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    A COMPARISON OF CERTAIN TRACE ELEMENTS IN WRESTLERS BEFORE AND AFTER AEROBIC AND ANAEROBIC EXERCISES
    (STELLENBOSCH UNIV, 2011) Iri, Ruchan
    The purpose of the study was to observe reactions of serum levels of zinc, calcium, magnesium, iron and copper during different exercise intensities (aerobic-anaerobic). Male wrestlers (N=24) with a mean age of 21.91+/-2.08 years, currently studying at the Physical Education and Sports Academy of Nigde University, volunteered for this research. Height and weight, body fat percentage (skinfold), maximal oxygen uptake (Astrand-Ryhming nomogram) and anaerobic values (Wingate test) were measured. The participants were given exercises performed at two different intensities until exhaustion in which subjects exercised for 30 minutes at 70% of their maximal oxygen uptake (60rpm on the bicycle ergometer) and at 125% of their VO2max load (60rpm on the bicycle ergometer) as an anaerobic exercise. Blood samples were taken at rest after both aerobic and anaerobic exercises. Subsequently, serum samples were measured by the,flame atomic absorption spectrophotometric method. Statistically significant changes were determined in all levels of serum zinc, calcium, magnesium, iron and copper. The duration and the intensity of the exercises had significant effects on the levels of the used trace elements.
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    Effect of 15 days zinc loading upon zinc, lactic acid and creatine kinase levels of wrestlers
    (ASIAN JOURNAL OF CHEMISTRY, 2007) Iri, Ruchan; Gokdemir, Kadir; Cicioglu, Ibrahim
    In order to investigate the effect of zinc loading upon the performance of the sportsmen, some wrestlers were subjected to a 15 d zinc loading and completion period training and their effects on lactic acid, zinc and creatine kinase levels were monitored at rest and after heavy exercise. The study covered 20 wrestlers in University wrestling team. The average ages of the wresters was 23.1 +/- 2.46 years for group I and 20.8 +/- 1.16 years for group II. The average weights and height of the groups I and II are 81.4 +/- 18.18 kg and 173.50 +/- 9.61 cm and 72.6 +/- 5.67 kg and 169.47 +/- 8.65 cm, respectively. The MaxVO(2) values of group I and group II were 2.82 +/- 0.20 L/min and 2.70 +/- 0.10 L/min, respectively. Group 11 (the control group) was given fruit juice during the 15 d experimental period while the Group I (the experimental group) was administered 2 mg/kg day Zn with fruit juice in the same period. The blood samples necessary for the determination of plasma zinc, lactic acid, creatine kinase and hemograms levels were taken from the. wrestlers prior to the zinc loading at resting (D1, D2) and after being subjected to a cycling exercise(D2, K2). The second stage was taking the blood samples after 15 d of loading zinc again at resting (D3, K3) and after cycling exercise (D4, K4). The arithmetic means and standard deviations of the data obtained were computed and 't' test was applied to the differences between the dependent and independent groups and the data were evaluated at p < 0.05 and < 0.01 significance level. It was determined that the administration of zinc increased the muscle strength of the wrestlers and has a positive effect against exhaustion and on performance by inhibiting the lactic acid release following a 15 d competition period training. The increased levels of zinc were both due to the administration of zinc and heavy training. However the CK levels of the wrestlers were found to be effected from the training but insensitive to zinc loading.
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    Effects of competition term trainings on leptin values of female judokas
    (ACADEMIC JOURNALS, 2011) Celik, M. Nuri; Iri, Ruchan
    The purpose of this study was to measure serum leptin and insulin levels of 16 female judokas between the ages of 16 and 19 in the Turkish national judo team and to compare the values before and after 6-week training program height and weight values of athletes participated in the study were measured before and after the training period. The percentage of body fat was measured by Holtain brand skin fold and body mass index (BMI) was calculated with the weight (kg)/Heigth (m(2)) formula. Aerobic capacity was measured by 20 m shuttle run test and anaerobic capacity was measured by vertical jump test. Insulin and leptin values of female judokas participated in the study were measured from the blood samples taken from venous vessels. Measurement values were expressed as ng/ml. Wilcoxon paired two-sample test and SPSS (Statistical Package for the Social Sciences) version 16 statistical program package were applied for the arithmetic mean and standard deviation of data and Z values obtained from study and calculated at the p < 0.05 significance level at the end of the statistical analysis, a reduction of -3.52 at weight values and a significant difference (according to p < 0.05) of 3.52 at BMI values of pre- and post-training values, -3.21 at body fat percentage, -3.52 at aerobic power, -2.43 at anaerobic power and -1.97 at leptin levels were observed. Also, a non-significant change of 0.57 (according to p < 0.05) at pre- and post-training values of insulin level was observed. At the end of this study, it was observed that judo competition term preparation training decreases weight, body mass index, and body fat content and leptin values but not changes the insulin value.
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    PHYSICAL ACTIVITY LEVELS AND MOTOR SKILLS OF 5th TO 7th GRADE STUDENTS IN NIGDE PROVINCE
    (STELLENBOSCH UNIV, 2017) Iri, Ruchan; Aktug, Zait Burak; Ibis, Serkan
    The physical activity (PA) and motor skill levels (MS) (flexibility, balance, speed, situp, hand grip strength, standing long jump) were determined for 5(th) to 7(th) grade students from central schools in Nigde Province, Turkey according to age and gender and to investigate the relationships. PAL was determined by means of Physical Activity Scale for Adolescents. MS included hand grip, standing long jump, flamingo balance, sit-and-reach and sit-up tests from Eurofit Test battery. Speed performance was tested with a 20-metre speed test. Independent samples Nest determined the difference between the males and females. One Way ANOVA test established the status of PAL and MS according to age. Source of difference Scheffe test was employed. Bivariate correlation determined the relationship between PAL and MS of gender groups. An inverse proportion was observed between age and PAL means for both genders. PAL of males was significantly higher than those of females. The relationship between the MS and PAL for males produced a negative relationship between PAL and BMI, but a positive significant relationship between sit-ups and standing long jump. For females, a negative significant relationship was observed between PAL and BMI and grip strength. Sit-ups, hand grip and standing long jump of males were significantly higher than those of females. MS increased significantly as age increased PAL was higher for males than females and there was a decrease as age increased
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    Physical activity levels and motor skills of 5th to 7th grade students in Nigde province
    (University of Stellenbosch, 2017) Iri, Ruchan; Aktug, Zait Burak; Ibis, Serkan
    The physical activity (PA) and motor skill levels (MS) (flexibility, balance, speed, sit-up, hand grip strength, standing long jump) were determined for 5th to 7th grade students from central schools in Nigde Province, Turkey according to age and gender and to investigate the relationships. PAL was determined by means of Physical Activity Scale for Adolescents. MS included hand grip, standing long jump, flamingo balance, sit-and-reach and sit-up tests from Eurofit Test battery. Speed performance was tested with a 20-metre speed test. Independent samples t-test determined the difference between the males and females. One Way ANOVA test established the status of PAL and MS according to age. Source of difference Scheffe test was employed. Bivariate correlation determined the relationship between PAL and MS of gender groups. An inverse proportion was observed between age and PAL means for both genders. PAL of males was significantly higher than those of females. The relationship between the MS and PAL for males produced a negative relationship between PAL and BMI, but a positive significant relationship between sit-ups and standing long jump. For females, a negative significant relationship was observed between PAL and BMI and grip strength. Sit-ups, hand grip and standing long jump of males were significantly higher than those of females. MS increased significantly as age increased. PAL was higher for males than females and there was a decrease as age increased. © 2017, University of Stellenbosch. All rights reserved.
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    The effect of fatigue in elite young female wrestlers upon balance performance and reaction time
    (SCIENTIFIC PUBLISHERS INDIA, 2016) Iri, Ruchan; Aktug, Zait Burak; Koc, Mustafa; Sahin, Ibrahim; Murathan, Fatih
    The purpose of the study was to investigate the effect of fatigue in Turkish National Team Young Female Wrestlers upon balance performance and reaction time. Totally 17 female wrestlers with 18.58 +/- 2.26 years age average, 165.65 +/- 6.88 cm height average, 62.55 +/- 9.35 kg weight average, and 22.53 +/- 2.03 kg/m(2) body mass index were included into the study voluntarily. The wrestlers participated into the research were asked to make a match in accordance with the real conditions. Static-dynamic balance performance and reaction time tests were performed to the female wrestlers as rested before and as fatigue after the match. Static-dynamic balance measurements of the wrestlers were determined using Biodex Balance System, visual reaction time measurements were determined using MOART Lafayette Reaction Measurement Device, and fatigue levels were determined using handheld Lactate analyser. Whereas negative relationship (p<0.005, r=-0.577) was found between after match (fatigue) lactate level and after match static balance (p<0.005, r=-0.505) and dynamic balance, after match lactate level was determined not to have a significant relationship with after match reaction time (p>0.005, r=0.395). Consequently, the balance skill as one of the most important requirements of high performance in wrestling was determined to deteriorate through the increase at fatigue level. Moreover, although no significant relationship was found between fatigue and reaction time, the time for fatigue reaction time was noticed to be higher rather than rested reaction time.