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Objective Obesity is associated with kidney defects. Physical activity is a key element in the treatment of obesity. The aim of this study was to compare the effect of endurance and endurance-strength training on kidney function in abdominally obese women. Methods Forty-four abdominally obese women were randomized to endurance training or endurance-strength training, three times a week for 3 months. Before and after the intervention, kidney function was assessed by measuring blood creatinine, urine creatinine, and urine albumin levels, and the albumin-to-creatinine ratio and glomerular filtration rate (GFR) were calculated. Results Renal hyperperfusion was present in both groups before the study. Following both types of physical activity, similar modifications of the investigated parameters were observed, but with no significant between-group differences. Both courses of training led to a significant increase in blood creatinine and a subsequent decrease in the GFR. A significant increase in urine creatinine and album levels, though not exceeding the range for microalbuminuria, was not accompanied by any difference in the albumin-to-creatinine ratio after endurance-strength training alone. Conclusion Three months of either endurance or endurance-strength training has a favorable and comparable effect on renal function in abdominally obese women with renal hyperfiltration. [ABSTRACT FROM AUTHOR]

The aim of study was to investigate the association between oxidative stress and anthropometric and metabolic parameters in middle-aged, overweight or obese women. Venous blood samples were taken from each subject after an overnight fast, and the following parameters were assessed: plasma total antioxidant status (TAS), plasma concentrations of thiobarbituric acid reactive substances (TBARS), serum levels of antibodies against oxidized low density lipoproteins (oLAB), serum lipid profiles, and serum glucose and insulin concentrations. Additionally, serum low density lipoprotein (LDL) cholesterol and insulin resistance indices and atherogenic index of plasma (AIP) were calculated. Correlations were noted between plasma thiobarbituric reactive substances (TBARS), antibodies to oxidized LDL (oLAB), and total antioxidant status (TAS); and blood pressure (BP), insulin resistance parameters and lipids profile. The levels of antibodies to oxidatively modified low-density lipoproteins oLAB correlated with systolic and diastolic BP, TAS correlated negatively with the atherogenic index of plasma (AIP). An association was found between oxidative stress and BP, and lipid risk factors in obese and overweight women. [ABSTRACT FROM AUTHOR]

The aim of the study was to investigate changes in blood melatonin concentration in volleyball players after performing an exercise of moderate intensity (test PWC170) and of intensity increasing to the maximum. The sample consisted of eleven volleyball players from the UKS "Budowlanka" Poznań sport club, aged between 15 and 17 years old (mean age 16.0±0.45). Tests and measurements were carried out between 8 a.m. and 11 a.m. The exercise test of an intensity increasing to the maximum induced significant disturbances (at 1% confidence level) in the acid-base balance. The pH value declined from 7.38±0.01 to 7.23±0.03, pCO2 by 8 mmHg, and the bicarbonates by 10 mmHg. The base deficit was increased from 0.48±1.03 to 12.40±1.78 mmol/l. The lactic acid concentration was increased by 7.7 mmol/l. The aerobic exercise (PWC170) induced a decrease in blood pH from 7.37±0.01 to 7.34±0.02, a decrease in bicarbonates by 1.84 mmol/l, and the base deficit by 2.1 mmol/l (p<0.01). The concentration of the lactic acid increased from 1.22±0.23 to 2.07±0.72 mmol/l (p<0.01). The concentration of melatonin in the blood serum after exercise of an intensity increasing to the maximum was higher by 3.4 pg/ml (p<0.05), and after the PWC170 test was lower by 7.3 pg/ml (p<0.05). In conclusion, a single physical exercise, depending on its intensity, causes diverse changes in blood melatonin concentration. [ABSTRACT FROM AUTHOR]