Biomedical subjects

Ozcan Saygin

Publications and source records attributed to Ozcan Saygin.

4 recordsLinked to original sources

PubMed2006

Comparison of the effects of acute and regular exercise on intraocular pressure in Turkish athlete and sedentarians.

The aim of this study was to investigate the changes that take place in IOP in athletes and people leading sedentary lives subjected to aerobic and anaerobic exercise and how chronic exercise could affect these changes. The study included 20 sportsmen (Group 1), and 20 people leading sedentary lives (Group 2). The intensity of the exercise for both groups was determined according to the Karvonen protocol and executed as an aerobic exercise program involving running on a treadmill for 30 min. Subjects in both groups were subjected to anaerobic exercise according to the Wingate test protocol for 30 s. The intraocular pressure of all subjects before exercise and after aerobic and anaerobic exercise were measured. The IOP before and after exercise aerobic and anaerobic were evaluated by the Willcoxon test whereas the right and left IOP before exercise and after the aerobic and anaerobic exercise programs in both groups were evaluated using the Mann Whitney U test. p values of <.05 were considered significant. Significant differences were found when the pre-exercise and post-aerobic and anaerobic exercise IOPs of the groups were compared (p < .05). Comparison of the post-anaerobic and aerobic exercise revealed a fall in the IOPs of the subjects after the aerobic exercise (p < .01). In this study, exercise was found to lead to a fall in the IOP in both sportsmen and those leading sedentary lives with the fall less apparent under anaerobic conditions than under aerobic conditions. In conclusion, therefore, it can be said that in those with an increased intraocular pressure, regular, moderately intense aerobic exercise rather than short-lived intense exercise could be more useful.

Adult↗

PubMed2005

The effects of exercise on the immune system and stress hormones in sportswomen.

BACKGROUND: Despite the numerous studies controversial results exist in specific immune response to exercise. The aim of this study was to determining the differences in the humoral immune parameters, serum ACTH and cortisol levels existing between sportswomen and sedentary subjects and the effect of acute aerobic and anaerobic exercise on these parameters. MATERIALS/METHODS: 40 sportswomen (Groups 1 and 2) and 20 sedentary women (Group 3) were enrolled and Group 1 performed aerobic exercise on a treadmill for 30 minutes while the Group 2 was subjected to the Wingate effort test for 30 seconds. Before exercising (at 8.30 a.m), immediately after the exercise, and 4 hours, days 2 and 5 days after exercising blood samples were obtained and the levels of IgA, IgG, IgM, complement 3 (C3) and complement 4 (C4) were determined turbidometrically. RESULTS: Before exercise: the means of IgA and IgG values in the G1 and G2 groups were higher than the Group G3, and the mean cortisol levels in the sedentary group was significantly higher (p<0.05). After Exercise: Whereas the C3 and C4 levels decreased significantly at the end of the exercise in Group 1 and 2 (p<0.05), the IgA, IgG (p<0.05) and IgM levels (p<0.01) at the 4th and 5th determinations were observed to be significantly higher in only the Group 1. The cortisol and ACTH levels were found to have increased significantly (p<0.05) in the Group 1. In Group 2, no changes were observed in the IgA, IgG and IgM levels. CONCLUSIONS: We conclude that regular and moderate exercise has favorable effects on the immune system by increasing immunoglobulins which are potent protective factors.

Adrenocorticotropic Hormone↗

PubMed2005

Exercise intensity and its effects on thyroid hormones.

BACKGROUND: Physical activity influences energy metabolism in human subjects by increasing activity-induced energy expenditure and resting metabolic rate for several hours after exercise. Effects of exercise on circulating thyroid hormone values remain controversial. We have investigated the effect of acute aerobic exercise on thyroid hormone values. MATERIALS/METHODS: The effect of different intensity levels of acute aerobic exercise on thyroid hormones was investigated in 60 male well-trained athletes by performing bicycle ergometer at 45% (low intensity), 70% (moderate intensity), and 90% (high intensity). These intensities were selected according to their maximum heart rate (MHR). At each intensity level, heart rate, blood lactic acid, serum total thyroxine (T4), free thyroxine (fT4), total triiodothyronine (T3), free triiodothyronine (fT3) and thyroid stimulating hormone (TSH) values were measured. RESULTS: The results of this study show that exercise performed at the anaerobic threshold (70% of maximum heart rate, lactate level 4.59 +/- 1.75 mmol/l) caused the most prominent changes in the amount of any hormone values. While the rate of T4, fT4, and TSH continued to rise at 90% of maximum heart rate, the rate of T3 and fT3 started to fall. CONCLUSIONS: Maximal aerobic exercise greatly affects the level of circulating thyroid hormones.

Adult↗

PubMedDate not supplied

Effect of chronic exercise on immunoglobin, complement and leukocyte types in volleyball players and athletes.

BACKGROUND: The objective of this study was to investigate the effect of various sports disciplines on basic elements of the acquired and natural defense systems and to compare their results with that of non-sporting controls. MATERIALS/METHODS: The study included 15 sedentary (Group 1), 15 volleyball players (Group 2) and 15 long distance running athletes (Group 3). The VO2 Max for the groups was determined by subjecting the individuals to a 20 meter Shuttle run test. Immunoglobin and complement levels were measured by the turbidometric method. Leukocyte counts were made through peripheral blood smear examination. RESULTS: The IgA levels in sedentary living individuals was found to be lower than that in volleyball and athlete groups while that in athletes was in turn lower than that in volleyball players (p<0.05). In volleyball players the IgG level was significantly higher than both the sedentary living individuals and the athletes (p<0.05). IgM however, showed a significantly higher level in the sedentary group than in both athletes and volleyball players. The C3 levels in athletes was significantly lower than that of volleyball players and sedentary individuals (p<0.05), while the C4 levels were higher in the volleyball group (p<0.05). The leukocyte, eosinophil, and monocyte counts in the athletes were also significantly lower than those in the volleyball and sedentary groups (p<0.05). The values for the sedentary group on the other hand however, was found to be lower than those of the volleyball players (p<0.05). The neutrophil counts was lower in the sedentary group than in the volleyball group (p<0.05). The levels in the athlete group was lower than that in the volleyball group, however (p<0.05). The lymphocyte counts in volleyball players was higher than that in the sedentary group (p<0.05). CONCLUSIONS: In conclusion, changes in the immune parameters were found to be dependent on the type of physical exercise performed on regular basis. Considering the protective antibody response in those performing regular sports, moderate exercise carried out on regular basis can be said to affect positively mononuclear and polymorphonuclear phagocytic cells--the basic elements of the natural immune system.

Adult↗