Yazar "Birol, Abdulkadir" seçeneğine göre listele

Listeleniyor 1 - 3 / 3
  • Küçük Resim
    Öğe
    Akut l-arjinin suplementasyonunun tekrarlı sprint yeteneği performansına etkisi
    (Kırıkkale Üniversitesi, 2018) Birol, Abdulkadir; Kılınç, Fatma Nişancı
    L-arjinin, yoğun egzersizlerde toparlanmayı hızlandırma yeteneği iddası ile sporcular tarafından yaygın olarak kullanılan bir amino asittir. Bu çalışma, akut L-arjinin suplementasyonunun tekrarlı sprint yeteneği performansı üzerine olan etkisini araştırmak amacıyla yapılmıştır. Çalışmaya Ankaragücü 21 yaş altı futbol takımında oynayan, kronik bir hastalığı bulunmayan, sigara kullanmayan, 18-21 yaş arasındaki 20 gönüllü sağlıklı erkek futbolcu katılmıştır. Çalışma çift kör plasebo kontrollü olarak tasarlanmış ve 500 ml su içerisinde 0,15 g/kg/gün rölatif dozda L-arjinin ya da plasebo (sadece 500 ml su) tesadüfi olarak tekrarlı sprint yeteneği testinden (TSYT) 1 saat önce verilmiştir. Futbolcuların TSYT performansını belirlemek amacıyla 12x20 m TSYT protokolü her bir sprint arasında 30 saniyelik toparlanma aralıkları olacak şekilde sentetik çim futbol sahasında uygulanmış ve TSYT koşu sürelerinin saptanması amacıyla fotosel sistem (Fusion Sport Smart Speed Photocell, Avustralya) kullanılmıştır. Verilerin istatistiksel analizi SPSS for Windows paket programı ile yapılmıştır. Çalışmaya alınan utbolcuların genel özellikleri; yaş 18,310,47 yıl, boy uzunluğu 1777,70 cm, vücut ağırlığı 73,468,06 kg ve beden kütle indeksi 23,381,69 kg/m2 olarak saptanmıştır. Gruplar arasında yalnızca TSYT 9. sprint sürelesi bakımından istatistiksel olarak anlamlı bir fark bulunmuştur (p<0,05). Gurplar arasında; sprint düşüş yüzdesi, toplam sprint süresi, kan basıncı ve kalp atım hızı (KAH) bakımından istatistiksel olarak anlamlı bir fark bulunmamıştır (p>0,05). Sonuç olarak bu çalışmada rölatif dozda yapılan akut L-arjinin suplementasyonunun KAH, kan basıncı ve TSYT performansı üzerinde önemli bir etkisinin olmadığı belirlenmiştir. L-arjinin'in sprint performansı üzerine etkisinin daha iyi anlaşılabilmesi için farklı antrenman seviyesindeki sporcularda farklı suplementasyon dozlarıyla yapılacak ileri çalışmalara ihtiyaç vardır.
  • Küçük Resim
    Öğe
    The effect of acute L-arginine supplementation on repeated sprint ability performance
    (Mattioli 1885, 2019) Birol, Abdulkadir; Kilinc, Fatma Nisanci; Deliceoglu, Gokhan; Keskin, Esra Dilek
    Aim: The aim of this study is to determine the effect of acute L-arginine supplementation on repeated sprint ability performance in football players aged between 18-21 years. Methods: The study was conducted on 20 volunteer healthy male football players playing in the under-21 football team in the 1st league of Turkey. General characteristics of football players were questioned and their anthropometric measurements were taken. The study was performed as a double-blind placebo-controlled design. Players were randomly given 0.15 g/kg/day relative dosage L-arginine or placebo with 500 ml of water 1 hour before repeated sprint ability test (RSAT). The 12x20m RSAT protocol was applied in the synthetic turf football field with a recovery interval of 30 seconds between each sprint and the photocell system was used to determine running time. Results: The mean age of the arginine group is 18.30 +/- 0.48 years and the mean age of placebo group is 18.33 +/- 0.50 years. 85% of the players never used L-arginine, and any dietary supplements. Only the ninth sprint time of the 12 sprints performed after the supplementation was 5.24% faster than the placebo group in the arginine group (p<0.05). However, no difference was detected between the groups in terms of sprint decrement score, total sprint time, blood pressure and heart rate (HR) (p>0.05). Conclusion: In this study, the supplementation of acute L-arginine administered to players had no significant effect on HR, blood pressure and RSAT total sprint time and sprint decrement score.
  • [ X ]
    Öğe
    Three sessions of repeated sprint training in normobaric hypoxia improves sprinting performance
    (Cell Press, 2024) Birol, Abdulkadir; Aras, Dicle; Akalan, Cengiz; Aldhahi, Monira I.; Gulu, Mehmet
    The objective of the present study was to evaluate the impacts of three-session repeated sprint training conducted in normobaric hypoxia with 48-h intervals on sprint performance, arterial oxygen saturation (SpO2), and rating of perceived exertion (RPE) scores. A total of 27 moderately trained male university students voluntarily took part in this study. In this single-blind placebocontrolled study, subjects were assigned into normobaric hypoxia (FiO2: 13.6%; HYP), normobaric normoxia (FiO2: 20.9%; PLA), and control group (CON). The HYP and PLA groups underwent three repeated sprint training sessions (a total of four sets of five times 5-s sprints with a 5min rest between sets and a 30-s rest between each sprint) on a cycle ergometer in normobaric hypoxia or normoxia conditions. Pre- and post-tests were performed 72 h before and after the training period. Three participants were excluded from the study, and the data from twenty-four participants were analyzed. Contrary to what was observed in the pre and post tests, no time and condition interactions were observed in the relative peak power output (PPO), mean power output (MPO), percentage of sprint decrement score (Sdec%), and RPE parameters. Time effect was found in all observed variables respectively; relative PPO (F = 5.784, p = 0.045, eta 2 = 0.74), relative MPO (F = 3.927, p = 0.042, eta 2 = 0.66) and large time effect found for Sdec% (F =11.430, p = 0.046, 0.83), and RPE (F = 14.990, p = 0.008, eta 2 = 0.96). A notable increase in relative peak power output (PPO) and mean power output (MPO) was observed in the post-test in comparison to the pre-test values, indicating statistical significance. The increase in PPO was in HYP 13.44% (p = 0.006), in PLA 7.48% (p = 0.264) and in CON 2.66% (p = 0.088). The decrease in Sdec% was in HYP -13.34%% (p = 0.048), PLA -10.54 (p = 0.577) and CON -4.83 (p = 0.644) at post-test. The results show that although there were no statistical differences between the groups, notable differences in performance-related variables were observed in the HYP group after 3 sessions of repetitive sprint training in hypoxia.