Browsing by Author "Maksimović, M. (13613612200)"

Physical inactivity is one of the key health risk factors, directly related to both the increase in prevalence of noncommunicable diseases and to the reduction in work ability and functional capacity in the general population. Another result of reduced physical activity is noticeable in the emerging pandemic of obesity. The main aim of this study was to define relations between physical activity and/or exercise, and characteristics of body composition in working-age population of both genders living in Belgrade, the capital city of Serbia. The sample included 4489 apparently healthy Serbian males (N = 3065) and females (N = 1424) aged 18 to 69.9 years. The total sample was divided into four groups with respect to the frequency of physical activity or exercise: Group 1 - Sedentary, with subjects who performed ≤ 1 exercise/physical activity sessions/week; Group 2 - Casual, with subjects who performed 2-3 exercise/physical activity sessions/week; Group 3 - Committed, with subjects who performed 4-5 exercise/physical activity sessions/week; and, Group 4 - Steady, with subjects who performed ≥6 exercise/physical activity sessions/week). Body composition was measured via multisegmental bioelectrical impedance analysis using InBody 720 Tetrapolar 8-Point Tactile Electrode System. The research study used eight variables to describe the body composition of the sample: body height (BH), body mass (BM); body mass index (BMI); fat free mass (FFM); body fat mass (BFM); percent of body fat (PBF); fat free mass index (FFMI); and, body fat mass index (BFMI). MANOVA, ANOVA and t-test were used to establish the differences among groups, while linear regression analysis was used to define the trends of change. The results obtained suggest that an increase in physical activity and exercise had positive effects on body structure. The results showed a greater impact of physical activity/exercise on the change in body composition in men than in women, with the average change trend in all variables in men higher by 27.04%, ranging between 5.35% in FFM to 59.07% in BM. Finally, the results may indicate that the minimal frequency of physical activity/exercise should be at least four times per week in both men and women, with the duration of between 274 and 307 min of exercise/physical activity per week, i.e., between 60 and 67 min of exercise/physical activity per session. © 2016 by Nova Science Publishers, Inc. All rights reserved.

Physical inactivity is one of the key health risk factors, directly related to both the increase in prevalence of noncommunicable diseases and to the reduction in work ability and functional capacity in the general population. Another result of reduced physical activity is noticeable in the emerging pandemic of obesity. The main aim of this study was to define relations between physical activity and/or exercise, and characteristics of body composition in working-age population of both genders living in Belgrade, the capital city of Serbia. The sample included 4489 apparently healthy Serbian males (N = 3065) and females (N = 1424) aged 18 to 69.9 years. The total sample was divided into four groups with respect to the frequency of physical activity or exercise: Group 1 - Sedentary, with subjects who performed ≤ 1 exercise/physical activity sessions/week; Group 2 - Casual, with subjects who performed 2-3 exercise/physical activity sessions/week; Group 3 - Committed, with subjects who performed 4-5 exercise/physical activity sessions/week; and, Group 4 - Steady, with subjects who performed ≥6 exercise/physical activity sessions/week). Body composition was measured via multisegmental bioelectrical impedance analysis using InBody 720 Tetrapolar 8-Point Tactile Electrode System. The research study used eight variables to describe the body composition of the sample: body height (BH), body mass (BM); body mass index (BMI); fat free mass (FFM); body fat mass (BFM); percent of body fat (PBF); fat free mass index (FFMI); and, body fat mass index (BFMI). MANOVA, ANOVA and t-test were used to establish the differences among groups, while linear regression analysis was used to define the trends of change. The results obtained suggest that an increase in physical activity and exercise had positive effects on body structure. The results showed a greater impact of physical activity/exercise on the change in body composition in men than in women, with the average change trend in all variables in men higher by 27.04%, ranging between 5.35% in FFM to 59.07% in BM. Finally, the results may indicate that the minimal frequency of physical activity/exercise should be at least four times per week in both men and women, with the duration of between 274 and 307 min of exercise/physical activity per week, i.e., between 60 and 67 min of exercise/physical activity per session. © 2016 by Nova Science Publishers, Inc. All rights reserved.

Objectives: The pathogenesis of venous ulceration is not completely understood. The aim of this research was to measure and compare various parameters in ulcers caused by abnormalities in superficial venous (SU) versus deep venous flow (DU), to determine possible differences in their pathogenesis. Methods: Analysis of venous blood gases and levels of anaerobic metabolites from the ulcer site were measured in SU (n=8) and DU patients (n=8) and compared with control samples from the contralateral healthy limb. Histological examination via electron microscopy was also performed in tissue samples from the ulcer sites in SU (n=2) and DU (n=2) patients. Results: The SU group had significantly lower values of partial oxygen pressure (pO 2) and oxygen saturation (sO 2), and significantly higher values of partial pressure of carbon dioxide, bicarbonate concentration and total carbon dioxide versus control samples. The DU group had significantly higher values of pO 2 and sO 2 versus controls. Elevated levels of pyruvate (P <0.01) and lactate (P <0.05) were found in DU ulcer blood samples taken after 30 min of passive standing (static shear), as compared with control blood samples. However, no significant histological differences between SU and DU samples could be distinguished via electron microscopy. Conclusions: Differences in levels of venous blood gases and anaerobic metabolites indicate a potential difference in the causation and development of superficial versus deep venous caused ulcers. This may have clinical significance for the diagnosis and treatment of these conditions. © 2007 Royal Society of Medicine Press.