Müsabık genç tenis oyuncularının sezinleme zamanı performanslarının incelenmesi

06.03.2018 tarihli ve 30352 sayılı Resmi Gazetede yayımlanan “Yükseköğretim Kanunu İle Bazı Kanun Ve Kanun Hükmünde Kararnamelerde Değişiklik Yapılması Hakkında Kanun” ile 18.06.2018 tarihli “Lisansüstü Tezlerin Elektronik Ortamda Toplanması, Düzenlenmesi ve Erişime Açılmasına İlişkin Yönerge” gereğince tam metin erişime açılmıştır.Bu araştırmada, tenis oyuncularının sezinleme zamanı performanslarının incelenmesi ve sedanterlerle karşılaştırılması amaçlamıştır. Araştırma grubunu Ankara ilinde en az 24 ay düzenli tenis antrenmanına katılmış 8 ? 10 yaş grubu 75 müsabık erkek/kız tenis oyuncusu ile aynı yaş grubundan Ankara ilinde yaşayan 85 sedanter oluşturmaktadır. Sezinleme zamanı performanslarının ölçümünde, "Bassin Anticipation Timer" ölçüm aracı kullanılmıştır. Çalışmada elde edilen bulgular değerlendirilirken, istatistiksel analizler için SPSS (Statistical Package for Social Sciences) for Windows 15 programı kullanılmıştır. Niceliksel verilerin karşılaştırılmasında iki grup durumunda, gruplar arası karşılaştırmalarında Bağımsız örnekler (Independent samples) ?T? testi ve grup içerisinde elde edilen verilerle, yaşlar arasında farklılık olup olmadığını test etmek amacıyla Varyans Analizi (Anova) kullanılmıştır. Ölçümler sonucunda; tenis oyuncularının sezinleme zamanı performansları sedanterlerin sezinleme zamanı performanslarından anlamlı olarak yüksek bulunmuştur. Tenisçi erkeklerin ve tenisçi kızların sezinleme zamanı performansları arasında ise anlamlı bir fark olmadığı bulunmuştur. Tenisçilerin sezinleme zamanı performansının yapılan yaş grupları arası karşılaştırmasına göre gruplar arasında belirgin bir farka rastlanmamıştır.The aim of this study was to investigate the coincidence timing accuracy (CTA) performance of the tennis players and compare them with the non-active controls. The experimental group consists of 75 competitive male and female tennis players aged between 8-10 who regularly attented at least 24-month tennis training in Ankara and the control group consists of 85 male and females aged between 8-10 living in Ankara. In the measurements of CTA performances, Bassin Anticipation Timer was used. When the data obtained from the study was analyzed, SPSS (Statistical Package for Social Sciences) for Windows 15 programme was utilized. In the case of two groups, Independent samples T-test were used for the comparison of qualitative data between groups and Variance analysis (Anova) were used to test whether there was a difference between ages by using the data obtained within the groups for the comparison of qualitative data. The results revealed that the CTA performances of the tennis players were significantly higher than the CTA performances of the controls. It was also determined that there was not a significant difference between the CTA performances of male and female tennis players. According to the comparison of the CTA performances of tennis players in terms of ages, there was not observed a significant difference between the age groups

The effects of hemodialysis on tear osmolarity

WOS: 000365249700001PubMed ID: 26640702Aim. To determine the effects of hemodialysis (HD) on tear osmolarity and to define the blood biochemical tests correlating with tear osmolarity among patients with end stage renal disease (ESRD). Material-Method. Tear osmolarity of ESRD patients before and after the hemodialysis program was determined as well as the blood biochemical data including glucose, sodium, potassium, calcium, urea, and creatinine levels. Results. Totally 43 eyes of 43 patients (20 females and 23 males) with a mean age of 53.98 +/- 18.06 years were included in the study. Tear osmolarity of patients was statistically significantly decreased after hemodialysis (314.06 +/- 17.77 versus 301.88 +/- 15.22mOsm/L, p = 0.0001). In correlation analysis, pre-HD tear osmolarity was negatively correlated with pre-HD blood creatinine level (r = -0.366, p = 0.016). Post-HD tear osmolarity was statistically significantly correlated with the post-HD glucose levels (r = 0.305 p = 0.047). Tear osmolarity alteration by HD was negatively correlated with creatinine alteration, body weight alteration, and ultrafiltration (r = -0.426, p = 0.004; r = -0.365, p = 0.016; and r = -0.320, p = 0.036, resp.). There was no correlation between tear osmolarity and Kt/V and URR values. Conclusion. HD effectively decreases tear osmolarity to normal values and corrects the volume and composition of the ocular fluid transiently. Tear osmolarity alteration induced by HD is correlated with body weight changes, creatinine alterations, and ultrafiltration

ACUTE EFFECTS OF STATIC STRETCHING, DYNAMIC EXERCISES, AND HIGH VOLUME UPPER EXTREMITY PLYOMETRIC ACTIVITY ON TENNIS SERVE PERFORMANCE

The purpose of this study was to compare the acute effects of static stretching; dynamic exercises and high volume upper extremity plyometric activity on tennis serve performance. Twenty-six elite young tennis players (15.1 ± 4.2 years, 167.9 ± 5.8 cm and 61.6 ± 8.1 kg) performed 4 different warm-up (WU) routines in a random order on non-consecutive days. The WU methods consisted of traditional WU (jogging, rally and serve practice) (TRAD); traditional WU and static stretching (TRSS); traditional WU and dynamic exercise (TRDE); and traditional WU and high volume upper extremity plyometric activity (TRPLYP). Following each WU session, subjects were tested on a tennis serve ball speed test. TRAD, TRSS, TRDE and TRPLYO were compared by repeated measurement analyses of variance and post-hoc comparisons. In this study a 1 to 3 percent increase in tennis serve ball speed was recorded in TRDE and TRPLYO when compared to TRAD (p< 0.05). However, no significant change in ball speed performance between TRSS and TRAD. (p> 0.05). ICCs for ball speed showed strong reliability (0.82 to 0.93) for the ball speed measurements.The results of this study indicate that dynamic and high volume upper extremity plyometric WU activities are likely beneficial to serve speed of elite junior tennis players

Acute effects of static stretching, dynamic exercises, and high volume upper extremity plyometric activity on tennis serve performance

The purpose of this study was to compare the acute effects of static stretching; dynamic exercises and high volume upper extremity plyometric activity on tennis serve performance. Twenty-six elite young tennis players (15.1 +/- 4.2 years, 167.9 +/- 5.8 cm and 61.6 +/- 8.1 kg) performed 4 different warm-up (WU) routines in a random order on non-consecutive days. The WU methods consisted of traditional WU (jogging, rally and serve practice) (TRAD); traditional WU and static stretching (TRSS); traditional WU and dynamic exercise (TRDE); and traditional WU and high volume upper extremity plyometric activity (TRPLYP). Following each WU session, subjects were tested on a tennis serve ball speed test. TRAD, TRSS, TRDE and TRPLYO were compared by repeated measurement analyses of variance and post-hoc comparisons. In this study a 1 to 3 percent increase in tennis serve ball speed was recorded in TRDE and TRPLYO when compared to TRAD (p 0.05). ICCs for ball speed showed strong reliability (0.82 to 0.93) for the ball speed measurements. The results of this study indicate that dynamic and high volume upper extremity plyometric WU activities are likely beneficial to serve speed of elite junior tennis players

Response to: Comment on “The Effects of Hemodialysis on Tear Osmolarity”

WOS: 000382636000001PubMed ID: 27641535We thank Onder Ayyildiz and Gokhan Ozge for their interest and comment on our paper “The Effects of Hemodialysis on Tear Osmolarity” [1, 2]. They thought that detection of TO would be performed at the same time of the day regarding the duration of hemodialysis (HD) which may avoid the bias of the methodology according to the study of Niimi et al. [3]. Niimi et al. have enrolled 38 medically healthy neophytes. Their subjects reported to the CRC an average of 14±2.0 hours (7–17 hours) after awakening for baseline measurements and sleeping at the CRC, thereby allowing for uniform environmental exposure (e.g., humidity and temperature) and timely collection of measurements upon awakening. The physical conditions of our clinic are not suitable for all HD patients to report 7 hours after awakening for baseline measurements and sleeping one day thereby allowing for uniform environmental exposure (e.g., humidity and temperature) and timely collection of measurements upon awakening