Person: PELVAN, SERDAR ORKUN
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PELVAN
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SERDAR ORKUN
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Publication Open Access Investigation of the effects of different exercise models on heart ratevariability and muscle oxygen saturation(2023-10-01) PELVAN, SERDAR ORKUN; Kalkan H., PELVAN S. O.The aim of the study was to investigate heart rate variability response and muscle oxygen saturation during and after different exercise patterns with similar heart rate ranges in athletes of different body region dominant sports (lower extremity and whole body), namely rowing and long-middle distance running. Eighteen volunteer male athletes competing in rowing and running participated in the study. The athletes performed a gradually increasing exercise test on the first day and a 6-minute exercise test at an individually calculated target heart rate on the second day. In the target heart rate test, RR values for the first 2 minutes were higher in runners (p<0.05). When a comparison was made between the two groups, it was found that muscle oxygen saturation values of both muscles were higher in the running group in the 1st minute (p<0.05). During post-test recovery, the intragroup RR values of both groups differed in the first 90 seconds (p<0.05). The results of the study show that the autonomic control processes during the acute recovery period are qualitatively different between muscle groups of different sizes trained with different exercise types in exercises with similar HR levels. RR values, especially during the fast phase of recovery, support this view.Publication Metadata only Yük artırmalı egzersizde kalp atım hızı değişkenliğinin spektral analizi(2007-05-26) ÇOTUK, HASAN BİROL; PELVAN, SERDAR ORKUN; KÜÇÜK YETGİN, MERAL; TOPSAKAL, NURİ; ÇOTUK H. B., PELVAN S. O., KÜÇÜK YETGİN M., KAYA B., ÜÇDAĞ G., BİÇER B., TOPSAKAL N.Publication Metadata only İnvestigation of the effects of different exercise models on heart rate variability and muscle oxygen saturation(2023-09-14) PELVAN, SERDAR ORKUN; Kalkan H., PELVAN S. O.Publication Open Access Farklı Kasılma Çeşitlerinin Postaktivasyon Potansiyeline Etkisinin İncelenmesi(2019) PELVAN, SERDAR ORKUN; Serhat YAĞCI;Serdar Orkun PELVANAmaç: Postaktivasyon potansiyeli (PAP), meydana gelen bir kas kasılmasının, takip edenikinci bir kasılmanın şiddetini artıracağı üzerine bir teoridir. Bu teori yapılan çalışmalarla desteklenmiş ve uzun süredir performans öncesi ısınma fazında kullanılan bir araç hâline gelmiştir. Bu çalışmada, elektromiyostimülasyon (EMS) ile kaslarda oluşturulan istemsiz kasılmaların PAP artışınaetkisi incelenmiştir. Bunun yanında, istemli ve istemsiz kasılmaların PAP etkisi karşılaştırılmıştır.Gereç ve Yöntemler: Çalışmada katılımcıların quadriceps kas gruplarında rastgele sıra ile farklı günlerde olmak üzere leg ekstensiyon makinası ile (1 RM’nin %85’i ile 6 tekrar) veya EMS cihazı ile (6tekrar 120 Hz, 4 sn kasılma 4 sn dinlenme) iki farklı kasılma yaratılmıştır. Uygulamalardan önce ve30.sn, 1. dk ve 3. dk sonrasında elde edilen dikey sıçrama yükseklikleri tekrarlayan ölçümlerdeANOVA analizi ile 0,05 anlamlılık düzeyinde incelenerek iki farklı uygulamanın PAP oluşturma etkileri incelenmiştir. Bulgular: Çalışma sonunda hem istemli kasılmalar hem de EMS ile oluşturulanistemsiz kasılmalar sonrası PAP cevabında anlamlı artış görülmüştür (p<0,05) İki uygulama arasında 30. sn ölçümlerinde PAP cevabında anlamlı bir fark bulunmazken; 1. dk ve 3. dk ölçümlerindeistemli kasılmalar ile sağlanan PAP cevabı EMS uygulamasına göre anlamlı derecede yüksek bulunmuştur (p<0,05). Çalışma sonunda, hem istemli yüksek şiddetli kasılmaların hem de EMS ileoluşturulan kasılmaların takip eden patlayıcı kuvvet özellikli kasılmaların şiddetini artırabileceği vebu artışın 3. dk’da hâlâ devam ettiği görülmüştür (p<0,05). Bunun yanında, LE uygulaması ile eldeedilen PAP artışı EMS uygulamasına göre daha erken ve yüksek görülmüştür. Sonuç: Bulgular ışığında, EMS ile oluşturulan istemsiz kasılmalar ile PAP artışı sağlanabileceği görülmüştür. Sonuçolarak, EMS’nin özellikle sportif yaralanma geçmişi olan ve yaralanma riski taşıyan sporcular tarafından PAP oluşumunda kullanılabilecek güvenli bir araç olduğu düşünülmektedir.Publication Open Access The effects of performances in canoe, kayak and rowing on muscle oxygen saturation: Experimental study(2023-01-01) PELVAN, SERDAR ORKUN; AKBAŞ, SAVAŞ; TOPAL M., PELVAN S. O., AKBAŞ S.Objective: The aim of this study is to compare the intramuscular oxygen saturation results during the short and long distance performances of canoe, kayak and rowing athletes. Material and Methods: 30 male international level and licenced athletes (8 canoeists, 11 kayakers and 11 rowers) are participate to this study; age 20.53±3.23 year, height 181.70±7.90 cm, body weight 78.60±11.22 kg and body mass index 23.73±2.37. The intramuscular oxygen saturation status of athletes were measured using the near infrared spectroscopy technology for 40 second sprint and 4 minutes tests performed on the land with branch-specific ergometers. Data collecting processes were recorded as 5 minute rest, 40 second sprint, 10 minute rest, 4 minute distance performances and 5 minute recovery, in total nearly 25 minute. Results: Comparing the intramuscular oxygen saturation values of canoe, kayak and rowing athletes, no significant difference was found in the decrement rate to minimum, during 40 second sprint for biceps brachii and vastus lateralis (p>0.05). As we compare to 4 minute performances, a significant difference was found in both muscle groups for all three branches. It was seen that the difference was between rowing and canoe athletes, and lower intramuscular oxygen saturation values were found in canoeists compared to rowers (p<0.05). Conclusion: The results show that intramuscular oxygen saturation it can be said that many factors effect such as differences between branches, posture position, cardiovascular differences between athletes, using of body parts, and number of stroke per minute.Publication Metadata only Performans takibinde yakın kızılaltı spektroskopi ve kas içi oksijen doygunluğu(2023-11-14) AKBAŞ, SAVAŞ; PELVAN, SERDAR ORKUN; Akbaş S., Pelvan S. O.Publication Metadata only Muscle blood content and muscle oxygen saturation in response to head down and head up tilt(PERGAMON-ELSEVIER SCIENCE LTD, 2020) DURU, ADİL DENİZ; Cotuk, Hasan Birol; Duru, Adil Deniz; Pelvan, Orkun; Akbas, SavasAs microgravity alters blood distribution and flow in muscle tissue, in the present study, blood content and oxygen saturation in extremity muscles were evaluated by an analogous body tilting model. For this purpose, the supine resting posture was compared with successive head down tilt (HDT) and head up tilt (HUT) in ten well trained male volunteers. Muscle oxygen saturation and total hemoglobin content were measured using near infrared spectroscopy sensors attached on the gastrocnemius, vastus lateralis and biceps brachii muscles of each body side. Simultaneously, continuous and noninvasive recordings of arterial blood pressure and heart rate variability were performed. The test protocol consisted of the following stages (5 min each): supine, 6 degrees HDT, 15 degrees HDT, 30 degrees HDT, supine, 6 degrees HUT, 15 degrees HUT, and 30 degrees HUT postures in successive order. The evolution of the rhythmic components in the recorded time series were analyzed by wavelet based multiscale time-frequency distributions, and synchronization between measurement sites by wavelet phase synchronization indexing. A support vector machine (SVM) algorithm was employed for classification of posture in relation to muscle total hemoglobin content or oxygen saturation. Increasing or decreasing gravitational impact due to the posture changes resulted in significant increases or decreases of total hemoglobin content in the muscles, but showed no linear relation to muscle oxygen saturation. This effect was stronger pronounced as the respective extremity part was located more centrifugal to the body tilting axis. Blood pressure and heart rate did not influence muscle oxygen saturation. The two major rhythmic components in the cardiovascular system, the 0.1 Hz and respiratory rhythm, were only weakly displayed in the muscle oxygen saturation time series. Oscillations of muscle oxygen saturation in the very low frequency band displayed left-right synchrony. SVM was able to classify postural changes of muscle blood content with good accuracy but not those of muscle oxygen saturation. These results imply that muscle oxygen saturation during acute postural changes may be mainly regulated by neural drive to the micro-vascular circulation and not by systemic cardiovascular kinetics.Publication Open Access Effects of sodium bicarbonate intake on performance in middle distancerunning with additional weight(2023-01-01) PELVAN, SERDAR ORKUN; DUT İ., PELVAN S. O., Akbulut H.In this study, the effects of external sodium bicarbonate (NaHCO3) intake on performance in middledistance running with additional weight were investigated. Male athletes (n=13) with an average age of 26.38 ± 2.81 (years) and 5.92 ± 1.84 (years) of sport experience, and with bodyweight of 77.83 ± 8.13 (kg) involved voluntarily. Performance measurements were made by Cooper run test, while the athletes carried a load with the additional weight of 20% of their body weight. One group of athletes were given 300 ml fruit juice mixed with 20 gr. starch and the other group was given sodium bicarbonate (NaHCO3) at a dosage of 0.3 g / kg mixed with 300 ml fruit juice given as single-blind. Anthropometric measurements, blood lactate, running distance and heart rate were measured on the test days. The analysis was examined by repetitive measures ANOVA at p<0.05 significance level via SPSS 14 program. The results revealed that running distances with the intake of sodium bicarbonate (NaHCO3) increased and there was a significant difference in blood lactate levels (p <0.05 ).In the Cooper test, it was observed that the performance of athletes who run with 20% of their body weight and use sodium bicarbonate (NaHCO3) increases.Publication Metadata only Investigation of the individual contribution to crew performance in rowing(2008-07-12) TOPSAKAL, NURİ; ÇOTUK, HASAN BİROL; PELVAN, SERDAR ORKUN; TOPSAKAL N., ÇOTUK H. B., PELVAN S. O.Publication Open Access The Effect of Graded Running Protocols On Peak Oxygen Consumption and Intramuscular Oxygen Saturation(2024-06-01) PELVAN, SERDAR ORKUN; AKBAŞ, SAVAŞ; ÇOTUK, HASAN BİROL; PELVAN S. O., AKBAŞ S., ÇOTUK H. B.Aim: The aim of this investigation was to examine the impact of two different running protocols on peak oxygen consumption (VO2max) and regional intramuscular oxygen saturation (SmO2) levels in one highly trained runner. Methods: VO2 and SmO2 were measured simultaneously during a gradually ascending running protocol and a Bruce protocol. VO2 was measured by breath-by-breath spiroergometer gas analysis system (ZAN®, Germany), and SmO2 was measured from both gastrocnemius muscles using a wireless near-infrared spectroscopy device (BSXinsight®, USA). The correlation between VO2 and SmO2 data was determined by Pearson correlation coefficients over the test stage mean values. The change of VO2 and SmO2 within each stage was determined by firstdegree polynomials. Results: Peak VO2 in the Bruce protocol (4640 ml/min) was higher than peak VO2 in the running protocol (4390 ml/min), but no difference was observed in end-test SmO2 decreases. There were highly significant negative correlations between VO2 values and SmO2 values (r=- 0.960-0.990, p<0.001). SmO2 values measured in the right and left gastrocnemius muscle decreased similarly in both protocols (r=0.993, r=0.987, p<0.001). Conclusion: Central and peripheral physiological processes of oxygen consumption are not always congruent, and the test protocol exert an influence due to the complex interplay of physiological and biomechanical factors.