Glikojen Depolarının ve Sıvı Besin Alımının Egzersiz Sırasında Yağ ve Karbonhidrat Kullanımına Etkisi

Amaç: Açlık durumunun yağ metabolizmasını aktive ettiği iyi bilinmektedir. Bunun yanında son yıllarda, egzersize düşük kas glikojen depoları ile başlamanın normal duruma göre yağ metabolizmasını daha iyi aktive ettiği ve antrenmana daha fazla adaptasyon sağladığı ile ilgili çalışmalar artmıştır. Bu çalışma, düşük kas glikojen depoları ile egzersiz yapılmasının yağ metabolizmasını daha fazla etkileyip etkilemediğini test etmek için planlanmış ve yapılmıştır. Bireyler ve Yöntem: Araştırmaya 9 erkek, triatlon sporcusu katılmıştır. Bir hafta ara ile, kahvaltıda sıvı besin verilen veya aç (1 gece) durumda egzersiz denemeleri dengeli randomize, çapraz dizaynda gerçekleştirilmiştir. Çalışma öncesi tüm katılımcılar VO 2 zirve ve zirve güç değerlerinin belirlenmesi için VO 2 zirve testine katılmışlardır. Katılımcılar her iki durumda (Sıvı besin Egzersiz: SE1, SE2 ve Aç Egzersiz: AE1, AE2) %70 VO 2 zirve’de 60 dk süren iki egzersiz denemesini 1 saat dinlenme aralığı ile yapmışlardır. Böylece ikinci egzersiz denemelerinin düşük kas glikojeni ile yapılması hedeflenmiştir. Bulgular: Toplam yağ oksidasyonu, SE1-SE2 (13.4±6.7 g/60 dk ve 23.9±7.6 g/60 dk, p

Effect of Glycogen Stores and Liquid Food Intake on Fat and Carbohydrate Utilization During Exercise

Aim: It is well known that fasting activates fat metabolism. Besides, in recent years many research studies accumulated that commencing exercise with low muscle glycogen is an effective strategy to activate fat metabolism and gain more training adaptation than normal muscle glycogen state. To test whether exercise with low glycogen stores is superior to activate fat metabolism we set up this study. Subjects and Methods: Nine male triathletes participated in this study. Consumption of liquid food breakfast or fasted (overnight) exercise trials were done separated by one week intervals with crossover, counterbalanced randomized design. Prior to the study all the subjects attended to maximal exercise test to determine VO 2 peak and peak power output (PPO). For both trial subjects attended to two 60 min exercise sessions at 70% VO 2 peak (Liquid food Exercise: LE1, LE2 or Fasted Exercise: FE1, FE2) with one hour resting period, thus the second exercise period aimed to be performed with low muscle glycogen stores. Results: Total fat oxidation in LE1 was significantly higher than both LE2 (LE1-LE2; 13.4±6.7 g/60 min versus 23.9±7.6 g/60 min, p

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