise and DHEA administration did not affect serum triglyceride and cholesterol levels, but both lipids were significantly lowered when DREA was given following exercise. Resistance exercise induced elevations in serum CK and TNF alpha levels, but these increases were attenuated by the DHEA administration. The new finding of this study was that post-exercise DHEA administration decreased serum triglycerides and cholesterol. This effect appeared to be associated with its TNF-a lowering action.[[note]]SC
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