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    Diurnal Variation in Anaerobic Performance: Effect of Core Body Temperature
    (Selçuk Üniversitesi, 2019 Nisan) Pense, Mehmet; Harbili, Erbil; Harbili, Sultan
    The purpose of this study was to investigate the effects of circadian rhythm on anaerobic performance and body temperature determined through three different methods. Ten elite male taekwondo athletes (average age: 23.9±2.7 years, height: 178.7±4.9 cm, body mass: 72.1±7.8 kg, training experience: 12.5±4.9 years) participated in the study. The body temperatures of the participants were measured in the morning of the first day, (between 09:00-10:00 a.m.), and in the early evening (between 16:00- 17:00 p.m.) through three different methods (Core body temperature, tympanic temperature, and skin surface temperature). The participants performed Wingate test (WT) both in the morning and in the early evening. Core body temperature was significantly higher in early evening than it was in the morning (p<0.05), while tympanic and skin surface temperatures remained unchanged (p>0.05). However, there was no significant difference between morning and early evening for peak power, mean power, and fatigue index values (p>0.05). As a result, a significant increase was observed in core body temperature in early evening compared to morning, but this increase did not show a positive effect on anaerobic performance.
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    Öğe
    Effect of glycerol supplementation in male volleyball players on total body water, body temperature and heart rate
    (SILA SCIENCE, 2012) Pense, Mehmet
    The aim of this study is to determine the effect of glycerol supplementation to be administered to elite male volleyball players on Total Body Water (TBW), Heart Rate (HR) and Body Temperature (BT) among the parameters causing negative effects on performance, being affected by dehydration during exercise. 13 male volleyball player subjects at elite level were put to 20 m. Modified Shuttle-Run Test (MST) by random, double blind crosses over experimental design. Subjects were administered 2 different solutions at amounts 20 mLkg(-1)VA before the test. Solution 1: 1.0 gkg(-1)VA glycerol (GS) mixed with 20 ml. kg(-1)VA water. Solution 2: 20 mLkg(-1)VA saccharin flavored distilled water (WS). Measurements were performed for 3 times, before and after supplementation phase and at the end of exercise. Total Body Water, Heart Rate, Body Temperature and Urine Density were measured in the study. In conclusion; it was determined that both glycerol and water supplementations delayed the formation of dehydration: But no significant difference was observed between groups of GS and WS in terms of KAH, TVS, ID and VS values (p > 0.05). In conclusion of this study, it was observed that the glycerol supplementation administered to volleyball players have no positive effect on body hydration, heart rate and body temperature and on the improvement of sportive performance.